... Cutting Steel Representative steel grades are 48MnV, 30MnVS, 38MnVS, 38MnSiVS5,YF40MnV, 12Mn2VB, SAE1141, SAE1117, Y15, etc.Main application: This kind of steel ... is one new-style environmental protecting micro-alloy steel which has been developing quickly ... toughness. The free-machining & non-hardened and tempered steel supplied by us have been used widely in crankshaft ...