Implementation of standards GB/T3077-1999
40CrNiMo mechanical properties:
Tensile strength σb (MPa) ≥ 980 (100), elongation δ5 (%) ≥ 12, Reduction of ψ (%) ≥ 55, the impact of power Akv (J) ≥ 78, the impact toughness values αkv (J/cm2 ) ≥ 98 (10)
40CrNiMo heat treatment specifications:
Quenching 850 ℃, oil cooling; tempering 600 ℃, water-cooled, oil-cooling.
40CrNiMo Delivery status:
Heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.
40CrNiMo components:
40CrNiMo Mn Mn 0.50 ~ 0.80, S, allows the residual sulfur content ≤ 0.025, P to allow the residual phosphorus content ≤ 0.025, Cr-Cr 0.60 ~ 0.90, Ni-Ni 1.25 ~ 1.65, to allow the residual content of copper Cu ≤ 0.025, Mo-Mo 0.15 ~ 0.25.
40CrNiMo theoretical weight
◆ round steel: weight per meter (kg) = 0.00617 × diameter × diameter (Note: rebar and round the same)
◆ flat steel: weight per meter (kg) = 0.00785 × thickness × side width
◆ Tube: Weight per meter (kg) = 0.02466 × thickness × (OD - Wall Thickness)
◆ plate: Weight per meter (kg) = 0.785 × thickness
