{"id":18307,"date":"2026-09-15T07:43:03","date_gmt":"2026-09-14T23:43:03","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=18307"},"modified":"2026-10-21T10:47:33","modified_gmt":"2026-10-21T02:47:33","slug":"tool-steel-hardenability-chart","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/tool-steel-hardenability-chart\/","title":{"rendered":"\uacf5\uad6c\uac15 \uacbd\ud654\ub2a5 \ucc28\ud2b8"},"content":{"rendered":"<h1 class=\"wp-block-heading has-text-align-center\" id=\"h-tool-steel-hardenability-chart\">\uacf5\uad6c\uac15 \uacbd\ud654\ub2a5 \ucc28\ud2b8<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774 \uc139\uc158\uc740 \uac01 \uacf5\uad6c\uac15\uc774 \uc5b4\ub290 \uae4a\uc774\uae4c\uc9c0 \uacbd\ud654\ub418\ub294\uc9c0, \uc911\uc2ec\ubd80\uc5d0\uc11c \ub3c4\ub2ec\ud558\ub294 \uacbd\ub3c4, \uadf8\ub9ac\uace0 \ud574\ub2f9 \uacbd\ud654 \uc628\ub3c4\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \uc218\ub0c9 \uacbd\ud654 \uac15\uc885\uc740 \uc587\uc740 \ud45c\uce35\ub9cc \uacbd\ud654\ub418\uace0, \uc720\ub0c9 \uacbd\ud654 \uac15\uc885\uc740 \ub354 \uae4a\uc774 \uacbd\ud654\ub418\uba70, D2, A2, S7\uacfc \uac19\uc740 \uacf5\ub0c9 \uacbd\ud654 \uac15\uc885\uc740 \uac00\uc7a5 \ud070 \ube14\ub85d\uae4c\uc9c0 \uc644\uc804\ud788 \uacbd\ud654\ub418\ub294\ub370, \uc774\ub294 \ud574\ub2f9 \uac15\uc885\uc73c\ub85c \ub450\uaebc\uc6b4 \uae08\ud615 \uc139\uc158\uc744 \uc81c\uc791\ud560 \uc218 \uc788\ub294\uc9c0 \uc5ec\ubd80\ub97c \uacb0\uc815\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-section-size-each-grade-will-harden-through\" class=\"wp-block-heading\">\uac01 \ub4f1\uae09\uc774 \uacbd\ud654\ub418\ub294 \ub2e8\uba74 \ud06c\uae30<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ub2f4\uae08\uc9c8 \ub9e4\uccb4\uc640 \ud574\ub2f9 \ub2f4\uae08\uc9c8\uc5d0\uc11c \ub4f1\uae09\uc774 \uacbd\ud654\ub418\ub294 \uc9c1\uacbd, \uadf8\ub9ac\uace0 \ub2f4\uae08\uc9c8 \uc9c1\ud6c4 \ub3c4\ub2ec\ud558\ub294 \uacbd\ub3c4\uc785\ub2c8\ub2e4. \ub3d9\uc77c \ub4f1\uae09\uc758 \uacbd\ud654 \ubc0f \ub728\uc784 \uc628\ub3c4\ub294 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-hardening-tempering-chart\/\">\uacbd\ud654 \ubc0f \ud15c\ud37c\ub9c1 \ucc28\ud2b8<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\ub4f1\uae09<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654 \uae4a\uc774<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ub2f4\uae08\uc9c8 \ub9e4\uccb4<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uae09\ub7ad\ub41c HRC <sup>(a)<\/sup><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">W2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uce60 \uae4a\uc774 1\/8\u20133\/16 in. (3.2\u20134.8 mm)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc218\ub0c9<\/td><td class=\"has-text-align-left\" data-align=\"left\">68 HRC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/o1-tool-steel\/\">O1<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 1-3\/4 in. (44.5 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uae30\ub984<\/td><td class=\"has-text-align-left\" data-align=\"left\">64 ~ 65<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 3 in. (76.2 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uae30\ub984<\/td><td class=\"has-text-align-left\" data-align=\"left\">62\u201363<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/a2-tool-steel\/\">A2<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 4-1\/2 in. (114.3 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\uae30<\/td><td class=\"has-text-align-left\" data-align=\"left\">62\u201363<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/s7-tool-steel\/\">S7<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 2-1\/2 in. (63.5 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\uae30<\/td><td class=\"has-text-align-left\" data-align=\"left\">59\u201360<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/d2-tool-steel\/\">D2<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 5 in. (127 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\uae30<\/td><td class=\"has-text-align-left\" data-align=\"left\">61\u201363<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/m2-tool-steel\/\">M2<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 1-1\/2 in. (38.1 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\uae30<\/td><td class=\"has-text-align-left\" data-align=\"left\">65\u201366<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/ko\/h13-tool-steel\/\">H13<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc9c1\uacbd 2-1\/2 in. (63.5 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\uae30<\/td><td class=\"has-text-align-left\" data-align=\"left\">52\u201354<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd9c\ucc98: Tool and Die Making Troubleshooter (R. M. Leed), \ud45c 5-6, Bethlehem Steel \ub4f1\uae09 \ub370\uc774\ud130 \uc2dc\ud2b8\uc5d0\uc11c \ubc1c\ucdcc.<\/p>\n\n\n\n<h2 id=\"h-hardening-practice-for-die-steels-round-section\" class=\"wp-block-heading\">\uae08\ud615\uac15\uc758 \uacbd\ud654 \uc791\uc5c5, \uc6d0\ud615 \ub2e8\uba74<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ub4f1\uae09\uc774 \uc644\uc804\ud788 \uacbd\ud654\ub418\ub294 \ub2e8\uba74, \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uacbd\ub3c4, \uadf8\ub9ac\uace0 \uc774\ub97c \uc0dd\uc131\ud558\ub294 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4\uc785\ub2c8\ub2e4. \ub3d9\uc77c \ub4f1\uae09\uc758 \ub0b4\ub9c8\ubaa8\uc131 \ubc0f \uc778\uc131 \ub4f1\uae09\uc740 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-properties-chart\/\">\uc77c\ubc18 \ud2b9\uc131 \ucc28\ud2b8<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\ub4f1\uae09<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654 \uae4a\uc774<\/th><th class=\"has-text-align-left\" data-align=\"left\">HRC\uc5d0\uc11c \uadfc\ubb34<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654 \uc628\ub3c4<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ub2f4\uae08\uc9c8 \ub9e4\uccb4<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">W2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uce60 \uae4a\uc774 \uce21\uba74\ub2f9 \uc57d 1\/8 in. (3.2 mm)<\/td><td class=\"has-text-align-left\" data-align=\"left\">60\u201362<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,400\u20131,450 \u00b0F (760\u2013788 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc218\ub0c9 \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc6d0\ud615 2-1\/2 in. (63.5 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">56\u201358<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,725 \u00b0F (941 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc6d0\ud615 4-1\/2 in. (114.3 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">58\u201360<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,775 \u00b0F (968 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc6d0\ud615 5 in. (127 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">58\u201360<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,850 \u00b0F (1,010 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd9c\ucc98: Tool and Die Making Troubleshooter (R. M. Leed), \ud45c 5-8, W2, S7, A2 \ubc0f D2\uc5d0 \ub300\ud55c Bethlehem Steel \ub370\uc774\ud130 \uc2dc\ud2b8 \uc778\uc6a9.<\/p>\n\n\n\n<h2 id=\"h-hardening-practice-for-mold-steels-square-section\" class=\"wp-block-heading\">\uae08\ud615\uac15\uc758 \uacbd\ud654 \uc791\uc5c5, \uc815\uc0ac\uac01\ud615 \ub2e8\uba74<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uae08\ud615\uac15\uc740 \uc6d0\ud615\uc774 \uc544\ub2cc \uc815\uc0ac\uac01\ud615 \uc139\uc158\uc73c\ub85c \ud45c\uae30\ub429\ub2c8\ub2e4. \uc774\ub294 \uae08\ud615 \ube14\ub85d\uc758 \ud615\uc0c1\uc774 \uadf8\ub7ec\ud558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. A2\uc640 S7\uc774 \ub450 \ud45c\uc5d0 \ubaa8\ub450 \ub098\ud0c0\ub098\ub294 \uac83\ub3c4 \uac19\uc740 \uc774\uc720\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\ub4f1\uae09<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654 \uae4a\uc774<\/th><th class=\"has-text-align-left\" data-align=\"left\">HRC\uc5d0\uc11c \uadfc\ubb34<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654 \uc628\ub3c4<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ub2f4\uae08\uc9c8 \ub9e4\uccb4<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc815\uc0ac\uac01\ud615 4-1\/2 in. (114.3 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">58\u201360<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,775 \u00b0F (968 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc815\uc0ac\uac01\ud615 2-1\/2 in. (63.5 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">56\u201358<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,725 \u00b0F (941 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">420 SS<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc815\uc0ac\uac01\ud615 1-1\/2 in. (38.1 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">48\u201350<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,750\u20131,850 \u00b0F (954\u20131,010 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc815\uc0ac\uac01\ud615 1-1\/2 in. (38.1 mm)\uae4c\uc9c0<\/td><td class=\"has-text-align-left\" data-align=\"left\">46\u201348<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,850 \u00b0F (1,010 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uacf5\ub7ad \ub2f4\uae08\uc9c8<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">P-20<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc608\ube44 \uacbd\ud654, \uacbd\ud654 \ub2e8\uacc4 \uc5c6\uc74c<\/td><td class=\"has-text-align-left\" data-align=\"left\">28\u201332<\/td><td class=\"has-text-align-left\" data-align=\"left\">\ub0a9\ud488 \uc2dc \uc608\ube44 \uacbd\ud654<\/td><td class=\"has-text-align-left\" data-align=\"left\">\uc5c6\uc74c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd9c\ucc98: Tool and Die Making Troubleshooter (R. M. Leed), \ud45c 5-10, Bethlehem Steel \ub370\uc774\ud130 \uc2dc\ud2b8\uc5d0\uc11c \ubc1c\ucdcc.<\/p>\n\n\n\n<h2 id=\"h-how-hard-the-other-tooling-materials-are\" class=\"wp-block-heading\">\ub2e4\ub978 \uacf5\uad6c \uc7ac\ub8cc\uc758 \uacbd\ub3c4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uacf5\uad6c\uac15\uacfc \ud568\uaed8 \uae08\ud615\uc744 \uad6c\uc131\ud558\ub294 \ucf54\ud305 \ubc0f \ube44\ucca0\uac15 \uc7ac\ub8cc\uc758 \uacbd\ub3c4\ub97c Knoop \ubbf8\uc138 \uacbd\ub3c4\uc640 \uc77c\ubc18\uc801\uc73c\ub85c \uc778\uc6a9\ub418\ub294 Rockwell C \uac12\uc73c\ub85c \ub098\ud0c0\ub0c8\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uce35\uc744 \uc0dd\uc131\ud558\ub294 \ud45c\uba74 \ucc98\ub9ac\ub294 \ub2e4\uc74c\uc5d0 \uc124\uba85\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/blog\/tool-steel-surface-treatment\/\">\ud45c\uba74 \ucc98\ub9ac \ud398\uc774\uc9c0<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\uc7ac\ub8cc \ub610\ub294 \ucf54\ud305<\/th><th class=\"has-text-align-left\" data-align=\"left\">Knoop (HK)<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ub85d\uc6f0 C(HRC) <sup>(b)<\/sup><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">\ub2e4\uc774\uc544\ubaac\ub4dc<\/td><td class=\"has-text-align-left\" data-align=\"left\">9,000<\/td><td class=\"has-text-align-left\" data-align=\"left\">99<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc785\ubc29\uc815 \uc9c8\ud654\ubd95\uc18c<\/td><td class=\"has-text-align-left\" data-align=\"left\">5,000<\/td><td class=\"has-text-align-left\" data-align=\"left\">94<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc9c8\ud654\ud2f0\ud0c0\ub284<\/td><td class=\"has-text-align-left\" data-align=\"left\">2,800<\/td><td class=\"has-text-align-left\" data-align=\"left\">87<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\ubc14\ub098\ub4d0 \ud0c4\ud654\ubb3c<\/td><td class=\"has-text-align-left\" data-align=\"left\">2,500<\/td><td class=\"has-text-align-left\" data-align=\"left\">85<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\ud0c4\ud654\uaddc\uc18c<\/td><td class=\"has-text-align-left\" data-align=\"left\">2,400<\/td><td class=\"has-text-align-left\" data-align=\"left\">84<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc0b0\ud654\uc54c\ub8e8\ubbf8\ub284<\/td><td class=\"has-text-align-left\" data-align=\"left\">2,100<\/td><td class=\"has-text-align-left\" data-align=\"left\">83<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\ud145\uc2a4\ud150 \ud0c4\ud654\ubb3c<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,900<\/td><td class=\"has-text-align-left\" data-align=\"left\">82<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc9c0\ub974\ucf54\ub284 \uc0b0\ud654\ubb3c<\/td><td class=\"has-text-align-left\" data-align=\"left\">1,500<\/td><td class=\"has-text-align-left\" data-align=\"left\">77<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uac00\uc2a4 \uc9c8\ud654\uce35<\/td><td class=\"has-text-align-left\" data-align=\"left\">850\u20131,000<\/td><td class=\"has-text-align-left\" data-align=\"left\">65\u201370<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\ud06c\ub86c \ub3c4\uae08<\/td><td class=\"has-text-align-left\" data-align=\"left\">900\u20131,000<\/td><td class=\"has-text-align-left\" data-align=\"left\">68\u201370<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654\ub41c \uace0\uc18d\ub3c4\uac15<\/td><td class=\"has-text-align-left\" data-align=\"left\">800\u2013850<\/td><td class=\"has-text-align-left\" data-align=\"left\">63\u201365<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uacbd\ud654\ub41c \uacf5\uad6c\uac15<\/td><td class=\"has-text-align-left\" data-align=\"left\">460\u2013690<\/td><td class=\"has-text-align-left\" data-align=\"left\">45\u201360<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\uc5b4\ub2d0\ub9c1\ub41c \uac15<\/td><td class=\"has-text-align-left\" data-align=\"left\">185<\/td><td class=\"has-text-align-left\" data-align=\"left\">20<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd9c\ucc98: Tool and Die Making Troubleshooter (R. M. Leed), \ud45c 5-11, Bry Coat \uacbd\ub3c4 \ud658\uc0b0 \ucd94\uc815\uce58\uc5d0\uc11c \ubc1c\ucdcc.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub204\ud504(Knoop)\uc640 \ub85c\ud06c\uc6f0 C\ub294 \ub3d9\uc77c\ud55c \uc2a4\ucf00\uc77c\uc774 \uc544\ub2d9\ub2c8\ub2e4. 68 HRC\ub97c \ucd08\uacfc\ud558\ub294 \uac12\uc740 \uacbd\ub3c4 \ub370\uc774\ud130\ub85c\ubd80\ud130\uc758 \ud658\uc0b0\uac12\uc774 \uc544\ub2cc \uadfc\uc0ac\uce58\uc785\ub2c8\ub2e4. \ub204\ud504 \uac12\uc774 \ub192\uc544\uc9c8\uc218\ub85d \ub450 \uc2a4\ucf00\uc77c \uac04\uc758 \uad00\uacc4\ub294 \uc815\ud655\ub3c4\ub97c \uc783\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\uc704\uc758 \uc9c1\uacbd\uc740 \uc0ac\ubc29\uc774 \ub0c9\uac01\ub418\ub294 \uc6d0\ud615 \uc139\uc158\uc744 \uae30\uc900\uc73c\ub85c \ud55c \uac83\uc785\ub2c8\ub2e4. \uc2e4\uc81c \uae4a\uc774\ub294 \ubd80\ud488 \uc124\uacc4, \ubd80\ud488 \uc9c8\ub7c9, \uacbd\ud654 \uc628\ub3c4, \ub0c9\uac01 \uc18d\ub3c4\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\uba70, \ubb34\uac70\uc6b4 \uc9c1\uc0ac\uac01\ud615 \ube14\ub85d\uc758 \uc911\uc2ec\ubd80\ub294 \ub3d9\uc77c \uc911\ub7c9\uc758 \uc6d0\ud615 \ubd09\uc7ac\ubcf4\ub2e4 \ub354 \ub290\ub9ac\uac8c \ub0c9\uac01\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-reading-the-table\" class=\"wp-block-heading\">\ud45c \uc77d\ub294 \ubc29\ubc95<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uacbd\ud654\ub2a5\uc774 \uc88b\uc740 \uac15\uc740 \ub354 \uae4a\uace0 \uc548\uc804\ud558\uac8c \uacbd\ud654\ub429\ub2c8\ub2e4. \ub290\ub9b0 \ub0c9\uac01 \uc18d\ub3c4\uc5d0\uc11c \ubcc0\ud0dc\ud558\ub294 \uac15\uc885\uc740 \uacf5\uae30 \uc911\uc5d0\uc11c \ub2f4\uae08\uc9c8\ud560 \uc218 \uc788\uc73c\uba70, \uacf5\uae30 \ub2f4\uae08\uc9c8\uc740 \ubb3c\uc774\ub098 \uae30\ub984\ubcf4\ub2e4 \ubd80\ud488\uc5d0 \ud6e8\uc52c \uc801\uc740 \uc751\ub825\uc744 \uac00\ud558\ubbc0\ub85c \uc139\uc158\uc774 \uade0\uc5f4\ub418\uac70\ub098 \ubcc0\ud615\ub420 \uac00\ub2a5\uc131\uc774 \ub0ae\uc2b5\ub2c8\ub2e4. \uc774\uac83\uc774 \uacf5\ub0c9 \uacbd\ud654 \uac15\uc885\uc774 \uac00\uc7a5 \ub450\uaebc\uc6b4 \uae08\ud615 \uc139\uc158\uc744 \ub2f4\ub2f9\ud558\ub294 \uc774\uc720\uc774\uba70, <a href=\"https:\/\/aobosteel.com\/ko\/quench-cracking-tool-steel\/\">\ub2f4\uae08\uc9c8 \uade0\uc5f4<\/a> \uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ubb34\uac70\uc6b4 \ub2e8\uba74\uc5d0\uc11c \ub0ae\uc740 \uacbd\ud654\ub2a5 \ub4f1\uae09\uc5d0 \uad00\ud55c \uc774\uc57c\uae30\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub2f4\uae08\uc9c8 \ub9e4\uccb4\ub294 \uac15\uc885\ub9cc\ud07c \uc911\uc694\ud569\ub2c8\ub2e4. O1\uc740 \uc624\uc77c\uc774 \uad50\ubc18\ub418\uace0 \ub0c9\uac01\ub41c \uc0c1\ud0dc\uc5d0\uc11c\ub9cc 1-3\/4 in.\uae4c\uc9c0 \uacbd\ud654\ub418\uba70, \ub108\ubb34 \ub290\ub9ac\uac8c \ub2f4\uae08\uc9c8\ub41c \ubd80\ud488\uc740 \ubaa8\uc11c\ub9ac\uc5d0\uc11c\ub294 \uc644\uc804 \uacbd\ub3c4\ub97c \ub098\ud0c0\ub0b4\uc9c0\ub9cc \uc911\uc2ec\ubd80\uc5d0\uc11c\ub294 \ub0ae\uc740 \uacbd\ub3c4\ub97c \ubcf4\uc785\ub2c8\ub2e4. \ubb3c\uc5d0\uc11c \ub2f4\uae08\uc9c8\ud574\uc57c \uacbd\ud654\ub418\ub294 \ubd80\ud488\uc758 \uacbd\uc6b0, \uc139\uc158\uc740 \uacbd\ub3c4 \ubaa9\ud45c\uac00 \uc544\ub2cc \uade0\uc5f4 \uc704\ud5d8\uc5d0 \uc758\ud574 \uc81c\ud55c\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uacf5\ub0c9 \uacbd\ud654\ub294 \ubcc0\ud615\ub3c4 \uc801\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. D2\ub294 \uc804\uccb4 \uc0ac\uc774\ud074\uc5d0\uc11c \uce58\uc218 1 in.\ub2f9 \u00b10.0005 in. \ud33d\ucc3d\ud558\ub294 \ubc18\uba74, \uc720\ub0c9 \uacbd\ud654 \uac15\uc885\uc740 1 in.\ub2f9 0.0015 in. \ud33d\ucc3d\ud569\ub2c8\ub2e4. \uc774\ub294 \uacbd\ud654 \ud6c4 \uce58\uc218 \uc5f0\uc0ad\uacfc \ube14\ub85d\uc774 \uadfc\uc0ac\uce58\ub85c \ub098\uc624\uae30\ub97c \uae30\ub300\ud558\ub294 \uac83\uc758 \ucc28\uc774\uc785\ub2c8\ub2e4. \uac01 \uacc4\uc5f4\uc758 \uc218\uce58\ub294 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-size-change-in-heat-treatment\/\">\uce58\uc218 \ubcc0\ud654 \ucc28\ud2b8<\/a>, \uadf8\ub9ac\uace0 \uacf5\uae09\ub41c \uc5f4\uac04 \uc555\uc5f0 \ubd09\uc5d0\uc11c \uc81c\uac70\ud560 \uc18c\uc7ac\ub294 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-machining-allowance-chart\/\">\uac00\uacf5 \uc5ec\uc720 \ucc28\ud2b8<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub192\uc740 \uacbd\ud654\ub2a5\uc774 \ub192\uc740 \uc0ac\uc6a9 \uacbd\ub3c4\uc640 \uac19\uc740 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4. H13\uc740 2-1\/2 in.\uae4c\uc9c0 \uacbd\ud654\ub418\uc9c0\ub9cc 46~48 HRC\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc5f4\uac04 \uae08\ud615\uc740 \uace0\uc628\uc5d0\uc11c \uacbd\ub3c4\uc640 \uc778\uc131\uc744 \ub9de\ubc14\uafb8\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub4e4 \uac15\uc885\uc774 \uc720\uc9c0\ud558\ub294 \uace0\uc628 \uacbd\ub3c4\ub294 \ub2e4\uc74c\uc5d0 \ub098\uc640 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-hot-hardness-chart\/\">\uace0\uc628 \uacbd\ub3c4\ud45c<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc595\uc740 \uacbd\ud654 \uac15\uc885\uc774 \uc77c\ubd80 \uacf5\uad6c\uc5d0\ub294 \uc62c\ubc14\ub978 \uc120\ud0dd\uc785\ub2c8\ub2e4. W2\ub294 \ud55c \ubc88\uc758 \ub2f4\uae08\uc9c8\ub85c \uc778\uc131 \uc788\ub294 \uc911\uc2ec\ubd80 \uc704\uc5d0 \ub2e8\ub2e8\ud55c \ud45c\uce35\uc744 \uc81c\uacf5\ud558\uc5ec, \ub9c8\ubaa8\uba74\uacfc \ud30c\uc190\ub418\uc9c0 \uc54a\ub294 \ubab8\uccb4\uac00 \ud544\uc694\ud55c \ud380\uce58\uc5d0 \uc801\ud569\ud569\ub2c8\ub2e4. P20\uc740 28~32 HRC\ub85c \uc608\ube44\uacbd\ud654\ub41c \uc0c1\ud0dc\ub85c \uacf5\uae09\ub418\uba70 \uacf5\uad6c \uc81c\uc791\uc790\uac00 \uacbd\ud654\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c, \ub300\ud615 \uae08\ud615 \ube14\ub85d\uc774 \uc774 \uc7ac\ub8cc\ub85c \uc81c\uc791\ub429\ub2c8\ub2e4. \ub450 \uacbd\ub85c \ubaa8\ub450 \ub2e4\uc74c\uc5d0\uc11c \ub2e4\ub8f9\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-selection-by-application\/\">\uc6a9\ub3c4\ubcc4 \uc120\uc815<\/a> \ud398\uc774\uc9c0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc911\uc2ec\ubd80\ub97c \ud655\uc778\ud558\uc9c0 \uc54a\uc73c\uba74 \ub0ae\uc740 \ud45c\uba74 \uacbd\ub3c4 \ud310\ub3c5\uac12\uc740 \uacbd\ud654\ub2a5\uc5d0 \ub300\ud574 \uc544\ubb34\uac83\ub3c4 \ub9d0\ud574\uc8fc\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ud0c8\ud0c4\uacfc \ub290\ub9b0 \ub2f4\uae08\uc9c8\uc740 \ub0b4\ubd80\uac00 \uc62c\ubc14\ub974\uac8c \uacbd\ud654\ub41c \ubd80\ud488\uc758 \ud45c\uce35\uc744 \uc5f0\ud654\uc2dc\ud0b5\ub2c8\ub2e4. \uc2dc\ud5d8 \uc804\uc5d0 \uc218\ucc9c \ubd84\uc758 1\uc778\uce58\ub97c \uc808\ub2e8\ud558\uac70\ub098 \uc5f0\uc0ad\ud558\uace0, \ub2e4\uc74c\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624: <a href=\"https:\/\/aobosteel.com\/ko\/hardness-testing-methods\/\">\uacbd\ub3c4 \uc2dc\ud5d8 \ubc29\ubc95<\/a> \uc904 \uc2dc\ud5d8\uc73c\ub85c \ucda9\ubd84\ud558\uc9c0 \uc54a\uc744 \ub54c. \ub2e4\ub978 \uc2a4\ucf00\uc77c\ub85c \ud310\ub3c5\ub41c \uac12\uc740 \ub2e4\uc74c\uc5d0\uc11c \ud658\uc0b0\ub429\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-hardness-conversion-calculator\/\">\uacbd\ub3c4 \ubcc0\ud658 \uacc4\uc0b0\uae30<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uacbd\ud654\ub2a5\uc740 \ud0c4\uc18c\uc640 \uc774\ub97c \uace0\uc6a9 \uc0c1\ud0dc\ub85c \uc720\uc9c0\ud558\ub294 \ud569\uae08 \uc6d0\uc18c, \uc989 \ud06c\ub86c, \ubab0\ub9ac\ube0c\ub374, \ub9dd\uac04, \ud145\uc2a4\ud150\uc5d0\uc11c \ube44\ub86f\ub429\ub2c8\ub2e4. \uac01 \uac15\uc885\uc758 \ud654\ud559 \uc870\uc131\uc740 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-composition-chart\/\">\uc870\uc131 \ucc28\ud2b8<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud45c\uc758 \uc218\uce58\ub294 \uacbd\ud654\ub2a5\uc744 \uce21\uc815\ud558\ub294 \ub2e8\uba74 \ub2f4\uae08\uc9c8 \uc2dc\ud5d8(end-quench test)\uc5d0\uc11c \ub098\uc628 \uac83\uc785\ub2c8\ub2e4. 25 mm \uc6d0\ud615 \ubd09\uc7ac\ub97c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654\ud558\uace0 \uace0\uc815\uad6c\uc5d0 \uace0\uc815\ud55c \ud6c4 \ud55c\ucabd \ub05d\uc5d0\uc11c\ub9cc \ub2f4\uae08\uc9c8\ud558\uc5ec, \ub2e8\uc77c \uc2dc\ud3b8\uc73c\ub85c \uae38\uc774 \ubc29\ud5a5\uc758 \uc804\uccb4 \ub0c9\uac01 \uc18d\ub3c4 \ubc94\uc704\ub97c \ucee4\ubc84\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Tool-Steel-Hardenability-totten-fig-5-20-jominy-test-specimen.jpg\" alt=\"Jominy end-quench hardenability test: the 25 mm round specimen in its fixture with the water jet spraying the lower end, with specimen dimensions and quench conditions labelled\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 5.20. \uc870\ubbf8\ub2c8 \ub2e8\uba74 \ub2f4\uae08\uc9c8 \uc2dc\ud3b8\uacfc \uace0\uc815\uad6c. 25 mm \uc9c1\uacbd x 100 mm \ubd09\uc7ac\ub97c 24 \u00b1 3 \u00b0C\uc758 \ubc29\ud574\ubc1b\uc9c0 \uc54a\ub294 \ubb3c \ubd84\uc0ac\ub85c \ud558\ub2e8\uc5d0\uc11c \ub2f4\uae08\uc9c8\ud55c \ud6c4, \ub2f4\uae08\uc9c8\ub41c \ub05d\uc5d0\uc11c\ubd80\ud130 1\/16 in.\ub9c8\ub2e4 \uacbd\ub3c4\ub97c \ud310\ub3c5\ud569\ub2c8\ub2e4. \uac01 \ub0c9\uac01 \uc18d\ub3c4\uc5d0\uc11c \ud55c \ubc88\uc758 \uc2dc\ud5d8\uc73c\ub85c \uc704 \ud45c\uc758 \uacbd\ub3c4 \ub300 \uac70\ub9ac \uc218\uce58\ub97c \uac15\uc885 \uac04\uc5d0 \ube44\uad50 \uac00\ub2a5\ud558\uac8c \ub9cc\ub4ed\ub2c8\ub2e4. \ucd9c\ucc98: B. Li\u0161\u010di\u0107, Hardenability of Steel, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 5.20.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\uc704\uc758 \ud45c\ub294 \uc218\uce58\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc544\ub798 \ub2e4\uc774\uc5b4\uadf8\ub7a8\uc740 \uadf8 \uc218\uce58\uac00 \uc65c \uadf8\ub807\uac8c \ub098\uc624\ub294\uc9c0 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4: \uc2e4\uc81c \ub2f4\uae08\uc9c8\uc774 \uc0dd\uc131\ud558\ub294 \ub0c9\uac01 \uc18d\ub3c4\ub97c \uadf8 \uc704\uc5d0 \uadf8\ub9b0 \uacc4\uc0b0\ub41c \uc5f0\uc18d \ub0c9\uac01 \ubcc0\ud0dc \uace1\uc120\ub3c4\uc785\ub2c8\ub2e4. \ube60\ub978 \uace1\uc120\uc740 \ud398\ub77c\uc774\ud2b8\uc640 \ud384\ub77c\uc774\ud2b8 \uc2dc\uc791\uc120\uc744 \uc9c0\ub098 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc5d0 \ub3c4\ub2ec\ud558\uace0, \ub290\ub9b0 \uace1\uc120\uc740 \uba3c\uc800 \uc774\ub4e4\uc744 \uad50\ucc28\ud558\uc5ec \ud398\ub77c\uc774\ud2b8\uc640 \ud384\ub77c\uc774\ud2b8\ub85c \ub05d\ub098\ub294\ub370, \uc774\uac83\uc774 \uc5f0\uc9c8\ubd80\uc640 \ub3c4\uba74 \ubbf8\ub2ec \uacbd\ub3c4\uc758 \uc6d0\uc778\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Tool-Steel-Hardenability-totten-fig-2-20b-cct-diagram.jpg\" alt=\"Calculated continuous cooling transformation diagram for a 0.37C 1.45Mn 0.25Si steel with cooling curves for 100, 10, 1 and 0.1 C per second\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 2.20b. 0.37% C, 1.45% Mn, 0.25% Si \uac15\uc758 \uacc4\uc0b0\ub41c \uc5f0\uc18d \ub0c9\uac01 \ubcc0\ud0dc \uace1\uc120\ub3c4\ub85c, 100, 10, 1, 0.1 \u00b0C\/s\uc758 \ub0c9\uac01 \uace1\uc120\uc774 \uadf8\ub824\uc838 \uc788\uc2b5\ub2c8\ub2e4. \ud45c\uc2dc\ub41c \uace1\uc120\uc740 \ud398\ub77c\uc774\ud2b8, \ud384\ub77c\uc774\ud2b8, \ubca0\uc774\ub098\uc774\ud2b8 \ubc18\uc751\uc758 \uc2dc\uc791(0.1%)\uacfc \uac70\uc758 \uc644\ub8cc(99.9%)\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ub124 \uac00\uc9c0 \ub0c9\uac01 \uc18d\ub3c4\ub97c \uac00\ub85c\uc9c8\ub7ec \uc77d\uc73c\uba74 \uc704 \uacbd\ud654\ub2a5 \ud45c\uc758 \uc694\uc810\uc774 \ubcf4\uc785\ub2c8\ub2e4: \ub9e4\uccb4\uc640 \uc139\uc158 \ud06c\uae30\uac00 \ub2f4\uae08\uc9c8\uc774 \ubcc0\ud0dc \ucf54\ub97c \ubc97\uc5b4\ub098\ub294\uc9c0\ub97c \uacb0\uc815\ud558\uace0, \uac15\uc885 \uc774\ub984\uc740 \uadf8 \uc704\uce58\ub9cc \uc774\ub3d9\uc2dc\ud0b5\ub2c8\ub2e4. \uadf8\ub9bc 2.20\uc758 \ud328\ub110 (b); JMatPro\ub85c \uacc4\uc0b0\ub41c \ub2e4\uc774\uc5b4\uadf8\ub7a8, S.S. Babu, Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006\uc5d0\uc11c \uc7ac\ud604.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-match-the-quench-to-the-section\" class=\"wp-block-heading\">\ub2f4\uae08\uc9c8\uc744 \ub2e8\uba74\uc5d0 \ub9de\ucd94\uc2ed\uc2dc\uc624<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/aobosteel.com\/ko\/w1-tool-steel-heat-treatment\/\">\uc587\uc740 \ub2e8\uba74\uc5d0\ub294 \uc218\ub0c9, \uacbd\ud654\ub2a5\uc774 \ub0ae\uc740 \uac15\uc885\uc5d0 \uc801\uc6a9<\/a>, \uc911\uac04 \ubc94\uc704\uc5d0\ub294 \uc624\uc77c, \ubb34\uac81\uac70\ub098 \ub2e4\ub8e8\uae30 \uc5b4\ub824\uc6b4 \uac83\uc5d0\ub294 \uacf5\uae30. \uc139\uc158\uc5d0 \ud544\uc694\ud55c \uac83\ubcf4\ub2e4 \ube60\ub978 \ub2f4\uae08\uc9c8\uc740 \uc544\ubb34\uac83\ub3c4 \uc5bb\uc9c0 \ubabb\ud558\uace0 \uc751\ub825\ub9cc \ucd08\ub798\ud569\ub2c8\ub2e4. Aobo Steel\uc740 \uacf5\uae09\ud558\ub294 \uc6d0\ud615 \ubd09\uc7ac\uc640 \ud310\uc7ac \uc0ac\uc774\uc988\ub97c \ub2e4\uc74c\uc5d0 \uae30\uc7ac\ud569\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/tool-steels\/\">\uacf5\uad6c\uac15 \uce74\ud0c8\ub85c\uadf8<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc595\uc740 \uacbd\ud654 \uac15\uc885\uc740 \uacbd\ud654\ub2a5\uc774 \ubd09\uc7ac\uc758 \ucc98\uc74c \uba87 \ubc00\ub9ac\ubbf8\ud130\uc5d0\uc11c \uc18c\uc9c4\ub418\uae30 \ub54c\ubb38\uc5d0 \ud574\ub2f9 \uc2dc\ud5d8\uc5d0\uc11c \ub2e4\ub8e8\uae30 \uc5b4\ub824\uc6b4 \uacbd\uc6b0\uc785\ub2c8\ub2e4. \ub300\uc2e0 \uc774\ub4e4\uc744 \uc704\ud574 \ub450 \uac1c\uc758 \ud2b9\uc218 L \uc2dc\ud3b8\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2ec\uce35 \uacbd\ud654\uac00 \uc544\ub2cc \ubaa8\ub4e0 \uacbd\uc6b0\uc5d0 \ub300\ud574, \uc8fc\uc5b4\uc9c4 \ub9e4\uccb4\uc5d0\uc11c \uc644\uc804\ud788 \uacbd\ud654\ub418\ub294 \ubd09\uc7ac \uc9c1\uacbd\uc740 \uc774\uc640 \uac19\uc740 \ub3c4\ud45c\uc5d0\uc11c \uc77d\uc5b4\ub0b8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Hardenability-totten-fig-9-56-lamont-diagram-bar-diameter-jominy-h-value.jpg\" alt=\"Lamont diagram for the centre of round bars: bar diameter against the distance from the quenched end of a Jominy probe, for several quench severities H\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 9.56. \uc6d0\ud615 \ubd09\uc7ac \uc911\uc2ec\ubd80\uc5d0 \ub300\ud55c Lamont \ub3c4\ud45c: Jominy \uc2dc\ud3b8\uc758 \ub2f4\uae08\uc9c8 \ub2e8\ubd80\ub85c\ubd80\ud130\uc758 \uac70\ub9ac\uc5d0 \ub300\ud55c \ubd09\uc7ac \uc9c1\uacbd, \ub2e4\uc591\ud55c \ub2f4\uae08\uc9c8 \uac15\ub3c4 H\uc5d0 \ub300\ud574. \uc774 \ub3c4\ud45c\ub294 \ub2e8\ubd80 \ub2f4\uae08\uc9c8 \uace1\uc120\uc744 \uc8fc\uc5b4\uc9c4 \ub2f4\uae08\uc9c8 \uac15\ub3c4\uc5d0\uc11c \uc644\uc804\ud788 \uacbd\ud654\ub420 \uc9c1\uacbd\uc73c\ub85c \ubcc0\ud658\ud558\uba70, \uc774\ub294 \ub2f4\uae08\uc9c8\uc744 \ub2e8\uba74\uc5d0 \ub9de\ucd94\ub294 \uacc4\uc0b0\uc758 \uae30\ucd08\uac00 \ub41c\ub2e4: \uacbd\ud654\ub2a5\uc774 \ub0ae\uc740 \uac15\uc885\uc740 \ub192\uc740 H\uc640 \uc791\uc740 \uc9c1\uacbd\uc774 \ud544\uc694\ud558\uace0, \ub3d9\uc77c \uac15\uc885\uc774 \ub354 \ud070 \uc9c1\uacbd\uc5d0\uc11c\ub294 \ub354 \ube60\ub978 \ub9e4\uccb4\uac00 \ud544\uc694\ud558\ub2e4. \uc77c\ubc18\uc801\uc778 \ub9e4\uccb4\uc758 H \uac12\uacfc \ud568\uaed8 \uc77d\uc73c\uba70, \uc774\ub294 \uc815\uc9c0 \uc624\uc77c\uc758 \uc57d H 0.2\uc5d0\uc11c \uad50\ubc18\ub41c \ubb3c\uc758 \uc57d H 2.8\uae4c\uc9c0\uc774\ub2e4. \ucd9c\ucc98: H.M. Tensi, A. Stich and G.E. Totten, Quenching and Quenching Technology, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 9.56.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Tool-Steel-Hardenability-totten-fig-5-24-l-specimens-shallow-hardening.jpg\" alt=\"Two L specimens used for Jominy hardenability testing of shallow-hardening steels, dimensions in millimetres\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 5.24. \uacbd\ud654 \uae4a\uc774\uac00 \uc595\uc740 \uac15\uc758 \ub2e8\uba74\ub2f4\uae08\uc9c8 \uc2dc\ud5d8\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ub450 \uac00\uc9c0 L \uc2dc\ud3b8, \ubaa8\ub4e0 \uce58\uc218\ub294 \ubc00\ub9ac\ubbf8\ud130 \ub2e8\uc704. L\uc758 \ub178\uc988\ub294 \ud45c\uc900 \ubd09\ubcf4\ub2e4 \ubb3c \ubd84\ub958\uc5d0 \ub354 \uac00\uae4c\uc774 \uc704\uce58\ud558\ubbc0\ub85c, \uacb0\uc815\uc801\uc778 \ucc98\uc74c \uba87 \ubc00\ub9ac\ubbf8\ud130 \uad6c\uac04\uc5d0\uc11c \ub0c9\uac01 \uc18d\ub3c4\ub97c \ub298\ub824 \uacbd\ub3c4 \uc800\ud558\ub97c \ubd84\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uacbd\ud654\uce35 \uae4a\uc774\uac00 \uba87 \ubc00\ub9ac\ubbf8\ud130\uc5d0 \ubd88\uacfc\ud55c W1, W2\uc640 \uac19\uc740 \uc218\uacbd\ud654 \ud0c4\uc18c\uac15\uc5d0 \uc0ac\uc6a9\ub418\ub294 \uc2dc\ud3b8\uc785\ub2c8\ub2e4. \ucd9c\ucc98: B. Li\u0161\u010di\u0107, Hardenability of Steel, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 5.24.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-prehardened-is-a-different-purchase\" class=\"wp-block-heading\">\uc608\ube44 \uacbd\ud654\ub294 \ub2e4\ub978 \uad6c\ub9e4\uc785\ub2c8\ub2e4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P20\uacfc \uc608\ube44\uacbd\ud654 \uae08\ud615 \uac15\uc885\uc740 \uc0ac\uc6a9 \uacbd\ub3c4\ub85c \uacf5\uae09\ub418\uc5b4 \uae08\ud615\uc73c\ub85c \ubc14\ub85c \uac00\uacf5\ub429\ub2c8\ub2e4. \ube14\ub85d\uc774 \ub098\uc911\uc5d0 \uacbd\ud654\ub418\uc9c0 \uc54a\ub294 \ud55c \uacbd\ud654\ub2a5 \ud45c\ub294 \uc801\uc6a9\ub418\uc9c0 \uc54a\uc73c\uba70, \ub300\ubd80\ubd84\uc758 \uae08\ud615 \uacf5\uc7a5\uc740 \uc774\ub97c \ud53c\ud569\ub2c8\ub2e4. \uae08\ud615 \uac15\uc885\uc740 \ub2e4\uc74c \uc544\ub798\uc5d0 \ubd84\ub958\ub429\ub2c8\ub2e4: <a href=\"https:\/\/aobosteel.com\/ko\/plastic-mold-steels\/\">\ud50c\ub77c\uc2a4\ud2f1 \uae08\ud615\uac15<\/a>.<\/p>\n\n\n\n<h2 id=\"h-keep-the-cycle-with-the-steel\" class=\"wp-block-heading\">\uc0ac\uc774\ud074\uc744 \uac15\uc7ac\uc640 \ud568\uaed8 \uc720\uc9c0\ud558\uc2ed\uc2dc\uc624<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uacbd\ud654\ub2a5\uc740 \uac00\ub2a5\ud55c \uac83\uc744 \uacb0\uc815\ud558\uace0, \ub178 \uc0ac\uc774\ud074\uc740 \uc5bb\ub294 \uac83\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc740 <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-heat-treatment-guide\/\">\uc5f4\ucc98\ub9ac \uac00\uc774\ub4dc<\/a> \uacf5\uad6c\uac15 \uc0ac\uc774\ud074\uc774 \ud3ec\ud568\ud574\uc57c \ud558\ub294 \ub2e8\uacc4\ub97c \ub098\uc5f4\ud558\uba70, \ub2e4\uc74c\uc740 <a href=\"https:\/\/aobosteel.com\/ko\/blog\/verify-tool-steel-test-report\/\">\uc81c\ubd84\uc18c \uc778\uc99d\uc11c<\/a> \uacbd\ud654\ub2a5 \uacc4\uc0b0\uc5d0 \uc0ac\uc6a9\ub41c \ubd84\uc11d\uc744 \uc785\uc99d\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-section-size-beats-grade-name\" class=\"wp-block-heading\">\ub2e8\uba74 \ud06c\uae30\uac00 \ub4f1\uae09 \uc774\ub984\uc744 \uc774\uae41\ub2c8\ub2e4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ub3d9\uc77c \uac15\uc885\uc758 \ub450 \uae08\ud615\uc774\ub77c\ub3c4 \ud558\ub098\uac00 \ub2e4\ub978 \ud558\ub098\ubcf4\ub2e4 \ub124 \ubc30 \ubb34\uac70\uc6b0\uba74 \ub2e4\ub974\uac8c \uac70\ub3d9\ud569\ub2c8\ub2e4. \uc139\uc158\uc774 \ubb38\uc81c\uc778 \uacbd\uc6b0, \ud574\uacb0\ucc45\uc740 \ubcf4\ud1b5 \uce68\ud0c4 \uc2dc\uac04\uc744 \ub298\ub9ac\ub294 \uac83\uc774 \uc544\ub2c8\ub77c \ub2e4\ub978 \uac15\uc885\uc774\uba70, \ub2e4\uc74c\uc740 <a href=\"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/\">\ub4f1\uae09 \uc120\uc815 \uac00\uc774\ub4dc<\/a> \ub2e4\uc774 \uacf5\uc7a5\uc774 \uc9c1\uba74\ud558\ub294 \uc21c\uc11c\ub300\ub85c \uadf8 \ud2b8\ub808\uc774\ub4dc\ub97c \uac80\ud1a0\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uac19\uc740 \uace1\uc120\uc774 \uc139\uc158\uc758 \uc9c8\ubb38\uc5d0 \ub2f5\ud569\ub2c8\ub2e4: \uc8fc\uc5b4\uc9c4 \ub2f4\uae08\uc9c8 \ub9e4\uccb4\uc5d0\uc11c \uc911\uc2ec\ubd80\uc5d0 50% \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub97c \uc720\uc9c0\ud560 \uc218 \uc788\ub294 \ucd5c\ub300 \ubd09\uc7ac\ub294 \ubb34\uc5c7\uc778\uac00. \uc544\ub798 \ucc28\ud2b8\ub294 \ub450 \uac15\uc885\uc5d0 \ub300\ud574 \uc774\ub97c \ud55c \ubc88\uc5d0 \ud310\ub3c5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub3d9\uc77c\ud55c \ub2f4\uae08\uc9c8\uc744 \uc124\uba85\ud558\ub294 \ub450 \uac00\uc9c0 \ubc29\ubc95\uc778 Jominy \uac70\ub9ac\uc640 H \uac12\uc740 \ud558\ub098\uc758 \uad50\uc815 \uace1\uc120\uc73c\ub85c \uc5f0\uacb0\ub41c\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Hardenability-totten-fig-10-17-quench-severity-grossman-h-value-j-distance.jpg\" alt=\"Quench severity in terms of Grossman H value against Jominy distance, from 6 to 24 sixteenths of an inch\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 10.17. \ub2f4\uae08\uc9c8 \uac15\ub3c4(\uadf8\ub85c\uc2a4\ub9cc H \uac12) \ub300 \uc870\ubbf8\ub2c8 \uac70\ub9ac, 1\/16 in.\uc758 6\uc5d0\uc11c 24\uae4c\uc9c0. \uc774 \uace1\uc120\uc740 \ub3d9\uc77c\ud55c \ub2f4\uae08\uc9c8\uc5d0 \ub300\ud55c \ub450 \uac00\uc9c0 \uc124\uba85\uc744 \ubcf4\uc815\ud558\uc5ec, \ub2e8\uba74 \ub2f4\uae08\uc9c8 \uace1\uc120\uc740 \uc788\uc9c0\ub9cc \ub2f4\uae08\uc9c8\uacc4(quenchometer)\uac00 \uc5c6\ub294 \uacf5\uc7a5\ub3c4 \ub9e4\uccb4\uc5d0 \uac15\ub3c4 \uc218\uce58\ub97c \ubd80\uc5ec\ud560 \uc218 \uc788\uace0, \uac15\ub3c4 \uc218\uce58\uac00 \uc788\ub294 \uacf5\uc7a5\uc740 \ub2e8\uba74 \ub2f4\uae08\uc9c8 \uace1\uc120\uc774 \uc5b4\ub514\uc5d0 \uc704\uce58\ud574\uc57c \ud558\ub294\uc9c0 \uc608\uce21\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uadf8\ub9bc\uc740 \ucd9c\ucc98\uc5d0\uc11c R. Kern, Heat Treating, 1985\ub85c \ud45c\uae30\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ucd9c\ucc98: M. Narazaki and G.E. Totten, Distortion of Heat-Treated Components, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 10.17.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Tool-Steel-Hardenability-totten-fig-5-48-critical-diameter-from-jominy-curves.jpg\" alt=\"Determining the critical diameter of round bars from the Jominy hardenability curves of two steels, with hardness and bar diameter against distance from the quenched end\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 5.48. \ub2e8\uba74\ub2f4\uae08\uc9c8 \uace1\uc120\uc73c\ub85c\ubd80\ud130 \uc6d0\ud615 \ubd09\uc758 \uc784\uacc4 \uc9c1\uacbd\uc744 \uacb0\uc815\ud558\uae30. \uc704 \ucc28\ud2b8\ub294 0.45% \ud0c4\uc18c\uac15(Ck45)\uacfc 0.44% C \ud06c\ub86c-\ubab0\ub9ac\ube0c\ub374\uac15(50CrMo4)\uc758 Jominy \uacbd\ub3c4\ub97c \ub2f4\uae08\uc9c8\ub41c \ub05d\uc5d0\uc11c\ubd80\ud130\uc758 \uac70\ub9ac\uc5d0 \ub300\ud574 \ub098\ud0c0\ub0b4\uba70, 50% \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc5d0 \ud574\ub2f9\ud558\ub294 48 \ubc0f 45 HRC \uc218\uc900\uc774 \uac00\ub85c\uc9c8\ub7ec \ud45c\uc2dc\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798 \ucc28\ud2b8\ub294 \uadf8 \uac70\ub9ac\ub97c \ub450 \uac00\uc9c0 \ub2f4\uae08\uc9c8 \uac15\ub3c4, H = 5.0(\uaca9\ub82c\ud55c \uc5fc\uc218) \ubc0f H = 0.4(\uc815\uc9c0 \uc624\uc77c)\uc5d0 \ub300\ud55c \ubd09 \uc9c1\uacbd\uc73c\ub85c \ud658\uc0b0\ud569\ub2c8\ub2e4. \uacbd\ud654 \uae4a\uc774\uac00 \uc595\uc740 \uac15\uc885\uc740 \ud6e8\uc52c \uc791\uc740 \uc9c1\uacbd\uc5d0\uc11c 50% \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub97c \uc783\uac8c \ub418\uba70, \uc774\ub294 \uc704\uc5d0\uc11c \uc124\uba85\ud55c \ub2e8\uba74 \uce58\uc218\uc640\uc758 \uc0c1\ucda9 \uad00\uacc4\uc785\ub2c8\ub2e4. \ucd9c\ucc98: B. Li\u0161\u010di\u0107, Hardenability of Steel, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 5.48.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\uacbd\ud654\ub2a5 \ubc34\ub4dc\ub294 \uc804\uccb4 \ub17c\uc758\ub97c \ud558\ub098\uc758 \ucc28\ud2b8\uc5d0 \ub2f4\uc2b5\ub2c8\ub2e4. \ub2f4\uae08\uc9c8\ub41c \ub05d\uc5d0\uc11c \uc8fc\uc5b4\uc9c4 \uac70\ub9ac\uc5d0\uc11c \uac15\uc885\uc774 \uc720\uc9c0\ud560 \uac83\uc73c\ub85c \uc608\uc0c1\ub418\ub294 \uacbd\ub3c4 \ubc94\uc704\ub97c \uc81c\uacf5\ud558\uba70, \ubc34\ub4dc \ud3ed\uc740 \ud574\ub2f9 \uac15\uc885\uc5d0 \ub300\ud574 \uac15\uc7ac \uc81c\uc870\uc0ac\uc5d0 \ud5c8\uc6a9\ub418\ub294 \uc0b0\ud3ec\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Tool-Steel-Hardenability-totten-fig-3-21-hardenability-band.jpg\" alt=\"Steel hardenability band, HRC range against distance from the cooling surface in mm\"\/><figcaption class=\"wp-element-caption\">\uadf8\ub9bc 3.21. \uac15\uc758 \uacbd\ud654\ub2a5 \ubc34\ub4dc: \ub0c9\uac01 \ud45c\uba74\uc73c\ub85c\ubd80\ud130\uc758 \uac01 \uac70\ub9ac\uc5d0\uc11c \ud574\ub2f9 \uac15\uc885\uc774 \ucda9\uc871\ud558\ub294 HRC \ubc94\uc704(\uc74c\uc601). \uc0c1\ubd80 \uace1\uc120\uc740 \uace0\uacbd\ud654\ub2a5 \uc5f4\ucc98\ub9ac\uc7ac, \ud558\ubd80 \uace1\uc120\uc740 \uc800\uacbd\ud654\ub2a5 \uc5f4\ucc98\ub9ac\uc7ac\uc785\ub2c8\ub2e4. \ub450\uaebc\uc6b4 \ub2e8\uba74\uc740 \ucc28\ud2b8\uc758 \uc624\ub978\ucabd \ub05d\uc5d0\uc11c \uc77d\ud788\uba70, \uc5ec\uae30\uc11c \ubc34\ub4dc\ub294 \uc881\uace0 \ub0ae\uc740\ub370, \uc774\ub294 \uc704 \ud45c\ub4e4\uc758 \uae30\ucd08\uac00 \ub418\ub294 \ub2e8\uba74 \ud06c\uae30 \ud6a8\uacfc\uc785\ub2c8\ub2e4. \ucd9c\ucc98: A.V. Sverdlin and A.R. Ness, Fundamental Concepts in Steel Heat Treatment, in Steel Heat Treatment: Metallurgy and Technologies (G.E. Totten, ed.), CRC Press, 2006, Fig. 3.21.<\/figcaption><\/figure>\n\n\n\n<h3 id=\"h-related-reference-pages\" class=\"wp-block-heading\">\uad00\ub828 \ucc38\uc870 \ud398\uc774\uc9c0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-heat-treatment-troubleshooting-chart\/\">\uacf5\uad6c\uac15 \uc5f4\ucc98\ub9ac \ubb38\uc81c \ud574\uacb0 \ucc28\ud2b8<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/ko\/steel-heat-color-chart\/\">\uac15\ucca0 \uc5f4\uc0c9 \ucc28\ud2b8<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-tempering-chart\/\">\uacf5\uad6c\uac15 \ud15c\ud37c\ub9c1 \ucc28\ud2b8<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-annealing-normalizing-temperature-chart\/\">\uacf5\uad6c\uac15 \ud480\ub9bc \ubc0f \ubd88\ub9bc \ucc28\ud2b8<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/ko\/d2-austenitizing-temperature\/\">D2 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/ko\/tool-steel-forging-temperature-guide\/\">\uacf5\uad6c\uac15 \ub2e8\uc870 \uc628\ub3c4 \uac00\uc774\ub4dc<\/a> \u00b7 <a href=\"\/ko\/h-steel-composition-chart\/\">H \uac15\ucca0 \uc870\uc131 \ucc28\ud2b8<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd9c\ucc98: Tool and Die Making Troubleshooter (R. M. Leed, Hanser Gardner), Tables 5-6, 5-8, 5-10 and 5-11, \uc774\ub294 Bethlehem Steel Corporation \uac15\uc885 \ub370\uc774\ud130 \uc2dc\ud2b8(1976~1981)\uc640 Bry Coat \uacbd\ub3c4 \ud658\uc0b0 \ucd94\uc815\uce58\uc5d0\uc11c \uc720\ub798. \ube44\uad50\uc6a9 \ucc38\uc870 \ub370\uc774\ud130\uc5d0 \ubd88\uacfc\ud569\ub2c8\ub2e4. \uc0dd\uc0b0 \uc804\uc5d0 \uc2dc\ud5d8\ud3b8\uc73c\ub85c \uc790\uccb4 \ub178\uc5d0\uc11c \ub2f4\uae08\uc9c8\uacfc \uae4a\uc774\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624. Aobo Steel\uc740 \uc18c\ub454 \uc0c1\ud0dc\uc758 \uacf5\uad6c\uac15\uc744 \uacf5\uae09\ud558\uba70, \uacbd\ud654\ub294 \uace0\uac1d\uc774 \uc218\ud589\ud569\ub2c8\ub2e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>Tool Steel Hardenability Chart The section shows how deep each tool steel will harden, the hardness it reaches at the core, and the corresponding hardening temperature. Water-hardening grades harden a thin skin, oil-hardening grades go deeper, and air-hardening grades such as D2, A2, and S7 harden through the largest blocks, which determines whether a given [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-18307","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO 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Steel Hardenability Chart The section shows how deep each tool steel will harden, the hardness it reaches at the core, and the corresponding hardening temperature. 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