{"id":20830,"date":"2026-10-03T16:48:52","date_gmt":"2026-10-03T08:48:52","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=20830"},"modified":"2026-10-16T16:08:32","modified_gmt":"2026-10-16T08:08:32","slug":"obsolete-tool-steel-grades","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/obsolete-tool-steel-grades\/","title":{"rendered":"\ub354 \uc774\uc0c1 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 \uacf5\uad6c\uac15 \ub4f1\uae09, \uc870\uc131"},"content":{"rendered":"

\ub354 \uc774\uc0c1 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 \uacf5\uad6c\uac15 \ub4f1\uae09, \uc870\uc131<\/h1>\n\n\n\n

\uacf5\uad6c\uac15 \ub4f1\uae09\uc740 \uc77c\ubc18\uc801\uc778 \uc0c1\uc5c5\uc801 \uc774\uc720\ub85c \uc0ac\uc6a9\uc774 \uc911\ub2e8\ub429\ub2c8\ub2e4. \ud2b9\uc815 \uc720\ud615\uc5d0 \ub300\ud55c \uc218\uc694\uac00 \uac10\uc18c\ud558\uba74 \uc81c\uac15\uc18c\ub294 \uc555\uc5f0\uc744 \uc911\ub2e8\ud558\uace0, AISI\ub294 \ub9c8\uc9c0\ub9c9 \uc6a9\ud574 \uc774\ud6c4\uc5d0\ub3c4 \uc218\ub144\uac04 \ud574\ub2f9 \uba85\uce6d\uc744 \uc720\uc9c0\ud569\ub2c8\ub2e4. \uc774\ub294 \ub450 \uac00\uc9c0 \uc0c1\ud669\uc5d0\uc11c \uc911\uc694\ud569\ub2c8\ub2e4. 1980\ub144\ub300\uc5d0 \uc791\uc131\ub41c \ub3c4\uba74\uc5d0\ub294 \uc544\ubb34\ub3c4 \ud310\ub9e4\ud558\uc9c0 \uc54a\ub294 \ub4f1\uae09\uc774 \uc5ec\uc804\ud788 \uae30\uc7ac\ub418\uc5b4 \uc788\uc744 \uc218 \uc788\uc73c\uba70, \uc218\ub9ac\ub97c \uc704\ud574 \uc785\uace0\ub41c \uacf5\uad6c\uc5d0 \ud574\ub2f9 \ub4f1\uae09\uc774 \ud45c\uae30\ub418\uc5b4 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ud398\uc774\uc9c0\ub294 \ub354 \uc774\uc0c1 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 \uacf5\uad6c\uac15\uc758 \uc870\uc131\uc744 \ucd9c\ucc98\uc5d0\uc11c \ubd84\ub958\ud55c \ubc29\uc2dd\ub300\ub85c \uadf8\ub8f9\ud654\ud558\uc5ec \ub098\uc5f4\ud558\ubbc0\ub85c, \uc624\ub798\ub41c \ub3c4\uba74\uc5d0 \uae30\uc7ac\ub41c \ub4f1\uae09\uc744 \ud604\uc7ac \uc774\uc6a9 \uac00\ub2a5\ud55c \uac83\uacfc \ub300\uc870\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud45c\uc5d0 \ud3ec\ud568\ub41c \ub0b4\uc6a9<\/h2>\n\n\n\n

\uc774 \ud45c\ub294 \uacf5\uad6c\uac15 \uacc4\uc5f4 \uc911 \ud558\ub098\uac00 \uc544\ub2c8\ub77c \uc5ec\ub7ec \uacc4\uc5f4\uc5d0 \uac78\uccd0 \uc788\uc2b5\ub2c8\ub2e4. \uace0\uc18d\ub3c4\uac15, \uc5f4\uac04\uacf5\uad6c\uac15, \ub0c9\uac04\uacf5\uad6c\uac15, \ub0b4\ucda9\uaca9\uac15, \uae08\ud615\uac15, \ud2b9\uc218\ubaa9\uc801\uac15 \ubc0f \uc218\uacbd\ud654\uac15\uc774 \ubaa8\ub450 \ud3ec\ud568\ub418\ub294\ub370, \uc774\ub294 \uc5b4\ub290 \uacc4\uc5f4\uc5d0\uc11c\ub4e0 \ub4f1\uae09\uc774 \uc0ac\uc6a9 \uc911\ub2e8\ub420 \uc218 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc870\uc131 \uc5f4\uc740 \ud604\uc7ac \uc0dd\uc0b0 \uc911\uc778 \ub4f1\uae09\uc5d0 \uc0ac\uc6a9\ub418\ub294 \uac83\uacfc \ub3d9\uc77c\ud558\ubbc0\ub85c, \uc5ec\uae30\uc758 \ud589\uc744 \ud604\uc7ac \ub4f1\uae09 \ud45c\uc640 \uc9c1\uc811 \ub300\uc870\ud558\uc5ec \uc77d\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac12\uc774 \ub300\uc2dc\ub85c \ud45c\uc2dc\ub41c \uacbd\uc6b0 \ucd9c\ucc98\uc5d0\uc11c \ud574\ub2f9 \uc6d0\uc18c\uc5d0 \ub300\ud574 \uc544\ubb34\uac83\ub3c4 \uae30\uc7ac\ud558\uc9c0 \uc54a\uc740 \uac83\uc774\uba70, Others \uc5f4\uc5d0 \ud574\ub2f9 \ud589\uc758 \ub098\uba38\uc9c0 \ubd80\ubd84\uc5d0 \uc5c6\ub294 \uc6d0\uc18c\uac00 \uc788\ub294 \uacbd\uc6b0 \uadf8\uacf3\uc5d0 \ud45c\uc2dc\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc720\ud615<\/th>C<\/th>W<\/th>Mo<\/th>Cr<\/th>V<\/th>\uae30\ud0c0<\/th><\/tr><\/thead>
\uace0\uc18d\uac15<\/td><\/tr>
M6<\/td>0.80<\/td>4.25<\/td>5.00<\/td>4.00<\/td>1.50<\/td>12.00 Co<\/td><\/tr>
M8<\/td>0.80<\/td>5.00<\/td>5.00<\/td>4.00<\/td>1.50<\/td>1.25 Nb<\/td><\/tr>
M15<\/td>1.50<\/td>6.50<\/td>3.50<\/td>4.00<\/td>5.00<\/td>5.00 Co<\/td><\/tr>
M45<\/td>1.25<\/td>8.00<\/td>5.00<\/td>4.25<\/td>1.60<\/td>5.50 Co<\/td><\/tr>
T3<\/td>1.05<\/td>18.00<\/td>—<\/td>4.00<\/td>3.00<\/td>—<\/td><\/tr>
T7<\/td>0.75<\/td>14.00<\/td>—<\/td>4.00<\/td>2.00<\/td>—<\/td><\/tr>
T9<\/td>1.20<\/td>18.00<\/td>—<\/td>4.00<\/td>4.00<\/td>—<\/td><\/tr>
\uc5f4\uac04 \uacf5\uad6c\uac15<\/td><\/tr>
H15<\/td>0.40<\/td>—<\/td>5.00<\/td>5.00<\/td>—<\/td>—<\/td><\/tr>
H16<\/td>0.55<\/td>7.00<\/td>—<\/td>7.00<\/td>—<\/td>—<\/td><\/tr>
H20<\/td>0.35<\/td>9.00<\/td>—<\/td>2.00<\/td>—<\/td>—<\/td><\/tr>
H41<\/td>0.65<\/td>1.50<\/td>8.00<\/td>4.00<\/td>1.00<\/td>—<\/td><\/tr>
H43<\/td>0.55<\/td>—<\/td>8.00<\/td>4.00<\/td>2.00<\/td>—<\/td><\/tr>
\ub0c9\uac04\uacf5\uad6c\uac15<\/td><\/tr>
D1<\/td>1.00<\/td>—<\/td>1.00<\/td>12.00<\/td>—<\/td>—<\/td><\/tr>
D6 (a)<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
A5<\/td>1.00<\/td>—<\/td>1.00<\/td>1.00<\/td>—<\/td>3.00 Mn<\/td><\/tr>
\ub0b4\ucda9\uaca9\uac15<\/td><\/tr>
S3<\/td>0.50<\/td>1.00<\/td>—<\/td>0.74<\/td>—<\/td>—<\/td><\/tr>
S4<\/td>0.55<\/td>—<\/td>—<\/td>—<\/td>—<\/td>2.00 Si, 0.80 Mn<\/td><\/tr>
\uae08\ud615\uac15<\/td><\/tr>
P1<\/td>0.10<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
\ud2b9\uc218\ubaa9\uc801\uac15<\/td><\/tr>
L1<\/td>1.00<\/td>—<\/td>—<\/td>1.25<\/td>—<\/td>—<\/td><\/tr>
L3<\/td>1.00<\/td>—<\/td>—<\/td>1.50<\/td>0.20<\/td>—<\/td><\/tr>
L4<\/td>1.00<\/td>—<\/td>—<\/td>1.50<\/td>0.25<\/td>0.60 Mn<\/td><\/tr>
L5<\/td>1.00<\/td>—<\/td>0.25<\/td>1.00<\/td>—<\/td>1.00 Mn<\/td><\/tr>
L7<\/td>1.00<\/td>—<\/td>0.40<\/td>1.40<\/td>—<\/td>0.35 Mn<\/td><\/tr>
F1<\/td>1.00<\/td>1.25<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
F2<\/td>1.25<\/td>3.50<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
F3<\/td>1.25<\/td>3.50<\/td>—<\/td>0.75<\/td>—<\/td>—<\/td><\/tr>
\uc218\uacbd\ud654 \uacf5\uad6c\uac15<\/td><\/tr>
W3<\/td>1.00<\/td>—<\/td>—<\/td>—<\/td>0.50<\/td>—<\/td><\/tr>
W4<\/td>0.60\/1.40 (b)<\/td>—<\/td>—<\/td>0.25<\/td>—<\/td>—<\/td><\/tr>
W6<\/td>1.00<\/td>—<\/td>—<\/td>0.25<\/td>0.25<\/td>—<\/td><\/tr>
W7<\/td>1.00<\/td>—<\/td>—<\/td>0.50<\/td>0.20<\/td>—<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\ucd9c\ucc98: ASM Handbook Vol.1, Wrought Tool Steels \ud56d\ubaa9, Table 3. \ucd9c\ucc98 \uac01\uc8fc: (a) D6\ub294 \ud604\uc7ac Table 1\uc5d0\uc11c D3\uc5d0 \ud3ec\ud568\ub418\uc5b4 \uc788\uc73c\ubbc0\ub85c, \ucd9c\ucc98\uc5d0\ub294 \ud574\ub2f9 \uac15\uc885\uc5d0 \ub300\ud55c \ubcc4\ub3c4\uc758 \uc870\uc131\uc774 \uae30\uc7ac\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc74c, (b) W4\uc5d0\ub294 \ub2e4\uc591\ud55c \ud0c4\uc18c \ud568\ub7c9\uc774 \uc0ac\uc6a9 \uac00\ub2a5\ud558\uc600\uc74c. \ub300\uc2dc(\u2014)\ub294 \ucd9c\ucc98\uc5d0 \uac12\uc774 \uae30\uc7ac\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc74c\uc744 \uc758\ubbf8\ud568.<\/em><\/p>\n\n\n\n

\uc624\ub798\ub41c \ub3c4\uba74\uc5d0\uc11c \uac00\uc7a5 \ud754\ud788 \ubc1c\uacac\ub418\ub294 \uac15\uc885<\/h2>\n\n\n\n

\uc774 \uc911 \ub124 \uac00\uc9c0\ub294 \uc774\ub984\uc744 \ubd99\uc77c \uac00\uce58\uac00 \uc788\uc744 \ub9cc\ud07c \uc790\uc8fc \ub4f1\uc7a5\ud569\ub2c8\ub2e4. T3, T7, T9\ub294 T1\uacfc T15 \uc0ac\uc774\uc758 \ud145\uc2a4\ud150 \uace0\uc18d\ub3c4\uac15\uc73c\ub85c, \ud604\uc7ac\ub3c4 \ud310\ub9e4\ub418\ub294 T1, T15\uc640 \uac19\uc740 \uacc4\uc5f4\uc5d0 \uc18d\ud558\ubbc0\ub85c T3\ub97c \uc694\uad6c\ud558\ub294 \ub3c4\uba74\uc740 \uc6a9\ub3c4\uc5d0 \ub530\ub77c \ud604\uc7ac\uc758 \ud145\uc2a4\ud150 \uac15\uc885\uc774\ub098 \ubab0\ub9ac\ube0c\ub374 \ub4f1\uac00 \uac15\uc885\uc73c\ub85c \ub300\uccb4\ub418\ub294 \uac83\uc774 \uc77c\ubc18\uc801\uc785\ub2c8\ub2e4. H20\uacfc H15\ub294 \ud06c\ub86c \uc5f4\uac04 \uac00\uacf5\uac15 \uacc4\uc5f4\uc774 H11, H12, H13\uc73c\ub85c \uc815\ucc29\ub418\uae30 \uc774\uc804\uc758 \uc5f4\uac04 \uac00\uacf5 \uac15\uc885\uc774\uba70, \ub458 \ub2e4 \uc624\ub298\ub0a0 \uc0dd\uc0b0\ub418\ub294 \uc5b4\ub5a4 \uac15\uc885\ubcf4\ub2e4 \ud145\uc2a4\ud150 \ud568\ub7c9\uc774 \ub192\uc2b5\ub2c8\ub2e4. D1\uc740 D2\uc640 D3\uac00 \ub300\ubd80\ubd84 \ub300\uccb4\ud55c 12% \ud06c\ub86c \ub0c9\uac04 \uac00\uacf5 \uac15\uc885\uc774\uba70, D6\ub294 D3\uc5d0 \uc644\uc804\ud788 \ud1b5\ud569\ub418\uc5c8\uc2b5\ub2c8\ub2e4. F1, F2, F3\ub294 \ud0c4\uc18c-\ud145\uc2a4\ud150 \ud2b9\uc218 \ubaa9\uc801 \uac15\uc885\uc73c\ub85c, \ud604\uc7ac \uac00\uc7a5 \uac00\uae4c\uc6b4 \ub4f1\uac00 \uac15\uc885\uc740 \ud569\uae08\ub7c9\uc774 \ub354 \ub9ce\uc740 \uc218\uacbd\ud654 \uac15\uc885\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub354 \uc774\uc0c1 \uc0dd\uc0b0\ub418\uc9c0 \uc54a\ub294 \uac15\uc885\uc758 \ub300\uccb4<\/h2>\n\n\n\n

\ub2e8\uc0b0\ub41c \uac15\uc885\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud654\ud559\uc801 \uc77c\uce58\ub85c \ub300\uccb4\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc77c\uce58\ud558\ub294 \uac15\uc885\uc774 \uc5c6\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc720\uc6a9\ud55c \uc811\uadfc\ubc95\uc740 \ub3c4\uba74\uc774 \uc694\uad6c\ud558\ub294 \ud2b9\uc131\uc73c\ub85c \ub418\ub3cc\uc544\uac04 \ud6c4, \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uac15\uc885 \uc911\uc5d0\uc11c \uc120\ud0dd\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \ud145\uc2a4\ud150 \uace0\uc18d\ub3c4\uac15 \uacc4\uc5f4\uc5d0\uc11c\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uace0\uc628 \uacbd\ub3c4 \uae30\uc900\uc73c\ub85c \ub300\uccb4\ud558\uba70, \ud604\uc7ac\uc758 \ud145\uc2a4\ud150 \uac15\uc885\uc774\ub098 \ucf54\ubc1c\ud2b8-\ubab0\ub9ac\ube0c\ub374 \uac15\uc885\uc774 \ub3d9\uc77c\ud55c \ubc94\uc704\ub97c \ucda9\uc871\ud569\ub2c8\ub2e4. \uc5f4\uac04 \uac00\uacf5\uc5d0\uc11c\ub294 \uc0ac\uc6a9 \uacbd\ub3c4\uc640 \ub0b4\uc5f4\ud53c\ub85c\uc131 \uae30\uc900\uc73c\ub85c \ub300\uccb4\ud569\ub2c8\ub2e4. \ub0c9\uac04 \uac00\uacf5\uc5d0\uc11c\ub294 \uc8fc\uc5b4\uc9c4 \uacbd\ub3c4\uc5d0\uc11c\uc758 \ub0b4\ub9c8\ubaa8\uc131 \uae30\uc900\uc73c\ub85c \ub300\uccb4\ud558\uba70, \uc5ec\uae30\uc5d0 \ud604\uc7ac\uc758 D \uacc4\uc5f4\uacfc P\/M \ub0c9\uac04 \uac00\uacf5 \uac15\uc885\uc774 \ud574\ub2f9\ud569\ub2c8\ub2e4. \ubaa8\ub4e0 \uacbd\uc6b0\uc5d0 \ub450 \uac00\uc9c0\ub294 \ubcc0\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub3c4\uba74\uc5d0 \uae30\uc7ac\ub41c \uacbd\ub3c4\ub294 \uacf5\uad6c\uac00 \uc124\uacc4\ub41c \uacbd\ub3c4\uc774\ubbc0\ub85c \ucd08\uacfc\ud558\uc9c0 \ub9d0\uace0 \uc77c\uce58\uc2dc\ucf1c\uc57c \ud558\uba70, \uc5f4\ucc98\ub9ac \uc0ac\uc774\ud074\uc740 \uc624\ub798\ub41c \ub3c4\uba74\uc774 \uc544\ub2c8\ub77c \uc2e4\uc81c \uacf5\uae09\ub41c \uac15\uc885\uc5d0\uc11c \uac00\uc838\uc640\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc131\ubd84 \ub370\uc774\ud130\ub294 \uc77c\ubc18\uc801\uc778 \ucc38\uace0\uc6a9\uc73c\ub85c\ub9cc \uc81c\uacf5\ub429\ub2c8\ub2e4. \uc2e4\uc81c \uac12\uc740 \ud45c\uc900, \uc81c\ucca0\uc18c \ubc0f \uc0dd\uc0b0 \ubc88\ud638\uc5d0 \ub530\ub77c \ub2e4\ub97c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc815\ud655\ud55c \uac12\uc740 \uc7ac\ub8cc \uc2dc\ud5d8 \uc131\uc801\uc11c(MTC)\ub97c \ud655\uc778\ud558\uac70\ub098 Aobo Steel\uc5d0 \ubb38\uc758\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n

\ub2e4\uc74c\uc73c\ub85c \ubcfc \uacf3<\/h2>\n\n\n\n

\ud604\uc7ac\ub3c4 \uc0dd\uc0b0\ub418\ub294 \uac15\uc885\uc758 \uc870\uc131\uc740 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: \uacf5\uad6c\uac15 \uc870\uc131 \ucc28\ud2b8<\/a>, \uadf8\ub9ac\uace0 \uc774 \ubaa9\ub85d\uc5d0\uc11c \uac15\uc885\uc774 \uc81c\uc678\ub41c L\uad70\uacfc S\uad70\uc758 \ud2b9\uc131\uc740 \ub2e4\uc74c\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: L \uacc4\uc5f4 \ubc0f S \uacc4\uc5f4 \ud2b9\uc131<\/a> \ud398\uc774\uc9c0. \ub300\uccb4\ub97c \uacb0\uc815\ud558\ub294 \ud2b9\uc131\uc740 \ub2e4\uc74c\uc5d0 \uc815\ub9ac\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4: \uacf5\uad6c\uac15 \ud2b9\uc131 \ucc28\ud2b8<\/a>. Aobo Steel\uc740 \ub2e8\uc0b0\ub41c \uac15\uc885\uc744 \uba85\uc2dc\ud55c \ub3c4\uba74\uc5d0 \ub300\ud574 \ud604\uc7ac\uc758 \ub4f1\uac00 \uac15\uc885\uc744 \uacac\uc801\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\ucd9c\ucc98: ASM Handbook, Vol 1, Properties and Selection: Irons, Steels and High-Performance Alloys.<\/p>","protected":false},"excerpt":{"rendered":"

Tool Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may […]<\/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":"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":"","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":"default","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-20830","page","type-page","status-publish","hentry"],"yoast_head":"\nObsolete Tool Steel Grades and Their Compositions<\/title>\n<meta name=\"description\" content=\"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/ko\/obsolete-tool-steel-grades\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tool Steel Grades No Longer in Common Use, Compositions\" \/>\n<meta property=\"og:description\" content=\"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/ko\/obsolete-tool-steel-grades\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-16T08:08:32+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data1\" content=\"4\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"Tool Steel Grades No Longer in Common Use, Compositions\",\"datePublished\":\"2026-10-03T08:48:52+00:00\",\"dateModified\":\"2026-10-16T08:08:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/\"},\"wordCount\":776,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"inLanguage\":\"ko-KR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/\",\"name\":\"Obsolete Tool Steel Grades and Their Compositions\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"datePublished\":\"2026-10-03T08:48:52+00:00\",\"dateModified\":\"2026-10-16T08:08:32+00:00\",\"description\":\"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/#breadcrumb\"},\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/obsolete-tool-steel-grades\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Tool Steel Grades No Longer in Common Use, Compositions\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"name\":\"AoboSteel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aobosteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"width\":1052,\"height\":592,\"caption\":\"AoboSteel\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\",\"name\":\"Evan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"caption\":\"Evan\"},\"sameAs\":[\"http:\\\/\\\/www.aobosteel.com\",\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.instagram.com\\\/aobosteel\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\",\"https:\\\/\\\/x.com\\\/AobosteelEvan\",\"https:\\\/\\\/www.youtube.com\\\/@aobosteel\"],\"url\":\"https:\\\/\\\/aobosteel.com\\\/ko\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\ud3d0\uc9c0\ub41c \uacf5\uad6c\uac15 \ub4f1\uae09 \ubc0f \uadf8 \uc870\uc131","description":"\ub354 \uc774\uc0c1 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 M6~W7 \uacf5\uad6c\uac15 \ub4f1\uae09\uc758 \uc870\uc131\uc744 \uacc4\uc5f4\ubcc4\ub85c \ubd84\ub958\ud558\uc5ec, \uc624\ub798\ub41c \ub3c4\uba74\uc774\ub098 \uacf5\uad6c\uc5d0 \uae30\uc7ac\ub41c \ub4f1\uae09\uc744 \ud655\uc778\ud558\ub294 \ub370 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aobosteel.com\/ko\/obsolete-tool-steel-grades\/","og_locale":"ko_KR","og_type":"article","og_title":"Tool Steel Grades No Longer in Common Use, Compositions","og_description":"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.","og_url":"https:\/\/aobosteel.com\/ko\/obsolete-tool-steel-grades\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","article_modified_time":"2026-10-16T08:08:32+00:00","twitter_card":"summary_large_image","twitter_misc":{"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04":"4\ubd84"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"Tool Steel Grades No Longer in Common Use, Compositions","datePublished":"2026-10-03T08:48:52+00:00","dateModified":"2026-10-16T08:08:32+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/"},"wordCount":776,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"inLanguage":"ko-KR"},{"@type":"WebPage","@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/","url":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/","name":"\ud3d0\uc9c0\ub41c \uacf5\uad6c\uac15 \ub4f1\uae09 \ubc0f \uadf8 \uc870\uc131","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"datePublished":"2026-10-03T08:48:52+00:00","dateModified":"2026-10-16T08:08:32+00:00","description":"\ub354 \uc774\uc0c1 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 M6~W7 \uacf5\uad6c\uac15 \ub4f1\uae09\uc758 \uc870\uc131\uc744 \uacc4\uc5f4\ubcc4\ub85c \ubd84\ub958\ud558\uc5ec, \uc624\ub798\ub41c \ub3c4\uba74\uc774\ub098 \uacf5\uad6c\uc5d0 \uae30\uc7ac\ub41c \ub4f1\uae09\uc744 \ud655\uc778\ud558\ub294 \ub370 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/#breadcrumb"},"inLanguage":"ko-KR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/obsolete-tool-steel-grades\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"Tool Steel Grades No Longer in Common Use, Compositions"}]},{"@type":"WebSite","@id":"https:\/\/aobosteel.com\/#website","url":"https:\/\/aobosteel.com\/","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","description":"","publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aobosteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ko-KR"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","width":1052,"height":592,"caption":"AoboSteel"},"image":{"@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/"]},{"@type":"Person","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7","name":"\uc5d0\ubc18","image":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","caption":"Evan"},"sameAs":["http:\/\/www.aobosteel.com","https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.instagram.com\/aobosteel\/","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/","https:\/\/x.com\/AobosteelEvan","https:\/\/www.youtube.com\/@aobosteel"],"url":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Tool Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may…","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Tool Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/20830","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=20830"}],"version-history":[{"count":4,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/20830\/revisions"}],"predecessor-version":[{"id":23184,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/20830\/revisions\/23184"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media?parent=20830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}