Standard: GB / T 1220-1992
Features and Scope:
Corrosion resistance of stainless steel, eliminating the heat treatment, the heat treatment does not cause deformation, super mirror processing performance, good mechanical processability in the annealed condition. Corrosive gases used fluorinated plastics or add flame retardants corrosive plastic mold.
Chemical composition:
C 0.26-0.40 Mn≤1.00 Si≤1.00, P≤0.040 S≤0.030 Cr 12.00-14.00 Ni≤0.60 [1]
Performance:
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[2] Yield strength (N / mm2) ≥540, tensile strength (N / mm2) ≥740, the elongation EL (%) ≥12, hardness ≥HBW217
Section shrinkage /% ≥40 Charpy impact value / (J / cm2) ≥29 [3]
Heat / ℃
Quenching temperature 1000 ~ 1050 ℃, tempering temperature of 200 ~ 500 ℃, hardness 50 ~ 55HRC. Standard: GB / T 1220-1992