34Cr4 steel quenched after the load for the manufacture of medium and medium speed to withstand the mechanical parts work.
34Cr4 chemical composition:
Carbon C: 0.30 ~ 0.37
Si Si: ≤ 0.40
Manganese Mn: 0.60 ~ 0.90
Sulfur S: to allow the residual content of ≤ 0.035
Phosphorus P: allow the residual content ≤ 0.035
Chromium Cr: 0.90 ~ 1.20
Ni: to allow the residual content of ≤ 0.25 Copper Cu: to allow the residual content ≤ 0.030
34Cr4 mechanical properties:
Tensile strength σb (MPa): ≥ 930 (95)
Yield strength σs (MPa): ≥ 735 (75)
Elongation δ5 (%): ≥ 11
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 47
Impact toughness αkv (J/cm2): ≥ 59 (6)
Hardness: ≤ 207HB
Sample size: Sample size is 25mm rough
