Iron alloy,base,Fe 74-80,Co 7.5-8.5,Mo 5.5-6.1,Cr 3.6-4.2,V 1.8-2.4,W 1-2,C 1,Mn 0-0.5,Ni 0-0.5,Si 0-0.5 (R2F2K8M6)
CAS No. 39476-95-4
Ultracarb U 5 106750-27-0