40CrNiMo alloy structural steel, 40CrNiMoA is a kind of composite steel, also called alloy steel, which is made of high-quality carbon structural steel and one or more alloying elements (the total content is less than 5%).
Implement the standard GB/T 3077-20 15.
Chemical composition:
C: 0.37-0.44
Silicon: 0. 17-0.37
Manganese Mn:0.50-0.80
Mo:0. 15~0.25
Chromium Cr:0.60-0.90
Nickel Ni: 1.25- 1.65
Sulfur content: ≤0.025
Phosphorus P :≤0.025
Copper Cu:≤0.25
Mechanical properties:
Tensile strength σb (MPa):≥980( 100)
Yield strength σs (MPa):≥835(85)
Elongation δ5 (%):≥ 12
Area shrinkage ψ (%):≥55
Impact work Akv (J):≥78
Impact toughness value αkv (J/cm? ):≥98( 10)
Use:
Used as transmission eccentric shaft of horizontal forging press, crankshaft of forging press and so on. After tempering, it is used to manufacture important parts with good plasticity, high strength and large size. Such as high-load shafts in heavy machinery, steam turbine shafts with a diameter greater than 250mm, blades, high-load transmission parts, fasteners, crankshafts, gears, etc. In addition, it can also be used to manufacture important parts with special performance requirements after nitriding.
Delivery status:
Heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment delivery.