硬度对照表序号1234567891011121314151617181920212223242526272829303132333435363738394041424344454647抗拉强度 Rm N/mm2770785800820835850865880900915930950965995103010601095112511151190122012551290132013501385142014551485152015551595163016651700174017751810184518801920195519952030207021052145维氏硬度HV240245250255260265270275280285290295300310320330340350360370380390400410420430440450460470480490500510520530540550560570580590600610620630640布氏硬度HB228233238242247252257261266271276280285295304314323333342352361371380390399409418428437447(456)(466)(475)(485)(494)(504)(513)(523)(532)(542)(551)(561)(570)(580)(589)(599)(608)洛氏硬度HRC20.321.322.223.12424.825.626.427.127.828.529.229.83132.233.334.435.536.637.738.839.840.841.842.743.644.545.346.146.947.748.449.149.850.551.151.752.35353.654.154.755.255.756.356.857.3