Executive Standard: JIS G4053-2003
● Chemical Composition:
Carbon C: 0.32 ~ 0.40
Si Si: 0.15 ~ 0.35
Manganese Mn: 0.35 ~ 0.65
Sulfur S: to allow the residual content ≤ 0.030
Phosphorus P: to allow the residual content ≤ 0.030
Chromium Cr: 0.60 ~ 1.00
Ni-Ni: 3.00 ~ 3.50
Copper Cu: to allow the residual content ≤ 0.030
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 1130 (115)
Yield strength σs (MPa): ≥ 980 (100)
Elongation δ5 (%): ≥ 10
Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 47
Impact toughness αkv (J/cm2): ≥ 59 (6)
Hardness: ≤ 269HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Standard heat treatment: quenching 820 ℃, oil cooling; tempering 500 ℃, water-cooled, oil-cooling.
● Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.
