40CrNiMo Alloy Structural Steel

40CrNiMo has high strength, toughness, good hardenability and resistance to overheating, and it is mainly used in high strength parts such as aero engine shafts, shafts, gears, tight firmware, etc.

40CrNiMo Chemical Composition

C 0.37~0.44
Si 0.17~0.37
Mn0.50~0.80
S Allowable residual content≤0.025
P Allowable residual content≤0.025
Cr 0.60~0.90
Ni 1.25~1.65
Cu Allowable residual content≤0.25
Mo0.15~0.25

Mechanical Property of 40CrNiMo

Tensile strength σb (MPa): ≥ 980 (100)
Yield strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥12
Area shrinkage ψ (%): ≥ 55
Impact work Aku (J): ≥78
Impact toughness value αkv (J/cm²): ≥98(10)
Sample size: sample blank size is 25mm
Heat treatment: (quenching 850 degrees; coolant: oil; tempering temperature 600 degrees; coolant: water, oil);
Steel annealing or high temperature tempering supply state Brinell hardness GBW ≤ 269;

40CrNiMo Scope of application

Generally, 40CrNiMo steel is mainly used in produce important parts with high strength and good plasticity, and important parts with special performance requirements such as shafts, gears and fasteners.

40CrNiMo Structural Steel Specification

Round rolled：Φ10~320
Flat-rolled products：Φ5~50×44~150
Square rolled：□80~280
Round Forging: Φ100~950
Fang Forging：□120~740