ーSAE J417(1983改訂)JISハンドブックより抜粋ー(500)(487)(475)(464)(18)(16)(14)(12)(10)( 8)( 6)( 4)( 2)( 0)−−−−−−−−−−−−−207520151950188018201760169516351580153014801435138513401295125012151180116011151080105510251000980950930910880860840825805785770760730705675650620600580550530515−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−(HS)ショア硬さ(HRD)Dスケール荷重100kgfダイヤモンド円錐圧子(HRB)Bスケール荷重100kgf径1.6mm(1/16in)球(HRA)Aスケール荷重60kgfダイヤモンド円錐圧子(HB)ブリネル硬さ(HV)ビッカース硬さ(HRC)ロックウェルCスケール荷重150kgfダイヤモンド円 錐 圧 子備考1:青字の数字は、ASTM E 140 表1 による。(SAE−ASM−ASTMが合同で調整したものである) SAE :アメリカ自動車技術者協会 ASM :アメリカ金属協会 ASTM:アメリカ材料試験協会備考2:表中括弧( )内の数値は、あまり用いられない範囲のものであり参考として示したものである。 (1)1MPa=1N/mm293.292.992.592.291.891.491.190.790.289.889.388.988.387.987.486.986.485.985.585.084.583.983.583.082.582.081.580.980.479.979.478.878.377.777.276.676.175.675.074.573.973.372.872.271.671.070.569.969.4−−−−−−−−−−76.985.676.185.075.484.574.5(739)83.973.8(722)83.473.0(705)82.872.2(688)82.371.5(670)81.870.7(654)81.269.9(634)80.769.280.168.579.667.779.066.978.566.178.065.477.464.676.863.876.363.175.962.175.261.474.760.874.160.073.659.273.158.572.557.772.056.971.556.270.955.470.454.669.969.453.868.953.168.4(109.0)52.367.9(108.5)51.567.4(108.0)50.866.8(107.5)50.066.3(107.0)49.265.8(106.0)48.465.3(105.5)47.764.7(104.5)47.064.3(104.0)46.163.8(103.0)45.263.3(102.5)44.662.8(101.5)43.862.4(101.0)43.142.162.061.541.661.040.940.160.5−−−−−−−−−−−−−−−−−−−−84.483.682.881.981.180.179.378.477.576.675.774.873.973.072.071.270.269.468.567.666.765.864.864.063.162.261.360.459.558.657.756.855.955.054.253.352.151.350.449.548.647.746.845.945.044.043.242.341.5−−−−−−−−−−75.474.273.372.071.069.968.867.766.665.564.363.262.060.959.858.657.456.155.053.852.551.450.349.047.846.745.544.343.141.940.839.638.437.236.134.933.732.531.330.128.927.826.725.524.323.122.020.719.6−−−−−−−−−−979592918887858381807876757472716968676664636260585756555452515049484746444342414140383837363535343332312928272625242468676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120940900865832800772746720697674653633613595577560544528513498484471458446434423412402392382372363354345336327318310302294286279272266260254248243238230222213204196188180173166160451442432421409400390381371362353344336327319311301294286279271264258253247243237231226219212203194187179171165158152615595577560543525512496481469455443432421409400390381371362353344336327319311301294286279271264258253247243237231226219212203194187179171165158152 100.0 99.0 98.5 97.8 96.7 95.5 93.9 92.3 90.7 89.5 87.1 85.5 83.5 81.715−Nスケール荷重15kgf30−Nスケール荷重30kgf45−Nスケール荷重45kgf1161鋼のロックウェル Cスケール硬さに対する近似的換算値硬さ標準球タングステンカーバイド球10mm球ロックウェル硬さ荷重3000kgfロックウェルスーパーフィシャル硬さダイヤモンド円錐圧子引張強さ(近似値)MPa(1)硬さ換算法
元のページ ../index.html#1163