German Standard En Din 42crmo4 Steel First Choice For High Precision Transmission Parts - China

For high-precision transmission parts (such as gears, shafts, couplings, etc.

), EN DIN 42CrMo4 (1.7225) steel is a common and reliable choice, but it needs to be evaluated in combination with specific working conditions and process requirements.

Application considerations for high-precision transmission parts

1 - Dimensional stability:

Precision transmission parts are sensitive to heat treatment deformation and require strict control of the quenching and tempering process (such as austempering) or subsequent finishing (grinding, honing).

2 - Fatigue life:

The fatigue limit of EN DIN 42CrMo4 steel is relatively high, but surface defects (such as knife marks and decarburization) must be avoided.

It is recommended to use shot peening or polishing processes.

Typical application scenarios

- **Recommended**: heavy-duty gears, precision transmission shafts, aviation/automotive gearbox components.

- **Use with caution**: extreme low temperatures (<-40°C) or highly corrosive environments (requires plating or material replacement).

Conclusion

EN DIN 42CrMo4 steel is the preferred material for high-precision transmission parts, especially for applications that require high strength, wear resistance and fatigue life.

It is recommended to verify the specific load, environment and process chain (such as heat treatment deformation control), and optimize the design through finite element analysis (FEA) simulation when necessary.

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