SK5 高碳素工具钢
化学成分(%):
C:0.80~0.90
Si:≤0.35
Mn:≤0.50
S:≤0.030
P:≤0.030
Cr:≤0.20
Ni:≤0.25
Cu:≤0.25
碳素工具钢; SK140 SK120 SK105 SK95 SK90 SK85 SK80 SK75 SK70 SK65 SK60 旧钢号: SK1 SK2 TC120 SK3 TC105 SK4 TC90 SK5 TC80 SK6 TC70 SK7