... of the alloy steel, heat treatment hardness 60 HRC (rockwell hardness) above, hardness in brinell 5.0 6.5, ... for nickel and iron, and at the same time, also contain Cr, Si, S, P, ... 8% and 10-15%, at the same time also have small manufacturer can produce nickel amount ... content in the steel determines the heat treatment of hardness, especially contain chromium, manganese, vanadium, molybdenum, ...
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