{"id":14816,"date":"2026-04-25T23:14:18","date_gmt":"2026-04-25T15:14:18","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=14816"},"modified":"2026-10-19T13:30:00","modified_gmt":"2026-10-19T05:30:00","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":"

\ucd5c\uc801\uc758 D2\uac15 \uacbd\ub3c4\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95<\/h1>\n\n\n\n

\ucd5c\uc801\uc758 \uacbd\ub3c4\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.\u00a0D2 \uacf5\uad6c\uac15<\/a>\u00a0is 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, select D2 hardness based on the primary failure mode: wear, chipping, cracking, or deformation.<\/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 \uc0ac\uc6a9 \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

Select the actual working hardness of D2 steel based on the dominant failure mode: wear, chipping, cracking, or deformation.<\/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

When hardness exceeds about 62 HRC, D2 becomes more prone to edge chipping and cracking, especially in tools with sharp corners, thin sections, poor support, or impact loading. When hardness drops below about 58 HRC, wear resistance falls quickly, but toughness improves only slightly.<\/p>\n\n\n\n

\uc774\ub7ec\ud55c \ud604\uc0c1\uc740 D2\uc5d0 \ud568\uc720\ub41c \ud06c\ub86c \ud568\ub7c9\uc774 \ub192\uc740 \ud0c4\ud654\ubb3c \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ud0c4\ud654\ubb3c\uc740 \ub6f0\uc5b4\ub09c \ub0b4\ub9c8\ubaa8\uc131\uc744 \uc81c\uacf5\ud558\uc9c0\ub9cc, \uac15\ucca0 \ub0b4\ubd80\uc5d0 \uc751\ub825 \uc9d1\uc911\uc744 \uc720\ubc1c\ud558\uae30\ub3c4 \ud569\ub2c8\ub2e4. \uacbd\ub3c4\ub97c \ub0ae\ucd94\ub294 \uac83\ub9cc\uc73c\ub85c\ub294 \uc774\ub7ec\ud55c \ud0c4\ud654\ubb3c \uad00\ub828 \ucde8\uc131\uc744 \uc81c\uac70\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uacf5\uad6c\uac00 \ubc18\ubcf5\uc801\uc73c\ub85c \uade0\uc5f4\ub85c \ud30c\uc190\ub41c\ub2e4\uba74, \ub2e8\uc21c\ud788 \uacbd\ub3c4\ub97c \ub0ae\ucd94\ub294 \uac83\ubcf4\ub2e4\ub294 \uacf5\uad6c \uc124\uacc4 \uac1c\uc120, \uc5f4\ucc98\ub9ac \uac1c\uc120 \ub610\ub294 \ub354 \uac15\ud55c \uac15\uc885 \uc0ac\uc6a9\uc774 \ud574\uacb0\ucc45\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/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

For deep drawing and high-friction sliding, use 62-64 HRC only when impact is low and the tool is well supported. This range can improve sliding wear resistance but also reduce the safety margin against cracking.<\/p>\n\n\n\n

For uncertain applications, 58-60 HRC is usually safer than pushing D2 above 62 HRC. Use lower hardness carefully, because D2 loses wear resistance faster than it gains usable toughness.<\/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

When you temper D2 at 480-520C, hardness can rise again rather than continue to fall. This happens because alloy carbides precipitate, and tempering more effectively controls retained austenite.<\/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

Low-temperature tempering around 200C can maintain high hardness but may leave more retained austenite. This can create dimensional instability during service.<\/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

When you temper D2 in the secondary hardening range, retained austenite may transform into fresh martensite during cooling. This newly formed martensite is brittle if it remains untempered.<\/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 tool steel is typically supplied annealed, with a hardness of 217-255 HB. This condition allows machining, milling, drilling, grinding, preparation, and other pre-hardening operations.<\/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

Machinability is commonly rated at 30-45%, depending on the baseline used for comparison. Complete all major machining before hardening. Once D2 is hardened, conventional machining becomes impractical, and finishing operations are usually limited to grinding, EDM, polishing, or other post-hardening processes.<\/p>\n\n\n\n

Some suppliers offer sulfur-enhanced free-machining variants of D2. These grades contain fine sulfide inclusions that improve chip breaking and surface finish. However, use them only when machining efficiency is a priority, and don’t treat them as a standard D2 supply.<\/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

D2 \uacf5\uad6c\uac15\uc758 \uacbd\uc6b0, \uacbd\ub3c4\uac00 \uc99d\uac00\ud558\uba74 \ub0b4\ub9c8\ubaa8\uc131\uacfc \uc555\ucd95 \uac15\ub3c4\ub294 \ud5a5\uc0c1\ub418\uc9c0\ub9cc \ucda9\uaca9 \ud761\uc218 \ub2a5\ub825\uc740 \uac10\uc18c\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

The key point is that reducing hardness does not meaningfully turn D2 into a tough steel. D2\u2019s carbide-rich microstructure limits its toughness. The chromium carbides that provide excellent wear resistance also act as crack initiation sites under 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

If D2 is not properly tempered, retained austenite can remain after quenching.<\/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

\uc190\uc0c1\ub41c \ubd80\ubd84\uc5d0\ub294 \ubbf8\uc138 \uade0\uc5f4\uc774 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc791\ub3d9 \ud558\uc911\uc744 \ubc1b\uc73c\uba74 \uc774\ub7ec\ud55c \ubbf8\uc138 \uade0\uc5f4\uc774 \ub354 \ud070 \uade0\uc5f4\ub85c \uc131\uc7a5\ud558\uc5ec \uc870\uae30 \ud30c\uc190\uc744 \uc720\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uacf5\uad6c\uc758 \uc911\uc2ec \uacbd\ub3c4\uac00 \uc801\uc808\ud55c \uacbd\uc6b0\uc5d0\ub3c4 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/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\uc885<\/th>\uacf5\ud1b5 \uc791\uc5c5 \ubaa9\ud45c<\/th>\ub0b4\ub9c8\ubaa8\uc131<\/th>\uc778\uc131<\/th>\ud53c\uc0ad\uc131<\/th><\/tr><\/thead>
D2<\/td>58-60 HRC<\/td>\ub9e4\uc6b0 \ub192\uc74c<\/td>\ub0ae\uc740<\/td>\uac00\ub09c\ud55c<\/td><\/tr>
A2<\/td>57-60 HRC<\/td>\ub9e4\uccb4<\/td>D2\ubcf4\ub2e4 \ub192\uc74c<\/td>\ubcf4\ud1b5\uc758<\/td><\/tr>
O1<\/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 of wear resistance and toughness, making it better suited for tools that experience intermittent loading or risk chipping.<\/p>\n\n\n\n

O1 is easier to machine and more ductile than D2, but it has lower wear resistance. It suits simpler tools, shorter production runs, or applications where machining efficiency matters more than maximum abrasive wear resistance.<\/p>\n\n\n\n

In practice, the question isn’t just which steel can reach the required hardness. The more important question is how the tool is expected to fail. Choose D2 for abrasive wear, A2 for better chipping resistance, and O1 when machinability and general-purpose toughness matter more than maximum wear resistance.<\/p>","protected":false},"excerpt":{"rendered":"

How to Select the Optimal D2 Steel Hardness The optimal hardness for\u00a0D2 tool steel\u00a0is 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, select D2 hardness based on the primary failure mode: wear, chipping, cracking, or deformation. D2 Steel […]<\/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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to Select the Optimal D2 Steel Hardness The optimal hardness for\u00a0D2 tool steel\u00a0is 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, select D2 hardness based on the primary failure mode: wear, chipping, cracking, or deformation. D2 Steel…","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":"How to Select the Optimal D2 Steel Hardness The optimal hardness for\u00a0D2 tool steel\u00a0is 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, select D2 hardness based on the primary failure mode: wear, chipping, cracking, or deformation. 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