Products

40CrNiMoA – 42CrMo4 High-quality Alloy Structural Steel Plate/Coil for Industry

Material 40CrNiMoA
Standard AiSi, ASTM, BS, DIN, GB, JIS
Technique Hot Rolled/Cold Rolled
Width 1.5-2.5m
Length 12m or As Requirement
Surface Treatment As Requirement
Packages sea-worth Package

40CrNiMoA round steel, 40CrNiMoA combined steel, 40CrNiMoA steel, alloy structural steel referred to as combined steel, 40CrNiMoA is one of the combined steel, also known as alloy steel, it is based on high-quality carbon structural steel, appropriately add one or more alloying elements (the total content does not exceed 5%) to make steel grades.Common quality defects of bearing parts after heat treatment are: overheating of the quenched microstructure, underheating, cracks in the quenched microstructure, insufficient hardness, deformation during heat treatment, surface decarbonization, soft spots, etc

Chemical Composition

 C

Si

Mn

S

P

Cr

Ni

Cu

Mo

0.37~0.44

0.17~0.37

0.50~0.80

Allowable residual content ≤0.025

Allowable residual content ≤0.025

0.60~0.90

1.25~1.65

Allowable residual content ≤0.025

0.15~0.25

Mechanical Properties

Yield
strength

Tensile
strength

Elongation

Rate of
reduction
 in area

Impact
absorbing
 energy

Material
 Brinell
Hardness

Sample
size

 ≥ 835 MPa

≥ 980 MPa

≥12%

 ≥55%

≥ 78 J

≤ 269 (Annealed or high temperature
 tempered
steel rod)

25mm

Application:

It is used as a more important quenching and tempering part that requires high strength, high toughness, large cross-section size, such as the transmission eccentric shaft of a horizontal forging machine, the crankshaft of a forging machine, etc. After quenching and tempering, it is used to make important parts that require good plasticity, high strength and large size.For heavy machinery, high-load shafts, 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 make important parts with special performance requirements after nitriding treatment

Heat treatment specification

  • First quenching heating temperature: 850 °C (Quenchant– oil)
  • Tempering heating temperature: 600 °C (Quenchant– water, oil)
Chemical Composition
 CSiMnSPCrNiCuMo
0.37~0.440.17~0.370.50~0.80Allowable residual content ≤0.025Allowable residual content ≤0.0250.60~0.901.25~1.65Allowable residual content ≤0.0250.15~0.25

Why Choose Us?

*Top 20 companies in steel industry trade volume.

*Customized processing steel one-stop purchase.

*Exports of steel exceeded tens of billions for 5 consecutive years.

**We have a complete set of testing equipment, such as ut & ET, hydraulic testing equipment, spectrometer, scanning electron microscope, etc, and have passed SGS TUV

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