41Cr4 | 5140 Alloy Steel for Machinery Parts

41Cr4 |  5140 Alloy Steel for Machinery Parts
41Cr4 |  5140 Alloy Steel for Machinery Parts
41Cr4 |  5140 Alloy Steel for Machinery Parts
41Cr4 |  5140 Alloy Steel for Machinery Parts



41Cr4 | 5140 Alloy Steel for Machinery Parts
 41Cr4 / 5140 Alloy Steel Bar for Machinery Parts, Transmission Parts, Plastic Mold

Hot Rolled Round: dia.10-260 mm
Forged Round: dia.100-1500 mm
Cold Drawn Round: dia.2.5-70 mm

EAF+LF+VD, Hot Rolled or Forged or Cold Drawn, Black surface or Machined surface (Peeled, Turned, Grinded), UT 100% Passed

5140 41Cr4  41CrS4  1.7035 SCr440 40Cr
Chemical Composition(%)
Steel Grade C Si Mn P S Cr
41Cr4 1.7035 0.38-0.45 0.15-0.35 0.50-0.80 ≤ 0.035 ≤ 0.035 0.90-1.20
41CrS4 0.38-0.45 0.15-0.35 0.50-0.80 0.020-0.040 ≤ 0.035 0.90-1.20
5140 0.38-0.45 0.15-0.35 0.50-0.80 ≤ 0.035 ≤ 0.035 0.90-1.20
SCr440 0.38-0.44 0.15-0.35 0.60-0.90 ≤ 0.030 ≤ 0.030 0.90-1.20
40Cr 0.37-0.44 0.17-0.37 0.50-0.80 ≤ 0.035 ≤ 0.035 0.80-1.10

1. One of the most popular grade in mechanical manufacturing industry

2. Good comprehensive mechanical property, good impact toughness in low temperature, low notch sensitivity after heat treatment.

3. Good hardenability, water quenching can reach dia.28-60mm , oil quenching can reach dia.15-40mm

4. Suitable for nitriding and high frequency quenching.

5. Good machinability.


1. For making intermediate speed and medium duty axle parts after Q+T.

2. For making parts with high surface hardness and wear resistance after Q+T and high frequency quenching.

3. For making intermediate speed impact and heavy duty parts after quenching and average tempering.

4. For making low speed impact, heavy duty and wear resistance parts after quenching and low tempering.

5. For making good toughness transmission parts in low temperature after Carbonitriding processing.

6. For making medium size plastic mould.

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