谁知道圆钢材质
圆钢材质： 20Mn2 30Mn2 35Mn2 40Mn2 45Mn2 50Mn2 37SiMn 20MnMo 20Cr 40Cr 50Cr 38CrSi 15CrMo 20CrMo 30CrMo 35CrMo 42CrMo 35CrMoV 60CrMoV 38CrMoAl 40CrV 25CrMnSi 30CrMnSi 35CrMnSiA 20CrMnMo 40CrMnMo 60CrMnMo 20CrMnTi 30CrMnTi 40CrNi 45CrNi 12CrNi2 12CrNi3 20CrNi3 37CrNi3 12Cr2Ni4 20Cr2Ni4 20CrNiMo 40CrNiMoA 20CrNi2MoA 40CrNi2MoA 20Ni4MoA 45CrNiMoVA 18Cr2Ni4WA 25Cr2Ni4WA 15Cr2Mo1 12Cr1MoV 25Cr2MoVA 25Cr2Mo1VA 27CrMoTi 23CrNi3MoA 15CrMn 20CrMn 40CrMn 25SiMn2Mov 37SiMn2Mov 20MnV 20CrMn2Mov GCr15 Gcr15SiMn G20CrNiMo G20CrNi2Mo G20Cr2Ni4 9CRSi 9Cr2 4CrW2Si 5CrW2Si 6CrW2Si 9Mn2V CrWMn 9CrWmn 7CrSiMnMov 5CrMnMo 5CrNiMo 8Cr3 718 P20 4Cr5W2VSi