{"id":16020,"date":"2026-06-23T09:39:26","date_gmt":"2026-06-23T01:39:26","guid":{"rendered":"https:\/\/aobosteel.com\/?p=16020"},"modified":"2026-06-26T22:09:54","modified_gmt":"2026-06-26T14:09:54","slug":"4140-steel-properties","status":"publish","type":"post","link":"https:\/\/aobosteel.com\/ko\/blog\/4140-steel-properties\/","title":{"rendered":"4140\uac15: \ud2b9\uc131, \uacbd\ub3c4 \ubc0f \uc5f4\ucc98\ub9ac"},"content":{"rendered":"<h1 id=\"h-4140-steel-properties-hardness-and-heat-treatment\" class=\"wp-block-heading has-large-font-size\">4140\uac15: \ud2b9\uc131, \uacbd\ub3c4 \ubc0f \uc5f4\ucc98\ub9ac<\/h1>\n\n\n\n<h2 id=\"h-what-is-4140-steel\" class=\"wp-block-heading\">4140\uac15\uc774\ub780 \ubb34\uc5c7\uc778\uac00\uc694?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4140\uc740 \uc911\ud0c4\uc18c \ud06c\ub86c-\ubab0\ub9ac\ube0c\ub374 \ud569\uae08\uac15(AISI\/SAE 4140)\uc73c\ub85c, \uac00\uc7a5 \ub110\ub9ac \uc0ac\uc6a9\ub418\ub294 \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \uac15 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uc57d 0.40%\uc758 \ud0c4\uc18c, 1%\uc758 \ud06c\ub86c, \uadf8\ub9ac\uace0 0.2%\uc758 \ubab0\ub9ac\ube0c\ub374 \ud568\ub7c9\uc740 \uac15\ub3c4, \uc778\uc131, \uacbd\ud654\uc131\uc758 \uade0\ud615\uc744 \uc798 \uc774\ub8e8\uc5b4 \uc5f4\ucc98\ub9ac\ub97c \ud1b5\ud574 \ub2e8\uc77c \ub4f1\uae09\uc73c\ub85c \uad11\ubc94\uc704\ud55c \uac15\ub3c4 \uc218\uc900\uc744 \uad6c\ud604\ud560 \uc218 \uc788\uac8c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uad6d\uc81c\uc801\uc73c\ub85c\ub294 EN\/DIN\uc5d0\uc11c\ub294 42CrMo4(1.7225), JIS\uc5d0\uc11c\ub294 SCM440, GB\uc5d0\uc11c\ub294 42CrMo, UNS\uc5d0\uc11c\ub294 G41400\uc73c\ub85c \uc54c\ub824\uc838 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc18c\uc7ac \uc120\ud0dd\uc5d0 \uc788\uc5b4 \uc911\uc694\ud55c \ud55c \uac00\uc9c0 \uc810\uc740 4140 \ud569\uae08\uac15\uc774 \uacf5\uad6c\uac15\uc774 \uc544\ub2cc \uad6c\uc870\uc6a9 \ud569\uae08\uac15\uc774\ub77c\ub294 \uac83\uc785\ub2c8\ub2e4. 4140\uc740 \ud558\uc911\uc744 \uacac\ub514\uace0 \ud53c\ub85c \ud30c\uad34\uc5d0 \uac15\ud574\uc57c \ud558\ub294 \ucd95, \uae30\uc5b4, \ucc28\ucd95, \ubcfc\ud2b8, \ucee4\ud50c\ub9c1 \ubc0f \uae30\uacc4 \ubd80\ud488\uc5d0 \uc8fc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub0b4\ub9c8\ubaa8\uc131\uacfc \ub192\uc740 \uac00\uacf5 \uacbd\ub3c4\uac00 \uc911\uc694\ud55c \uc808\uc0ad, \ube14\ub7ad\ud0b9 \ub610\ub294 \uc131\ud615 \uacf5\uad6c\uc5d0\ub294 \uc801\ud569\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uacbd\uacc4\ub97c \uc815\ud655\ud788 \ud30c\uc545\ud558\ub294 \uac83\uc774 \ubd80\ud488\uc758 \uc218\uba85\uc744 \uc5f0\uc7a5\ud558\ub294 \uac83\uacfc \uc870\uae30\uc5d0 \uace0\uc7a5\ub098\ub294 \uac83\uc744 \uc88c\uc6b0\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-chemical-composition\" class=\"wp-block-heading\">\ud654\ud559\uc801 \uc870\uc131<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\uc694\uc18c<\/td><td>AISI 4140 (\uc911\ub7c9 %)<\/td><td>42CrMo4 \/ EN (\uc911\ub7c9 %)<\/td><td>GB 42CrMo (\uc911\ub7c9 %)<\/td><\/tr><tr><td>\ud0c4\uc18c(C)<\/td><td>0.38\u20130.43<\/td><td>0.38\u20130.45<\/td><td>0.38\u20130.45<\/td><\/tr><tr><td>\ub9dd\uac04(Mn)<\/td><td>0.75\u20131.00<\/td><td>0.60\u20130.90<\/td><td>0.50\u20130.80<\/td><\/tr><tr><td>\uc2e4\ub9ac\ucf58(Si)<\/td><td>0.15\u20130.35<\/td><td>\ucd5c\ub300 0.40<\/td><td>0.17\u20130.37<\/td><\/tr><tr><td>\ud06c\ub86c(Cr)<\/td><td>0.80\u20131.10<\/td><td>0.90\u20131.20<\/td><td>0.90\u20131.20<\/td><\/tr><tr><td>\ubab0\ub9ac\ube0c\ub374(Mo)<\/td><td>0.15\u20130.25<\/td><td>0.15\u20130.30<\/td><td>0.15\u20130.25<\/td><\/tr><tr><td>\uc778(P)<\/td><td>\ucd5c\ub300 0.035<\/td><td>\ucd5c\ub300 0.035<\/td><td>\ucd5c\ub300 0.035<\/td><\/tr><tr><td>\ud669(S)<\/td><td>\ucd5c\ub300 0.040<\/td><td>\ucd5c\ub300 0.035<\/td><td>\ucd5c\ub300 0.035<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ud06c\ub86c\uacfc \ubab0\ub9ac\ube0c\ub374\uc740 4140\uac15\uc744 1045\uc640 \uac19\uc740 \uc77c\ubc18 \ud0c4\uc18c\uac15\uacfc \uad6c\ubcc4 \uc9d3\ub294 \ud575\uc2ec \uc694\uc18c\uc785\ub2c8\ub2e4. \ud06c\ub86c\uc740 \uacbd\ud654\uc131\uacfc \ub0b4\ub9c8\ubaa8\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uace0, \ubab0\ub9ac\ube0c\ub374\uc740 \uacbd\ud654\uc131\uc744 \ub354\uc6b1 \uac1c\uc120\ud558\uace0, \uc801\uc815 \uc628\ub3c4\uc5d0\uc11c \uac15\ub3c4\ub97c \uc720\uc9c0\ud558\uba70, \uac00\uc5ed\uc801 \ud15c\ud37c \ucde8\uc131\uc5d0 \ub300\ud55c \ubbfc\uac10\ub3c4\ub97c \uac10\uc18c\uc2dc\ud0b5\ub2c8\ub2e4. \uc774 \ub450 \uc6d0\uc18c\uc758 \uc870\ud569\uc73c\ub85c 4140\uac15\uc740 \uc77c\ubc18 \ud0c4\uc18c\uac15\ubcf4\ub2e4 \ub450\uaebc\uc6b4 \ub2e8\uba74\uc5d0\uc11c\ub3c4 \ub354\uc6b1 \uade0\uc77c\ud558\uac8c \uacbd\ud654\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-mechanical-properties\" class=\"wp-block-heading\">\uae30\uacc4\uc801 \ud2b9\uc131<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4140\uac15\uc740 \ub2e8\uc77c \uace0\uc815 \uc870\uac74\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uacbd\uc6b0\uac00 \ub4dc\ubb45\ub2c8\ub2e4. \uc774 \uac15\uc7ac\uc758 \uac00\uce58\ub294 \uacbd\ub3c4\uc640 \uc778\uc131\uc744 \uc608\uce21 \uac00\ub2a5\ud558\uac8c \uad50\ud658\ud558\ub294 \ud15c\ud37c\ub9c1 \ud2b9\uc131\uc5d0 \uc788\uc73c\uba70, \ub530\ub77c\uc11c \ub3d9\uc77c\ud55c \uac15\uc7ac\ub97c \uc0ac\uc6a9\ud558\uc5ec 28 HRC\uc5d0 \uac00\uae4c\uc6b4 \uc778\uc131\uc774 \ub6f0\uc5b4\ub09c \uc0e4\ud504\ud2b8\uc5d0\uc11c 50 HRC \uc774\uc0c1\uc758 \uacbd\ub3c4\uac00 \ub192\uc740 \ub9c8\ubaa8 \ud45c\uba74\uae4c\uc9c0 \ub2e4\uc591\ud55c \uacbd\ub3c4 \uc870\uac74\uc744 \uc124\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\uc0c1\ud0dc<\/td><td>\uc778\uc7a5 \uac15\ub3c4<\/td><td>\ud56d\ubcf5 \uac15\ub3c4<\/td><td>\uc5f0\uc7a5<\/td><td>\uacbd\ub3c4<\/td><\/tr><tr><td>\uc5b4\ub2d0\ub9c1\ub41c<\/td><td>\uc57d 655 MPa<\/td><td>\uc57d 415 MPa<\/td><td>~25%<\/td><td>~197 HB<\/td><\/tr><tr><td>Q&amp;T, \uc800\uc628<\/td><td>1400~1800 MPa<\/td><td>1200~1600 MPa<\/td><td>8\u201312%<\/td><td>~45\u201352 HRC<\/td><\/tr><tr><td>Q&amp;T, \uc911\uac04 \uc628\ub3c4<\/td><td>1000~1200 MPa<\/td><td>800~1000 MPa<\/td><td>12\u201318%<\/td><td>~35\u201340 HRC<\/td><\/tr><tr><td>Q&amp;T, \uace0\uc628<\/td><td>800~1000 MPa<\/td><td>650~800 MPa<\/td><td>15\u201322%<\/td><td>~28\u201335 HRC<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2e4\uc81c \uac12\uc740 \ub2e8\uba74 \ud06c\uae30, \uc815\ud655\ud55c \uc5f4\ucc98\ub9ac \ub9e4\uac1c\ubcc0\uc218 \ubc0f \uc2dc\ud5d8 \ud45c\uc900\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\ubbc0\ub85c \uc774\ub7ec\ud55c \uac12\uc740 \ubcf4\uc7a5\ub41c \ucd5c\uc18c\uac12\uc774 \uc544\ub2cc \uc77c\ubc18\uc801\uc778 \ubc94\uc704\uc785\ub2c8\ub2e4. EN 10083-3\uacfc \uac19\uc740 \ud45c\uc900\uc5d0 \ub530\ub978 \uc778\uc99d\ub41c \ubb3c\uc131\uc740 \uc815\uc758\ub41c \ub2e8\uba74 \ud06c\uae30 \ubc0f \uc2dc\ud5d8 \uc704\uce58\uc640 \uc5f0\uad00\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-hardness-and-hardenability\" class=\"wp-block-heading\">\uacbd\ub3c4 \ubc0f \uacbd\ud654\uc131<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \uad6c\uc870\ub97c \uc644\uc804\ud788 \uac16\ub294 \uc587\uc740 \ub2e8\uba74\uc73c\ub85c \uae09\ub7ad\ub41c 4140\uac15\uc740 \ub300\ub7b5 54~58 HRC\uc758 \uacbd\ub3c4\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud15c\ud37c\ub9c1 \ud6c4 \uc2e4\uc81c \uc0ac\uc6a9 \uacbd\ub3c4\ub294 \ubcf4\ud1b5 50~55 HRC\uc774\uba70, \ub300\ubd80\ubd84\uc758 \uc0ac\uc6a9 \ud658\uacbd\uc5d0\uc11c\ub294 \uc720\uc6a9\ud55c \uc778\uc131\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud574 \uc774\ubcf4\ub2e4 \ub0ae\uc740 \uacbd\ub3c4\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uacbd\ub85c\ubcc4 \uacbd\ub3c4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc5b4\ub2d0\ub9c1 \ucc98\ub9ac\ub428:<\/strong> \uc57d 197 HB, \ubd80\ub4dc\ub7fd\uace0 \uac00\uacf5\ud558\uae30 \uc6a9\uc774\ud568<\/li>\n\n\n\n<li><strong>\uc644\uc804 \uacbd\ud654(\uc720\ub0c9):<\/strong> \ubc15\ud3b8(25mm \ubbf8\ub9cc)\uc5d0\uc11c\ub294 \ucd5c\ub300 \uc57d 55 HRC, 25~75mm\uc5d0\uc11c\ub294 \uc57d 45~52 HRC, 75mm \uc774\uc0c1\uc5d0\uc11c\ub294 \uc57d 35~45 HRC<\/li>\n\n\n\n<li><strong>\uc720\ub3c4 \uac00\uc5f4 \ub610\ub294 \ud654\uc5fc \uacbd\ud654 \ucc98\ub9ac:<\/strong> 50~58 HRC \uacbd\ub3c4\uc758 \ub2e8\ub2e8\ud55c \ucf54\uc5b4 \uc704\uc5d0 \ud615\uc131\ub41c \ucf00\uc774\uc2a4.<\/li>\n\n\n\n<li><strong>\uc9c8\ud654 \ucc98\ub9ac\ub428:<\/strong> \ud45c\uba74 \uacbd\ub3c4 ~500~650 HV (\ub300\ub7b5 49~58 HRC \uc0c1\ub2f9)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2e4\uc81c \ud55c\uacc4\ub294 \ucd5c\uace0 \uacbd\ub3c4\uac00 \uc544\ub2c8\ub77c \uacbd\ud654\uc131\uc785\ub2c8\ub2e4. 4140\uac15\uc740 \uacbd\ud654\uc131\uc774 \uc911\uac04 \uc815\ub3c4\uc5d0 \ubd88\uacfc\ud558\uae30 \ub54c\ubb38\uc5d0 \ub450\uaebc\uc6b4 \ubd80\ubd84\uc5d0\uc11c\ub294 \uc911\uc2ec\ubd80\uac00 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub97c \uc644\uc804\ud788 \ud615\uc131\ud558\uc9c0 \ubabb\ud560 \uc815\ub3c4\ub85c \ub0c9\uac01 \uc18d\ub3c4\uac00 \ub290\ub824 \uc911\uc2ec\ubd80 \uacbd\ub3c4\uac00 \ub5a8\uc5b4\uc9d1\ub2c8\ub2e4. \ub450\uaed8\uac00 \uc57d 100mm\ub97c \ub118\uc73c\uba74 \uc624\uc77c \ub2f4\uae08\uc9c8\ub85c\ub294 \uc911\uc2ec\ubd80\ub97c \ud45c\uba74\uacfc \uac19\uc740 \uc218\uc900\uc73c\ub85c \uacbd\ud654\uc2dc\ud0ac \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uc804\uccb4\uc801\uc73c\ub85c \ub2e8\ub2e8\ud574\uc57c \ud558\ub294 \ub300\ud615 \ubd80\ud488\uc758 \uacbd\uc6b0 \uc774\uac83\uc774 \uacb0\uc815\uc801\uc778 \uc694\uc778\uc774 \ub418\ubbc0\ub85c, \ub354 \uae4a\uc740 \uacbd\ud654\uc131\uc744 \uac00\uc9c4 \uac15\uc885\uc744 \uc0ac\uc6a9\ud558\uac70\ub098 \ub2e4\ub978 \uacf5\uc815\uc744 \uc801\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 id=\"h-heat-treatment\" class=\"wp-block-heading\">\uc5f4\ucc98\ub9ac<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uac00\uc5f4 \ub0c9\uac01:<\/strong> 830~870\u00b0C\ub85c \uac00\uc5f4\ud558\uace0 \uc720\uc9c0\ud55c \ub2e4\uc74c, \ub178\uc5d0\uc11c \ucc9c\ucc9c\ud788 \ub0c9\uac01\ud558\uc5ec \uc57d 197 HB\uc758 \ubd80\ub4dc\ub7fd\uace0 \uac00\uacf5\ud558\uae30 \uc26c\uc6b4 \uad6c\uc870\ub97c \uc5bb\ub294\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc815\uaddc\ud654:<\/strong> 870~900\u00b0C\ub85c \uac00\uc5f4\ud55c \ud6c4 \uacf5\ub7ad\ud558\uc5ec \uacb0\uc815\ub9bd\uc744 \ubbf8\uc138\ud654\ud558\uace0 \uacbd\ud654 \ub610\ub294 \uac00\uacf5 \uc804\uc5d0 \uad6c\uc870\ub97c \uace0\ub974\uac8c \ub9cc\ub4ed\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uacbd\ud654:<\/strong> 830~870\u00b0C\uc5d0\uc11c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654\ud558\uace0 \uc624\uc77c\uc5d0 \ub2f4\uae08\uc9c8\ud569\ub2c8\ub2e4. \uc624\uc77c\uc774 \ud45c\uc900\uc774\uba70, \ubb3c\uc774\ub098 \uc5fc\uc218\ub294 \ubcf5\uc7a1\ud55c \ud615\uc0c1\uc5d0\uc11c \uade0\uc5f4 \ubc1c\uc0dd \uc704\ud5d8\uc744 \ub192\uc774\ubbc0\ub85c \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ub2f4\uae08\uc9c8:<\/strong> \ucd5c\uc885 \ubb3c\uc131\uc744 \uacb0\uc815\ud558\uae30 \uc704\ud574 \uc57d 205\u00b0C\uc5d0\uc11c 650\u00b0C \uc0ac\uc774\uc758 \uc628\ub3c4\ub85c \uc5f4\ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub0ae\uc740 \uc628\ub3c4(~205\u00b0C): \ucd5c\uace0 \uacbd\ub3c4(~50~55 HRC), \ucd5c\uc800 \uc778\uc131<\/li>\n\n\n\n<li>\uc911\uc628(\uc57d 425~500\u00b0C): \uac15\ub3c4\uc640 \uc778\uc131\uc774 \uade0\ud615 \uc788\uac8c \ubd84\ud3ec, \uacbd\ub3c4 \uc57d 35~40 HRC<\/li>\n\n\n\n<li>\uace0\uc628(~540\u2013650\u00b0C): \ub3d9\uc801 \ubc0f \ud53c\ub85c \ud558\uc911\uc5d0 \ub300\ud55c \ucd5c\ub300 \uc778\uc131, ~28\u201335 HRC<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ucde8\uc131\ud654 \ud6a8\uacfc \uc911 \ub450 \uac00\uc9c0\ub294 \uc8fc\ubaa9\ud560 \ub9cc\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uac15\ud654\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8 \ucde8\uc131<\/strong> 260~370\u00b0C \ubc94\uc704\uc758 \ud15c\ud37c\ub9c1 \uacfc\uc815\uc5d0\uc11c \ubc1c\uc0dd\ud558\uba70, \ucda9\uaca9 \uc778\uc131\uc744 \uc800\ud558\uc2dc\ud0b5\ub2c8\ub2e4. \uc778\uc131\uc774 \uc911\uc694\ud55c \uacbd\uc6b0\uc5d0\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uc774 \uc628\ub3c4 \uad6c\uac04\uc744 \uac74\ub108\ub701\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uac00\uc5ed\uc801 \ud15c\ud37c \ucde8\uc131<\/strong> \uace0\uc628 \ud15c\ud37c\ub9c1 \ud6c4 375~575\u00b0C \ubc94\uc704\uc5d0\uc11c \ucc9c\ucc9c\ud788 \ub0c9\uac01\ub418\ub294 \ub450\uaebc\uc6b4 \ubd80\ubd84\uc5d0\uc11c \uc774\ub7ec\ud55c \ud604\uc0c1\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \uc778 \ubc0f \uc720\uc0ac\ud55c \ubd88\uc21c\ubb3c\uacfc \uad00\ub828\uc774 \uc788\uc2b5\ub2c8\ub2e4. 4140\uc5d0 \ud568\uc720\ub41c \ubab0\ub9ac\ube0c\ub374\uc740 \uc774\ub7ec\ud55c \uacbd\ud5a5\uc744 \uac10\uc18c\uc2dc\ud0a4\uba70, \ud15c\ud37c\ub9c1 \uc628\ub3c4\uc5d0\uc11c \ub354 \ube60\ub978 \ub0c9\uac01\uc740 \uc774\ub97c \ub354\uc6b1 \uc81c\ud55c\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-4140-or-a-tool-steel-matching-the-grade-to-the-job\" class=\"wp-block-heading\">4140 \ub610\ub294 \uacf5\uad6c\uac15? \uc6a9\ub3c4\uc5d0 \ub9de\ub294 \uc7ac\uc9c8 \uc120\ud0dd\ud558\uae30<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4140\uac15\uacfc \uacf5\uad6c\uac15\uc740 \uacbd\ub3c4 \ubc94\uc704\uac00 \uc77c\ubd80 \uacb9\uce58\uae30 \ub54c\ubb38\uc5d0 \uac00\uaca9\ub9cc \ubcf4\uace0 \ud558\ub098\ub97c \ub2e4\ub978 \ud558\ub098\ub85c \ub300\uccb4\ud558\uace0 \uc2f6\uc740 \uc720\ud639\uc774 \uc0dd\uae41\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc62c\ubc14\ub978 \uc120\ud0dd\uc740 \ubd80\ud488\uc774 \uc2e4\uc81c\ub85c \uacac\ub38c\uc57c \ud558\ub294 \ud658\uacbd\uc5d0 \ub2ec\ub824 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc808\uc0ad\uc774\ub098 \ub9c8\ubaa8\ubcf4\ub2e4\ub294 \ud558\uc911\uacfc \ud53c\ub85c\ub97c \uacac\ub38c\uc57c \ud558\ub294 \ubd80\ud488\uc5d0\ub294 4140\uac15\uc774 \ub354 \ub098\uc740 \uc120\ud0dd\uc785\ub2c8\ub2e4. \uc0e4\ud504\ud2b8, \uae30\uc5b4, \uc544\ubc84, \ud640\ub354, \ubcfc\uc2a4\ud130, \uad6c\uc870 \uae30\uacc4 \ubd80\ud488 \ub4f1\uc774 \uc5ec\uae30\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4. 4140\uac15\uc740 \uacf5\uad6c\uac15\ubcf4\ub2e4 \uac15\uc131\uc774 \ub6f0\uc5b4\ub098\uace0 \uac00\uaca9\ub3c4 \ud6e8\uc52c \uc800\ub834\ud558\uba70, \uc6a9\uc811\ub3c4 \ub354 \uc6a9\uc774\ud558\uace0(\uc608\uc5f4 \ubc0f \uc6a9\uc811 \ud6c4 \uc5f4\ucc98\ub9ac \ud544\uc694), \ub2e4\uc591\ud55c \ud06c\uae30\uc640 \ud615\ud0dc\ub85c \uc81c\uacf5\ub429\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uadf9\ud55c\uc758 \ub0b4\ub9c8\ubaa8\uc131\uacfc 58HRC \uc774\uc0c1\uc758 \uacbd\ub3c4\uac00 \uc694\uad6c\ub418\uc9c0 \uc54a\ub294 \uacbd\uc6b0\uc5d0\ub294 \uacf5\uad6c\uac15\uc5d0 \ube44\uc6a9\uc744 \ud22c\uc790\ud560 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uacf5\uad6c\uac15\uc740 \ub9c8\ubaa8, \ub0a0 \uc720\uc9c0\ub825, \ub610\ub294 \uc5f4\ub85c \uc778\ud55c \uace0\uc7a5 \ubc1c\uc0dd \uc2dc \uc801\ud569\ud55c \ud574\uacb0\ucc45\uc785\ub2c8\ub2e4. 4140\uac15\uc740 \uace0\ud0c4\uc18c\uac15\ub9cc\ud07c \uc808\uc0ad\ub0a0\uc744 \uc798 \uc720\uc9c0\ud558\uc9c0 \ubabb\ud558\uace0 \uc5f0\ub9c8\uc7ac \ub9c8\ubaa8\uc5d0 \ub300\ud55c \uc800\ud56d\ub825\ub3c4 \ub5a8\uc5b4\uc9c0\uba70, \uc57d 400\u00b0C \uc774\uc0c1\uc5d0\uc11c\ub294 \uac15\ub3c4\uac00 \uae09\uaca9\ud788 \uc800\ud558\ub429\ub2c8\ub2e4. \ub2e4\uc74c \uc138 \uac00\uc9c0 \uc0ac\ud56d\uc744 \uba85\ud655\ud788 \uad6c\ubd84\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc808\uc0ad \ubc0f \ube14\ub7ad\ud0b9 \uacf5\uad6c<\/strong> 4140\uc5d0\ub294 \uc5c6\ub294 \uacbd\ub3c4(60 HRC \uc774\uc0c1)\uc640 \ud0c4\ud654\ubb3c \ud568\ub7c9\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. D2 \ub610\ub294 A2\ub294 \ub9c8\ubaa8 \uae08\ud615\uc5d0\uc11c \ud6e8\uc52c \ub354 \uc624\ub798 \uc9c0\uc18d\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uace0\uc628 \uc791\uc5c5\uc6a9 \uacf5\uad6c\uac00 \uc57d 400\u00b0C \uc774\uc0c1\uc5d0\uc11c \uc791\ub3d9 \uc911<\/strong> H13 \ub4f1\uae09\uc758 \uace0\uc628 \uacbd\ub3c4\uac00 \ud544\uc694\ud55c\ub370, 4140\uc740 \uc774\ub7ec\ud55c \ud2b9\uc131\uc774 \uc804\ud600 \uc5c6\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>58HRC \uc774\uc0c1\uc758 \uacbd\ub3c4\ub97c \uacac\ub38c\uc57c \ud558\ub294 \ubaa8\ub4e0 \ubd80\ud488<\/strong> \uc2e4\uc81c \ub2e8\uba74\uc5d0\uc11c\ub294 \ub2e8\uba74 \ud06c\uae30 \uaddc\uce59\uc5d0 \ub530\ub77c 4140\uc740 \ud574\ub2f9 \uacbd\ub3c4\uc5d0 \uc548\uc815\uc801\uc73c\ub85c \ub3c4\ub2ec\ud560 \uc218 \uc5c6\uc73c\ubbc0\ub85c \uc81c\uc678\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\uc7ac\uc0b0<\/td><td>4140<\/td><td><a href=\"https:\/\/aobosteel.com\/ko\/d2-tool-steel\/\">\ub5142<\/a><\/td><td><a href=\"https:\/\/aobosteel.com\/ko\/h13-tool-steel\/\">H13<\/a><\/td><td><a href=\"https:\/\/aobosteel.com\/ko\/a2-tool-steel\/\">A2<\/a><\/td><\/tr><tr><td>\ucd5c\ub300 \uacbd\ub3c4(\uc2e4\uc81c)<\/td><td>~50\u201355 HRC<\/td><td>58\u201362 HRC<\/td><td>44\u201352 HRC<\/td><td>57\u201362 HRC<\/td><\/tr><tr><td>\ub0b4\ub9c8\ubaa8\uc131<\/td><td>\ub0ae\uc740<\/td><td>\ud6cc\ub96d\ud55c<\/td><td>\ubcf4\ud1b5\uc758<\/td><td>\uc88b\uc740<\/td><\/tr><tr><td>\uace0\uc628 \uacbd\ub3c4<\/td><td>\ub0ae\uc74c (400\u00b0C \ubbf8\ub9cc)<\/td><td>\ub0ae\uc740<\/td><td>\ub6f0\uc5b4\ub09c \ub0b4\uc5f4\uc131 (\ucd5c\ub300 \uc57d 600\u00b0C)<\/td><td>\ub0ae\uc740<\/td><\/tr><tr><td>\uac15\uc778\ud568<\/td><td>\uc88b\uc740<\/td><td>\ubcf4\ud1b5\uc758<\/td><td>\uc88b\uc740<\/td><td>\ubcf4\ud1b5\uc758<\/td><\/tr><tr><td>\uc0c1\ub300\uc801 \ube44\uc6a9<\/td><td>\ub0ae\uc740<\/td><td>\ub192\uc740<\/td><td>\ub192\uc740<\/td><td>\uc911\uc0c1<\/td><\/tr><tr><td>\ud0c4\ud654\ubb3c \ubd80\ud53c<\/td><td>\uc5c6\uc74c<\/td><td>\ub192\uc740 (\ud06c\ub86c \ud0c4\ud654\ubb3c)<\/td><td>\ub0ae\uc74c(\ud569\uae08 \ud0c4\ud654\ubb3c)<\/td><td>\uc911\uac04 \uc815\ub3c4 (\ud06c\ub86c \ud0c4\ud654\ubb3c)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"h-standards-and-references\" class=\"wp-block-heading\">\ud45c\uc900 \ubc0f \ucc38\uace0 \uc790\ub8cc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4140 \ubc0f \uadf8\uc640 \ub3d9\ub4f1\ud55c \uac15\uc885\uc740 SAE J404(\ud654\ud559 \uc870\uc131), ASTM A29\/A29M(\ubd09 \uc77c\ubc18 \uc694\uad6c\uc0ac\ud56d) \ubc0f EN 10083-3(42CrMo4, \ub2f4\uae08\uc9c8 \ubc0f \ud15c\ud37c\ub9c1 \ucc98\ub9ac\ub41c \ud569\uae08\uac15)\uc758 \uaddc\uc815\uc744 \ub530\ub985\ub2c8\ub2e4. \uc778\uc99d\ub41c \uae30\uacc4\uc801 \ud2b9\uc131\uc740 \ud56d\uc0c1 \uba85\uc2dc\ub41c \ud45c\uc900 \ubc0f \ub2e8\uba74 \ud06c\uae30\uc640 \uc5f0\uad00\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/aobosteel.com\/ko\/4140-vs-h13\/\">4140 \uacf5\uad6c\uac15 vs H13 \uacf5\uad6c\uac15<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/ko\/d2-steel-vs-4140\/\">4140 vs D2 \uacf5\uad6c\uac15<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/ko\/what-is-tool-steel\/\">\uacf5\uad6c\uac15\uc774\ub780 \ubb34\uc5c7\uc778\uac00<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/\">\uacf5\uad6c\uac15 \ub4f1\uae09 \uc120\ud0dd \uac00\uc774\ub4dc<\/a><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-yoast-seo-related-links yoast-seo-related-links\"><\/ul>","protected":false},"excerpt":{"rendered":"<p>4140 Steel: Properties, Hardness, and Heat Treatment What Is 4140 Steel? 4140 is a medium-carbon chromium-molybdenum alloy steel (AISI\/SAE 4140) and one of the most widely used engineering steels. Roughly 0.40% carbon, 1% chromium, and 0.2% molybdenum give it a strong balance of strength, toughness, and hardenability, allowing a single grade to cover a wide [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16021,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","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":"disabled","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":""},"categories":[22],"tags":[],"class_list":["post-16020","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - 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