material from baosteel have first class machine matual production skills high ... steel wire heats stably, it is to ensure consistency of material properties.3. As it has very mature and stable application of ... grade:Sae9254,Sup12v,55cr3,52100,sup7,38crmoal,sup6, 60si2mna,65mn,scm415-scm440,swrch6a-Swrch22a,Swrch35k-Swrch45k, Swrch72b-Swrch82b and etc.6 ...