... :8 Fe:5Hardness modest, applicable to the axis, the punch, valve, gear surface and so on repairHRC 50-55 C:0 ... .5 Si:3 Cr:12 Fe 5 Used in general valve, seal face, oil plunger, axial and repairHRC 60 C:0 ... , innovation and enterprise"for the purpose, follow the "customer first, continuous improvement, innovation and development and achieve win-win situation, " the ...