20CrNiMo 35CrMo 42CrMo
30Cr2Ni4MoV
42CrMo 5CrNiMo..
20CrNiMo 35CrM..
38CrMoAL 40CrN..
42CrNiMo 35CrN..
22SiMn2TiB防弹钢