55NiCrMoV7 is belongs to Alloy tool steel under the Chinese standard of GB/T 1299-2000 , it mainly add the chromium, molybdenum, tungsten, vanadium and other alloying elements to improve the harden ability and toughness in carbon tool steel .
Chemical content of JIS SM400A round bar and technique of JIS SM400A cold drawn round bar
Chemical Composition
The material 65Mn is a kind of spring steel under the standard GB/T 1222-2007. 65Mn Chemical composition %: Grade Chemical composition %: C Si Mn S P
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