CNC Machining 40CrNiMoA Steel Parts
40CrNiMoA Round Steel, 40CrNiMoA Combined Steel, 40CrNiMoA Steel, Alloy Structural Steel Referred To As Consolidated Steel, 40CrNiMoA Is One Of The Combined Steel, Also Called Alloy Steel, Which Is Based On High-Quality Carbon Structural Steel, Properly Added A Steel Grade Made Of One Or Several Alloying Elements (Total Content Not Exceeding 5%).Common Quality Defects Of Bearing Parts After Heat Treatment Include: Quenching Microstructure Overheating, Underheating, Quenching Cracks, Insufficient Hardness, Heat Treatment Deformation, Surface Decarburization, Soft Spots, Etc.
Common Quality Defects Of Bearing Parts After Heat Treatment Include: Quenching Microstructure Overheating, Underheating, Quenching Cracks, Insufficient Hardness, Heat Treatment Deformation, Surface Decarburization, Soft Spots, Etc.
Implementation Of The Standard GB/T 3077-1999.
Uniform Digital Code A50403;
Grade 40CrNiMoA;
Mechanical Properties
Density ρ (kg / m3): about 7830
Modulus Of Elasticity (GPa): 209
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/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 HBW ≤ 269;
Chemical Composition
C ：0.37～0.44
Si：0.17～0.37
Mn：0.50～0.80
s : Allow 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
Mo：0.15～0.25