Special supply 40Cr steel pipe chemical composition and mechanical properties according to the standard GB/T 3077-2008
40Cr steel pipe chemical composition (mass fraction,%) C 0.37~0.44, Si 0.17~0.37, Mn 0.50~0.80, Cr0.80~1.10, Ni≤0.30.
[40Cr steel pipe mechanical properties] blank size (mm): 25
Heat treatment: the first quenching heating temperature (°C): 850; coolant: second quenching oil heating temperature (°C): - tempering heating temperature (°C): 520; coolant: water, oil tensile strength (σb /MPa): 980 Yield point (σs/MPa): ?785 Elongation after fracture (δ5/%): ?9 Area shrinkage (ψ/%): ?45 Impact absorption work (Aku2/J): ?47 Brinell Hardness (HBS100/3000) (annealed or high temperature tempered): 207
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