{"id":14816,"date":"2026-04-25T23:14:18","date_gmt":"2026-04-25T15:14:18","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=14816"},"modified":"2026-07-25T10:49:02","modified_gmt":"2026-07-25T02:49:02","slug":"d2-steel-hardness","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/d2-steel-hardness\/","title":{"rendered":"D2\uac15 \uacbd\ub3c4: 58~60 HRC \ubc94\uc704 \ubc0f \ud15c\ud37c\ub9c1"},"content":{"rendered":"

D2\uac15\uc758 \uacbd\ub3c4: \uc5b4\ub5a4 HRC \uac12\uc744 \uc0ac\uc6a9\ud574\uc57c \ud560\uae4c\uc694?<\/h1>\n\n\n\n

\ucd5c\uc801\uc758 \uacbd\ub3c4\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. D2 \uacf5\uad6c\uac15<\/a> D2\uac15\uc758 \uacbd\ub3c4\ub294 \uc77c\ubc18\uc801\uc73c\ub85c 58~60 HRC\uc785\ub2c8\ub2e4. \ub2f4\uae08\uc9c8 \ud6c4 D2\uac15\uc740 \uc57d 64~65 HRC\uae4c\uc9c0 \ub3c4\ub2ec\ud560 \uc218 \uc788\uc9c0\ub9cc, \uc774 \ucd5c\ub300 \uacbd\ub3c4\ub294 \ub300\ubd80\ubd84\uc758 \ub0c9\uac04 \uac00\uacf5 \uacf5\uad6c\uc5d0 \uc0ac\uc6a9\ud558\uae30\uc5d0\ub294 \ub108\ubb34 \ucde8\uc131\uc774 \uac15\ud569\ub2c8\ub2e4. \uc2e4\uc81c \uc801\uc6a9 \ubd84\uc57c\uc5d0\uc11c\ub294 \ub9c8\ubaa8, \ud30c\uc190, \uade0\uc5f4 \ub610\ub294 \ubcc0\ud615\uacfc \uac19\uc740 \uc8fc\uc694 \ud30c\uc190 \ubaa8\ub4dc\ub97c \uae30\uc900\uc73c\ub85c D2\uac15\uc758 \uacbd\ub3c4\ub97c \uc120\ud0dd\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

D2\uac15 \uacbd\ub3c4 \uac04\ub7b5 \uc815\ubcf4<\/h2>\n\n\n\n
\uc0c1\ud0dc<\/th>\uacbd\ub3c4<\/th><\/tr><\/thead>
\uc5b4\ub2d0\ub9c1 \uacbd\ub3c4<\/td>217-255 HB<\/td><\/tr>
\uc77c\ubc18\uc801\uc778 \uc791\uc5c5 \uacbd\ub3c4<\/td>58-60 HRC<\/td><\/tr>
\uc2e4\uc81c \uc791\uc5c5 \ubc94\uc704<\/td>54-64 HRC<\/td><\/tr>
\ub2f4\uae08\uc9c8 \ud6c4 \ucd5c\ub300 \uacbd\ub3c4<\/td>64-65 HRC<\/td><\/tr>
\uadf9\uc800\uc628 \ucc98\ub9ac\ub85c \ucd5c\ub300 \uacbd\ub3c4 \ud655\ubcf4<\/td>\ucd5c\ub300 \uc57d 66~67 HRC\uae4c\uc9c0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\uc2e4\uc81c \uacf5\uad6c \uc81c\uc791\uc5d0\uc11c D2\uac15\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ucd5c\ub300 \uacbd\ub3c4 \uc774\ud558\ub85c \uc5f4\ucc98\ub9ac\ub429\ub2c8\ub2e4. \uac00\uc7a5 \ud754\ud558\uace0 \uc548\uc815\uc801\uc778 \uc791\uc5c5 \ubc94\uc704\ub294 58~60 HRC\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

D2\uac15\uc758 \uc2e4\uc81c \uac00\uacf5\uacbd\ub3c4\ub294 \uc5bc\ub9c8\uc785\ub2c8\uae4c?<\/h2>\n\n\n\n

D2\uac15\uc758 \uc2e4\uc81c \uc0ac\uc6a9\uacbd\ub3c4\ub294 \ub9c8\ubaa8, \ud30c\uc190, \uade0\uc5f4 \ub610\ub294 \ubcc0\ud615\uacfc \uac19\uc740 \uc8fc\uc694 \ud30c\uc190 \ubaa8\ub4dc\ub97c \uae30\uc900\uc73c\ub85c \uc120\ud0dd\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \ubc0f \uacf5\ub7ad \ucc98\ub9ac \ud6c4, D2\ub294 \uc57d 64~65 HRC\uc758 \uacbd\ub3c4\ub97c \ub2ec\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc774\ucc98\ub7fc \ub2f4\uae08\uc9c8 \uc9c1\ud6c4\uc758 \uad6c\uc870\ub294 \uc2e4\uc81c \uacf5\uad6c \uc0ac\uc6a9\uc5d0\ub294 \ub108\ubb34 \ucde8\uc131\uc774 \uac15\ud558\ubbc0\ub85c \uc0ac\uc6a9 \uc804\uc5d0 \ud15c\ud37c\ub9c1 \ucc98\ub9ac\uac00 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub300\ubd80\ubd84\uc758 \ub0c9\uac04 \uac00\uacf5 \uacf5\uad6c\uc758 \uacbd\uc6b0 58~60 HRC\uac00 \uac00\uc7a5 \uc548\uc804\ud55c \uae30\ubcf8 \ubc94\uc704\uc785\ub2c8\ub2e4. \uc774 \ubc94\uc704\ub294 D2\uac15\uc758 \ub0b4\ub9c8\ubaa8\uc131\uc744 \ucda9\ubd84\ud788 \uc720\uc9c0\ud558\uba74\uc11c \ucde8\uc131 \ubaa8\uc11c\ub9ac \ud30c\uc190 \uc704\ud5d8\uc744 \uc904\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n\n\n\n

\uacbd\ub3c4\uac00 \uc57d 62 HRC\ub97c \ucd08\uacfc\ud558\uba74 D2\uac15\uc740 \ud2b9\ud788 \ub0a0\uce74\ub85c\uc6b4 \ubaa8\uc11c\ub9ac, \uc587\uc740 \ub2e8\uba74, \ubd80\uc2e4\ud55c \uc9c0\uc9c0 \ub610\ub294 \ucda9\uaca9 \ud558\uc911\uc774 \uac00\ud574\uc9c0\ub294 \uacf5\uad6c\uc5d0\uc11c \ubaa8\uc11c\ub9ac \ud30c\uc190 \ubc0f \uade0\uc5f4\uc774 \ubc1c\uc0dd\ud558\uae30 \uc26c\uc6cc\uc9d1\ub2c8\ub2e4. \uacbd\ub3c4\uac00 \uc57d 58 HRC \uc774\ud558\ub85c \ub5a8\uc5b4\uc9c0\uba74 \ub0b4\ub9c8\ubaa8\uc131\uc740 \uae09\uaca9\ud788 \uc800\ud558\ub418\uc9c0\ub9cc \uc778\uc131 \ud5a5\uc0c1\uc740 \uc81c\ud55c\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

This behavior comes from D2\u2019s high volume of chromium-rich carbides. These carbides provide strong abrasion resistance, but they also create stress concentrations within the steel. Reducing hardness cannot remove this carbide-related brittleness. If the tool repeatedly fails by cracking, the solution may be better tool design, improved heat treatment, or a tougher steel grade, not simply lower hardness.<\/p>\n\n\n\n

\uc801\uc6a9 \ubd84\uc57c\ubcc4 D2\uac15 \uacbd\ub3c4<\/h2>\n\n\n\n

\uc544\ub798 \ud45c\ub294 \uc77c\ubc18\uc801\uc778 D2 \uc801\uc6a9 \ubd84\uc57c\uc640 \uc2e4\uc81c \uacbd\ub3c4 \ubaa9\ud45c, \uadf8\ub9ac\uace0 \uac01 \uc120\ud0dd\uacfc \uad00\ub828\ub41c \uc8fc\uc694 \uace0\uc7a5 \uc704\ud5d8\uc744 \uc5f0\uacb0\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc720\ud615<\/th>\uad8c\uc7a5 \uacbd\ub3c4<\/th>\uacf5\ud559\uc801 \uc774\uc720<\/th><\/tr><\/thead>
\ube14\ub7ad\ud0b9, \uc2a4\ud0ec\ud551 \ubc0f \uc804\ub2e8<\/td>58-62 HRC<\/td>\ub0a0\uce74\ub85c\uc6c0\uc744 \uc720\uc9c0\ud558\uace0 \uacf5\uad6c \uc218\uba85\uc744 \uc5f0\uc7a5\ud569\ub2c8\ub2e4.<\/td><\/tr>
\ub0c9\uac04 \uc555\ucd9c \ubc0f \ud5e4\ub529<\/td>60-62 HRC<\/td>\uace0\ud558\uc911 \uc870\uac74\uc5d0\uc11c\ub3c4 \uc555\ucd95 \uac15\ub3c4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/td><\/tr>
\uc2ec\uac00\uacf5 \ubc0f \uace0\ub9c8\ucc30 \uc2ac\ub77c\uc774\ub529<\/td>62-64 HRC<\/td>\ucda9\uaca9\uc774 \uc57d\ud560 \ub54c \ub9c8\ubaa8 \ubc0f \uae01\ud798 \uc800\ud56d\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.<\/td><\/tr>
\uc8fc\ubb3c \ubc0f \uc591\uac01<\/td>58-62 HRC<\/td>\ud45c\uba74 \ub9c8\ubaa8 \uc800\ud56d\uc131\uacfc \uade0\uc5f4 \uc800\ud56d\uc131\uc758 \uade0\ud615\uc744 \ub9de\ucda5\ub2c8\ub2e4.<\/td><\/tr>
\ub864\ub9c1 \ubc0f \uc2e4 \uac10\uae30<\/td>58-60 HRC<\/td>\uc9c0\uc18d\uc801\uc778 \uc811\ucd09 \ud658\uacbd\uc5d0\uc11c \uc548\uc815\uc801\uc778 \ub9c8\ubaa8\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/td><\/tr>
\ucda9\uaca9\uc5d0 \ucde8\uc57d\ud55c \uc791\uc5c5 \ub3c4\uad6c<\/td>56-58 HRC<\/td>\ub354 \uc2ec\ud55c \ud558\uc911 \uc870\uac74\uc5d0\uc11c \ucde8\uc131 \ud30c\uad34 \uc704\ud5d8\uc744 \uc904\uc785\ub2c8\ub2e4.<\/td><\/tr>
\uad6c\uc870 \ub610\ub294 \uc9c0\uc9c0 \uad6c\uc131 \uc694\uc18c<\/td>54-56 HRC<\/td>\ud558\uc911 \ud761\uc218 \ubc0f \uc9c0\uc9c0 \uac15\ub3c4\ub97c \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\uc2ec\uac00\uacf5 \ubc0f \uace0\ub9c8\ucc30 \uc2ac\ub77c\uc774\ub529 \uacf5\uc815\uc5d0\uc11c\ub294 \ucda9\uaca9\uc774 \uc801\uace0 \uacf5\uad6c\uac00 \uc548\uc815\uc801\uc73c\ub85c \uc9c0\uc9c0\ub418\ub294 \uacbd\uc6b0\uc5d0\ub9cc 62-64 HRC \uacbd\ub3c4\ub97c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774 \ubc94\uc704\uc758 \uacbd\ub3c4\ub294 \uc2ac\ub77c\uc774\ub529 \ub9c8\ubaa8 \uc800\ud56d\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uc9c0\ub9cc \uade0\uc5f4 \ubc1c\uc0dd\uc5d0 \ub300\ud55c \uc548\uc804 \uc5ec\uc720\ub97c \uac10\uc18c\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ubd88\ud655\uc2e4\ud55c \uc6a9\ub3c4\uc5d0\uc11c\ub294 D2 \uac15\uc7ac\ub97c 62 HRC \uc774\uc0c1\uc73c\ub85c \ub192\uc774\ub294 \uac83\ubcf4\ub2e4 58-60 HRC\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc77c\ubc18\uc801\uc73c\ub85c \ub354 \uc548\uc804\ud569\ub2c8\ub2e4. \ub610\ud55c D2 \uac15\uc7ac\ub294 \ub0b4\ub9c8\ubaa8\uc131\uc774 \uc720\uc6a9\ud55c \uc778\uc131\uc744 \uc5bb\ub294 \uc18d\ub3c4\ubcf4\ub2e4 \ub354 \ube60\ub974\uac8c \uc800\ud558\ub418\ubbc0\ub85c \ub0ae\uc740 \uacbd\ub3c4\ub294 \uc2e0\uc911\ud558\uac8c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

D2 \uacbd\ub3c4\uc640 \ud15c\ud37c\ub9c1 \uc628\ub3c4 \uac04\uc758 \uad00\uacc4<\/h2>\n\n\n\n

\uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \ubc0f \uacf5\ub7ad \ucc98\ub9ac \ud6c4, D2\ub294 \uc57d 64-65 HRC\uc758 \uacbd\ub3c4\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud15c\ud37c\ub9c1\uc744 \ud1b5\ud574 \uc774 \ucde8\uc131\uc774 \uac15\ud55c \uace0\uacbd\ub3c4 \uad6c\uc870\ub294 \uacf5\uad6c\ub85c \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc0c1\ud0dc\ub85c \ubcc0\ud658\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc77c\ubc18 \ud0c4\uc18c\uac15\uacfc\ub294 \ub2ec\ub9ac D2\uac15\uc740 \ud15c\ud37c\ub9c1 \uc628\ub3c4\uac00 \uc62c\ub77c\uac04\ub2e4\uace0 \ud574\uc11c \ub2e8\uc21c\ud788 \uc5f0\ud654\ub418\ub294 \uac83\uc774 \uc544\ub2d9\ub2c8\ub2e4. \ub192\uc740 \ud569\uae08 \ud568\ub7c9 \ub54c\ubb38\uc5d0 D2\uac15\uc740 \uace0\uc628 \ud15c\ud37c\ub9c1 \ubc94\uc704\uc5d0\uc11c 2\ucc28 \uacbd\ud654 \ud604\uc0c1\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud15c\ud37c\ub9c1 \uc628\ub3c4<\/th>\ub300\ub7b5\uc801\uc778 \uacbd\ub3c4<\/th>\ud575\uc2ec \ud6a8\uacfc<\/th><\/tr><\/thead>
\uae09\ub7ad<\/td>64-65 HRC<\/td>\ucd5c\ub300 \uacbd\ub3c4, \ub192\uc740 \uc751\ub825, \ubd88\uc548\uc815\ud55c \uad6c\uc870<\/td><\/tr>
200\ub3c4<\/td>60-61 HRC<\/td>\uc751\ub825 \ud574\uc18c\uac00 \uc2dc\uc791\ub418\uace0, \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \ud568\ub7c9\uc740 \ube44\uad50\uc801 \ub192\uc740 \uc218\uc900\uc744 \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/td><\/tr>
300\ub3c4<\/td>58-59 HRC<\/td>\ucd08\uae30 \uc5f0\ud654\uac00 \uc2dc\uc791\ub429\ub2c8\ub2e4<\/td><\/tr>
400-430\u00b0C<\/td>\uc57d 57 HRC<\/td>2\ucc28 \uacbd\ud654 \uc804 \ucd5c\uc800 \uacbd\ub3c4<\/td><\/tr>
480-520\u00b0C<\/td>58-60 HRC<\/td>2\ucc28 \uacbd\ud654 \ubc94\uc704, \uad6c\uc870\uc801 \uc548\uc815\uc131 \ud5a5\uc0c1<\/td><\/tr>
540\u00b0C \uc774\uc0c1<\/td>HRC 57 \ubbf8\ub9cc<\/td>\uacfc\ub3c4\ud55c \uc5f4\ucc98\ub9ac\uac00 \uc2dc\uc791\ub418\uba74 \uac15\ub3c4\uac00 \uac10\uc18c\ud569\ub2c8\ub2e4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\uc774 \uac12\ub4e4\uc740 \uc77c\ubc18\uc801\uc778 \ucc38\uace0\uce58\uc785\ub2c8\ub2e4. \uc2e4\uc81c \uacbd\ub3c4\ub294 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ud654 \uc628\ub3c4, \uc720\uc9c0 \uc2dc\uac04, \ub2e8\uba74 \ud06c\uae30, \ub2f4\uae08\uc9c8 \ubc29\ubc95 \ubc0f \ud15c\ud37c\ub9c1 \uc8fc\uae30 \ub4f1\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

D2 \uacf5\uad6c\uac15\uc758 \uc5f4\ucc98\ub9ac \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uace0 \uc2f6\uc73c\uc2dc\uba74 \ub2e4\uc74c\uc744 \ucc38\uc870\ud558\uc2ed\uc2dc\uc624. D2 \uacf5\uad6c\uac15 \uc5f4\ucc98\ub9ac \uac00\uc774\ub4dc<\/a>.<\/p>\n\n\n\n

2\ucc28 \uacbd\ud654\ub294 \uc548\uc815\uc801\uc778 \uc791\ub3d9 \ubc94\uc704\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/h2>\n\n\n\n

D2 \ud569\uae08\uc744 480~520\u00b0C\uc5d0\uc11c \ud15c\ud37c\ub9c1\ud558\uba74 \uacbd\ub3c4\uac00 \uacc4\uc18d \ub5a8\uc5b4\uc9c0\ub294 \ub300\uc2e0 \ub2e4\uc2dc \uc0c1\uc2b9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ud569\uae08 \ud0c4\ud654\ubb3c\uc774 \uc11d\ucd9c\ub418\uace0 \ud15c\ud37c\ub9c1 \uacfc\uc815\uc5d0\uc11c \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \ub354\uc6b1 \ud6a8\uacfc\uc801\uc73c\ub85c \uc81c\uc5b4\ub418\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc774 \ubc94\uc704\uc758 \uac00\uce58\ub294 \ub2e8\uc21c\ud788 \uacbd\ub3c4\ubfd0\ub9cc \uc544\ub2c8\ub77c \uad6c\uc870\uc801 \uc548\uc815\uc131\uacfc\ub3c4 \uad00\ub828\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc801\uc808\ud558\uac8c \uc5f4\ucc98\ub9ac\ub41c 58~60 HRC\uc758 D2 \uacf5\uad6c\ub294 \uc2e4\uc81c \uc0dd\uc0b0 \ud658\uacbd\uc5d0\uc11c \ub354 \ub2e8\ub2e8\ud558\uc9c0\ub9cc \uc548\uc815\uc131\uc774 \ub5a8\uc5b4\uc9c0\ub294 \uacf5\uad6c\ubcf4\ub2e4 \uc6b0\uc218\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uc81c\uc5b4<\/h2>\n\n\n\n

\uc57d 200\u00b0C\uc758 \uc800\uc628 \ud15c\ud37c\ub9c1\uc740 \ub192\uc740 \uacbd\ub3c4\ub97c \uc720\uc9c0\ud560 \uc218 \uc788\uc9c0\ub9cc, \uad6c\uc870 \ub0b4\uc5d0 \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \ub354 \ub9ce\uc774 \ub0a8\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uc0ac\uc6a9 \uc911 \uce58\uc218 \ubd88\uc548\uc815\uc131\uc744 \uc720\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc57d 500\u00b0C\uc758 \uace0\uc628 \ud15c\ud37c\ub9c1\uc740 \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub97c \uac10\uc18c\uc2dc\ud0a4\uace0 \uc548\uc815\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4. \uba85\ubaa9\uc0c1 \uacbd\ub3c4\ub294 \uc57d\uac04 \ub0ae\uc544\uc9c8 \uc218 \uc788\uc9c0\ub9cc, \uacf5\uad6c\ub294 \ubd88\uc548\uc815\ud55c \ubcc0\ud0dc, \uade0\uc5f4 \ubc0f \ubcc0\ud615\uc5d0 \ub35c \ucde8\uc57d\ud574\uc9d1\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc774\uc911 \ub2f4\uae08\uc9c8\uc774 \uc911\uc694\ud55c \uc774\uc720<\/h2>\n\n\n\n

D2 \ud569\uae08\uc744 2\ucc28 \uacbd\ud654 \ubc94\uc704\uc5d0\uc11c \ud15c\ud37c\ub9c1\ud560 \ub54c, \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub294 \ub0c9\uac01 \uacfc\uc815\uc5d0\uc11c \uc0c8\ub85c\uc6b4 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub85c \ubcc0\ud0dc\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub807\uac8c \uc0c8\ub85c \ud615\uc131\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub294 \ud15c\ud37c\ub9c1\ub418\uc9c0 \uc54a\uc740 \uc0c1\ud0dc\ub85c \ub0a8\uc544 \uc788\uc73c\uba74 \ucde8\uc131\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc774\ub7ec\ud55c \uc774\uc720\ub85c D2\uac15\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \uc774\uc911 \uc5f4\ucc98\ub9ac\ub97c \uac70\uce69\ub2c8\ub2e4. \uccab \ubc88\uc9f8 \uc5f4\ucc98\ub9ac\ub294 \uad6c\uc870\ub97c \ubcc0\ud615\uc2dc\ud0a4\uace0 \uc548\uc815\ud654\ud558\ub294 \ub370 \ub3c4\uc6c0\uc744 \uc8fc\uace0, \ub450 \ubc88\uc9f8 \uc5f4\ucc98\ub9ac\ub294 \uc0c8\ub85c \ud615\uc131\ub41c \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc758 \uc751\ub825\uc744 \uc644\ud654\ud569\ub2c8\ub2e4. \ub9ce\uc740 \uacf5\uad6c \uc81c\uc791 \uc6a9\ub3c4\uc5d0\uc11c \uc774\ub7ec\ud55c \ucc98\ub9ac\ub97c \ud1b5\ud574 58~60 HRC\uc758 \uc548\uc815\uc801\uc778 \uac00\uacf5 \uacbd\ub3c4\ub97c \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

D2\uac15\uc758 \uc5b4\ub2d0\ub9c1 \ud6c4 \uacbd\ub3c4 \ubc0f \uac00\uacf5 \ud2b9\uc131<\/h2>\n\n\n\n

D2 \uacf5\uad6c\uac15\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \uc5b4\ub2d0\ub9c1 \ucc98\ub9ac\ub41c \uc0c1\ud0dc\ub85c \uacf5\uae09\ub418\uba70, \uacbd\ub3c4\ub294 217~255 HB\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0c1\ud0dc\uc5d0\uc11c\ub294 \uae30\uacc4 \uac00\uacf5, \ubc00\ub9c1, \ub4dc\ub9b4\ub9c1, \uc5f0\uc0ad, \ud45c\uba74 \ucc98\ub9ac \ubc0f \uae30\ud0c0 \uc0ac\uc804 \uacbd\ud654 \uc791\uc5c5\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc5b4\ub2d0\ub9c1 \ucc98\ub9ac\ub41c \uc0c1\ud0dc\uc5d0\uc11c\ub3c4 D2\ub294 \ub2e8\ub2e8\ud55c \ud06c\ub86c \uce74\ubc14\uc774\ub4dc \uc131\ubd84\uc774 \uc808\uc0ad \uacf5\uad6c\ub97c \uacc4\uc18d \ub9c8\ubaa8\uc2dc\ud0a4\uae30 \ub54c\ubb38\uc5d0 \uac00\uacf5\uc774 \uc5b4\ub835\uc2b5\ub2c8\ub2e4. O1\uacfc \uac19\uc740 \uc800\ud569\uae08 \uacf5\uad6c\uac15\uacfc \ube44\uad50\ud588\uc744 \ub54c, D2\ub294 \uacf5\uad6c \ub9c8\ubaa8\ub97c \ube60\ub974\uac8c \ud558\uace0 \uc808\uc0ad \uc18d\ub3c4\ub97c \ub2a6\ucd94\uba70 \ub9c8\ubb34\ub9ac \uac00\uacf5 \ube44\uc6a9\uc744 \uc99d\uac00\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n\n\n\n

D2\uac15\uc758 \uac00\uacf5\uc131\uc740 \ube44\uad50 \uae30\uc900\uc5d0 \ub530\ub77c \uc77c\ubc18\uc801\uc73c\ub85c 30~45%\ub85c \ud3c9\uac00\ub429\ub2c8\ub2e4. \ubaa8\ub4e0 \uc8fc\uc694 \uac00\uacf5 \uc791\uc5c5\uc740 \uacbd\ud654 \ucc98\ub9ac \uc804\uc5d0 \uc644\ub8cc\ud574\uc57c \ud569\ub2c8\ub2e4. D2\uac15\uc774 \uacbd\ud654\ub418\uba74 \uc77c\ubc18\uc801\uc778 \uae30\uacc4 \uac00\uacf5\uc740 \ube44\uc2e4\uc6a9\uc801\uc774 \ub418\uba70, \ub9c8\ubb34\ub9ac \uc791\uc5c5\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \uc5f0\uc0ad, \ubc29\uc804 \uac00\uacf5(EDM), \uc5f0\ub9c8 \ub610\ub294 \uae30\ud0c0 \uacbd\ud654 \ud6c4 \uacf5\uc815\uc73c\ub85c \uc81c\ud55c\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc77c\ubd80 \uacf5\uae09\uc5c5\uccb4\ub294 D2 \uac15\uc7ac\uc758 \ud669 \uac15\ud654 \uac00\uacf5\uc131 \ubcc0\ud615 \uc81c\ud488\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ub4f1\uae09\uc740 \ubbf8\uc138\ud55c \ud669\ud654\ubb3c \uac1c\uc7ac\ubb3c\uc744 \ud568\uc720\ud558\uc5ec \uce69 \ud30c\uc1c4 \ubc0f \ud45c\uba74 \uc870\ub3c4\ub97c \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc774\ub7ec\ud55c \uc81c\ud488\uc740 \uac00\uacf5 \ud6a8\uc728\uc774 \ucd5c\uc6b0\uc120\uc77c \ub54c\ub9cc \uc0ac\uc6a9\ub418\uba70, \uc77c\ubc18\uc801\uc778 D2 \uac15\uc7ac\uc640 \ub3d9\uc77c\ud558\uac8c \ucde8\uae09\ud574\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

D2 \uacbd\ub3c4\uac00 \uc778\uc131\uacfc \uac19\uc9c0 \uc54a\uc740 \uc774\uc720\ub294 \ubb34\uc5c7\uc77c\uae4c\uc694?<\/h2>\n\n\n\n

In D2 tool steel, increasing hardness improves wear resistance and compressive strength but reduces the steel\u2019s ability to absorb impact.<\/p>\n\n\n\n

The key point is that reducing hardness does not meaningfully turn D2 into a tough steel. D2\u2019s toughness is limited by its carbide-rich microstructure. The chromium carbides that provide excellent wear resistance also act as crack initiation sites when the tool is subjected to impact, bending stress, or sharp stress concentrations.<\/p>\n\n\n\n

\uacbd\ub3c4\uac00 \ub9e4\uc6b0 \ub192\uc744\uc218\ub85d, \ud2b9\ud788 \uc57d 62 HRC \uc774\uc0c1\uc77c \uacbd\uc6b0, D2\uac15\uc740 \ubaa8\uc11c\ub9ac \uae68\uc9d0\uacfc \ucde8\uc131 \ud30c\uad34\uc5d0 \ub354\uc6b1 \ubbfc\uac10\ud574\uc9d1\ub2c8\ub2e4. \uc815\uc0c1 \uc0ac\uc6a9 \ubc94\uc704 \uc774\ud558\uc5d0\uc11c\ub294 D2\uac15\uc740 \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc778\uc131\uc744 \uc5bb\ub294 \uc18d\ub3c4\ubcf4\ub2e4 \ub0b4\ub9c8\ubaa8\uc131\uc744 \uc783\ub294 \uc18d\ub3c4\uac00 \ub354 \ube60\ub985\ub2c8\ub2e4.<\/p>\n\n\n\n

D2 \uacf5\uad6c\uac00 \uade0\uc5f4\ub85c \uc778\ud574 \ubc18\ubcf5\uc801\uc73c\ub85c \ud30c\uc190\ub418\ub294 \uacbd\uc6b0, \ub2e8\uc21c\ud788 \uacbd\ub3c4\ub97c \ub0ae\ucd94\ub294 \uac83\ub9cc\uc73c\ub85c\ub294 \ubb38\uc81c\ub97c \ud574\uacb0\ud560 \uc218 \uc5c6\uc744 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. \ub354 \ub098\uc740 \ud574\uacb0\ucc45\uc740 \uacf5\uad6c \ud615\uc0c1 \ubcc0\uacbd, \uc5f4\ucc98\ub9ac \uac1c\uc120, \ud45c\uba74 \uc190\uc0c1 \uac10\uc18c \ub610\ub294 A2\ub098 S7\uacfc \uac19\uc740 \ub354 \uac15\ud55c \uacf5\uad6c\uac15\uc744 \uc120\ud0dd\ud558\ub294 \uac83\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

1. \ud0c4\ud654\ubb3c \uad6c\uc870\ub85c\ubd80\ud130\uc758 \uade0\uc5f4 \ubc1c\uc0dd<\/h3>\n\n\n\n

D2\ub294 \ub192\uc740 \ubd80\ud53c \ubd84\uc728\uc758 \uacbd\uc9c8 \ud06c\ub86c \uce74\ubc14\uc774\ub4dc\ub97c \ud568\uc720\ud558\uace0 \uc788\uc5b4 \ub0b4\ub9c8\ubaa8\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uc9c0\ub9cc \uc751\ub825 \uc9d1\uc911\uc810\uc73c\ub85c\ub3c4 \uc791\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uacbd\ub3c4\uac00 \uc9c0\ub098\uce58\uac8c \ub192\uc544\uc9c0\uba74 \ud0c4\ud654\ubb3c \uacbd\uacc4\uba74\uc5d0\uc11c \uade0\uc5f4\uc774 \ubc1c\uc0dd\ud558\uc5ec \uc7ac\ub8cc \uc804\uccb4\ub85c \ube60\ub974\uac8c \uc804\ud30c\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c\ub85c \uc774\ub294 \uce21\uc815\ub41c \uacbd\ub3c4\uac00 \uc815\ud655\ud574 \ubcf4\uc774\ub354\ub77c\ub3c4 \ubaa8\uc11c\ub9ac \uae68\uc9d0, \ubaa8\uc11c\ub9ac \uade0\uc5f4 \ub610\ub294 \uac11\uc791\uc2a4\ub7ec\uc6b4 \ucde8\uc131 \ud30c\uad34\ub85c \ub098\ud0c0\ub0a9\ub2c8\ub2e4.<\/p>\n\n\n\n

2. \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \ubd88\uc548\uc815\uc131<\/h3>\n\n\n\n

D2\uac15\uc774 \uc801\uc808\ud558\uac8c \ud15c\ud37c\ub9c1\ub418\uc9c0 \uc54a\uc73c\uba74 \ub2f4\uae08\uc9c8 \ud6c4\uc5d0\ub3c4 \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \uad6c\uc870 \ub0b4\uc5d0 \ub0a8\uc544 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc0ac\uc6a9, \uc5f0\uc0ad \ub610\ub294 \ubc18\ubcf5\uc801\uc778 \ud558\uc911 \uc791\uc6a9 \uc911\uc5d0 \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\uac00 \uc0c8\ub85c\uc6b4 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\ub85c \ubcc0\ud0dc\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ubcc0\ud0dc\ub294 \uad6d\ubd80\uc801\uc778 \ubd80\ud53c \ud33d\ucc3d\uc744 \uc720\ubc1c\ud558\uace0 \uc774\ubbf8 \uac15\uc131\uc774 \ub192\uc740 \uad6c\uc870 \ub0b4\ubd80\uc5d0 \ub0b4\ubd80 \uc751\ub825\uc744 \ubc1c\uc0dd\uc2dc\ud0b5\ub2c8\ub2e4. \uacb0\uacfc\uc801\uc73c\ub85c \ubbf8\uc138 \uade0\uc5f4, \uce58\uc218 \ubcc0\ud654 \ub610\ub294 \uc608\uae30\uce58 \uc54a\uc740 \uacf5\uad6c \ud30c\uc190\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

3. \uc5f0\uc0ad \ubc0f \ubc29\uc804\uac00\uacf5\uc73c\ub85c \uc778\ud55c \ud45c\uba74 \uc190\uc0c1<\/h3>\n\n\n\n

\uc5f0\uc0ad \ubc0f \ubc29\uc804 \uac00\uacf5(EDM)\uc740 \uacbd\ud654\ub41c D2 \ud569\uae08 \ud45c\uba74\uc5d0 \ud15c\ud37c\ub9c1\ub418\uc9c0 \uc54a\uc740 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8\uc758 \uc587\uc740 \uce35\uc774\ub098 \ucde8\uc131 \uc7ac\uc6a9\uc735\uce35\uc744 \uc0dd\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

This damaged layer may contain microcracks. Under working load, these microcracks can grow into larger cracks, causing premature failure. This can happen even when the tool\u2019s core hardness is correct.<\/p>\n\n\n\n

4. \uc2e4\uc6a9\uc801\uc778 \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \ud1b5\ucc30\ub825<\/h3>\n\n\n\n

\uacfc\ub3c4\ud55c \uacbd\ub3c4\ub294 \ucde8\uc131\uc744 \uc99d\uac00\uc2dc\ud0a4\uace0, \uc794\ub958 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub294 \ubd88\uc548\uc815\uc131\uc744 \uc57c\uae30\ud558\uba70, \uc190\uc0c1\ub41c \uc5f0\uc0ad \ub610\ub294 \ubc29\uc804 \uac00\uacf5 \ud45c\uba74\uc740 \uade0\uc5f4 \uc804\ud30c\ub97c \uac00\uc18d\ud654\ud569\ub2c8\ub2e4. \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 D2 \uacf5\uad6c\ub97c \uc704\ud574\uc11c\ub294 \uacbd\ub3c4 \uc81c\uc5b4, \uc801\uc808\ud55c \ud15c\ud37c\ub9c1, \uc815\ud655\ud55c \ud615\uc0c1 \ubc0f \uc138\uc2ec\ud55c \ub9c8\uac10\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

D2, A2, O1 \uacbd\ub3c4 \ube44\uad50<\/h2>\n\n\n\n

D2, A2, \ubc0f O1\uc740 \ubaa8\ub450 \uc720\uc0ac\ud55c \uacbd\ub3c4 \uc218\uc900\uc5d0\uc11c \uc791\ub3d9\ud560 \uc218 \uc788\uc9c0\ub9cc, \uc720\uc0ac\ud55c \uacbd\ub3c4\uac00 \uc720\uc0ac\ud55c \uc131\ub2a5\uc744 \uc758\ubbf8\ud558\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4.<\/p>\n\n\n\n

\uac15\ucca0<\/th>\uacf5\ud1b5 \uc791\uc5c5 \ubaa9\ud45c<\/th>\ub0b4\ub9c8\ubaa8\uc131<\/th>\uac15\uc778\ud568<\/th>\uac00\uacf5\uc131<\/th><\/tr><\/thead>
\ub5142<\/td>58-60 HRC<\/td>\ub9e4\uc6b0 \ub192\uc74c<\/td>\ub0ae\uc740<\/td>\uac00\ub09c\ud55c<\/td><\/tr>
A2<\/td>57-60 HRC<\/td>\uc911\uac04<\/td>D2\ubcf4\ub2e4 \ub192\uc74c<\/td>\ubcf4\ud1b5\uc758<\/td><\/tr>
\uc6241<\/td>57-60 HRC<\/td>\ub0ae\ucd94\ub2e4<\/td>\uc88b\uc740<\/td>\uc88b\uc740<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

D2\ub294 \ub2e4\ub7c9\uc758 \ud06c\ub86c \uce74\ubc14\uc774\ub4dc \ub355\ubd84\uc5d0 \uc6b0\uc218\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4. \uc774\ub85c \uc778\ud574 \ud2b9\ud788 \ub9c8\ubaa8\uac00 \uc2ec\ud55c \ub0c9\uac04 \uac00\uacf5 \ud658\uacbd\uc5d0\uc11c \ub6f0\uc5b4\ub09c \ub0b4\ub9c8\ubaa8\uc131\uc744 \ubcf4\uc774\uc9c0\ub9cc, \uade0\uc5f4 \ubc0f \ud30c\uc190\uc5d0\ub3c4 \ub354 \ucde8\uc57d\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

A2 contains fewer hard carbides than D2, so it does not match D2\u2019s abrasive wear resistance. However, A2 offers a better balance between wear resistance and toughness, making it more suitable for tools that experience intermittent loading or are at risk of chipping.<\/p>\n\n\n\n

O1\uc740 D2\ubcf4\ub2e4 \uac00\uacf5\uc774 \uc6a9\uc774\ud558\uace0 \uc5f0\uc131\uc774 \uc6b0\uc218\ud558\uc9c0\ub9cc \ub0b4\ub9c8\ubaa8\uc131\uc740 \ub5a8\uc5b4\uc9d1\ub2c8\ub2e4. \ub530\ub77c\uc11c \uac04\ub2e8\ud55c \uacf5\uad6c, \uc18c\ub7c9 \uc0dd\uc0b0 \ub610\ub294 \ucd5c\ub300 \ub0b4\ub9c8\ubaa8\uc131\ubcf4\ub2e4 \uac00\uacf5 \ud6a8\uc728\uc774 \ub354 \uc911\uc694\ud55c \uc6a9\ub3c4\uc5d0 \uc801\ud569\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc2e4\uc81c \uc120\ud0dd\uc5d0\uc11c \uc911\uc694\ud55c \uac83\uc740 \uc694\uad6c\ub418\ub294 \uacbd\ub3c4\ub97c \ub2ec\uc131\ud560 \uc218 \uc788\ub294 \uac15\uc7ac\ubfd0\ub9cc\uc774 \uc544\ub2d9\ub2c8\ub2e4. \uacf5\uad6c\uac00 \uc5b4\ub5a4 \ubc29\uc2dd\uc73c\ub85c \ud30c\uc190\ub420 \uac83\uc73c\ub85c \uc608\uc0c1\ub418\ub294\uc9c0 \uace0\ub824\ud558\ub294 \uac83\uc774 \ub354 \uc911\uc694\ud569\ub2c8\ub2e4. \ub9c8\ubaa8\uc5d0 \uac15\ud558\uba74 D2\ub97c, \uce69\ud551 \uc800\ud56d\uc131\uc774 \uc88b\uc73c\uba74 A2\ub97c, \ucd5c\ub300 \ub9c8\ubaa8 \uc800\ud56d\uc131\ubcf4\ub2e4 \uac00\uacf5\uc131\uacfc \ubc94\uc6a9\uc131\uc774 \ub354 \uc911\uc694\ud558\uba74 O1\uc744 \uc120\ud0dd\ud558\uc2ed\uc2dc\uc624.<\/p>","protected":false},"excerpt":{"rendered":"

D2 Steel Hardness: What HRC Should You Use? The optimal hardness for D2 tool steel is typically 58-60 HRC. Although D2 can reach about 64-65 HRC after quenching, this maximum hardness is too brittle for most cold-work tooling. In real applications, D2 hardness should be selected based on the primary failure mode: wear, chipping, cracking, or deformation. […]<\/p>\n","protected":false},"author":1,"featured_media":15004,"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":"normal-width-container","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":""},"class_list":["post-14816","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nD2 Steel Hardness: 58\u201360 HRC Range & Tempering | AoboSteel<\/title>\n<meta name=\"description\" content=\"D2 tool steel works best at 58\u201360 HRC. 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Steel Hardness: What HRC Should You Use? The optimal hardness for D2 tool steel is typically 58-60 HRC. Although D2 can reach about 64-65 HRC after quenching, this maximum hardness is too brittle for most cold-work tooling. In real applications, D2 hardness should be selected based on the primary failure mode: wear, chipping, cracking, or deformation.…","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/D2-tool-steel-hardness-ad-12x12.avif",12,12,true]},"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"D2 Steel Hardness: What HRC Should You Use? The optimal hardness for D2 tool steel is typically 58-60 HRC. Although D2 can reach about 64-65 HRC after quenching, this maximum hardness is too brittle for most cold-work tooling. In real applications, D2 hardness should be selected based on the primary failure mode: wear, chipping, cracking, or deformation.…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/14816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/comments?post=14816"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/14816\/revisions"}],"predecessor-version":[{"id":17047,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/14816\/revisions\/17047"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media\/15004"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media?parent=14816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}