25-3030-3535-4040-45 45-50 50-5555-60＞60130350300200＜160235（甲）520460420350290＜170340（甲）540490430370310＜200445（甲）550520450380320300180550（甲）560530460390330310180660580540460400360310250180730Mn490400350300200840Mn540200950Mn5604704103402702101601030Mn2*450400350300＜2001140Mn2*5404203703202702401250Mn2*6004804003001335SiMn*5605204604003502001442Mn2V6005204704303502001530Cr5002001640Cr580510470420340200＜1601745Cr620530480420340200＜1801850Cr650570480400280230＜1801940CrSi*6305505204504003302202030CrMn2*6005004503802802002140CrMn*5805102302002230CrMnSi*6205305004303401802335CrMnSiA*6205305004303602002440CrV6405605004503202002545CrV6405605004503202002650CrV6505605004503802801802730CrMo5604404002002835CrMo6005504804003002002942CrMo6205805004003001803040CrMnMo5505004504002503140CrNi*5805104604203402003237CrNi3A*5705004203003003340CrNiMoA6205805404804203203435CrNiMoA6105705304404003203535CrNi3MoA6305805404804203203630Cr2MoV6305404503735CrMoV640590500360300＜2003838CrSi*6305505204504003303940Cr2MoV6404038CrMoAlA6806305304303202004140B5504504245B6606005004350B4204003602804440MnB*550出炉水冷4504540MnVB6004604640CrB6205304704304740CrMnMoVBA6205004504845CrNi*570500430360280230＜1604950CrNi*580520450350270230200回火后硬度与回火温度的关系编号钢号5065620550500450380300230＜2005170620550500450380310230＜2005285620550500450380330250＜2005360Mn5505004504005465Mn660600520440380300230＜1705555SiMn5504905660Si2MnA6206005505204704203801805750CrMn5805004504003305850CrMnVA5605204304005960Si2CrV4604206055Si2B5004404003603006165Si2WA4206230W4Cr2VA63GCr6550500460400300250＜20064GCr9550500460410350270＜18065GCr15680580530480420380270＜18066GCr9SiMn420350280＜20067GCr15SiMn480420350280＜18068CrMnSi60056052046040069Cr8WV700650600540450250＜18070T7(A)580530470420370320250＜16071T8(A)580530470420370332250＜16072T10(A)580540490430380340250＜20073T12(A)580540490430380340250＜200749Mn2400340280＜200759Mn2V500400320250＜18076SiMn500430370330＜20077Cr2530600530480420320230＜180789...
