Definition
A corrosion-resistant martensitic chromium steel with a high carbon content. It is used where strength, wear resistance, and corrosion resistance are simultaneously required. Commonly applied in the production of bearings, knives, precision components, and tools.
Features
- High hardness after heat treatment
- Good wear resistance
- Corrosion resistance in mildly aggressive environments
- Good dimensional stability after heat treatment
- Achievable hardness of approximately 58 to 60 HRC
- Suitable for grinding and precision machining
Applications
- Bearing balls and rings
- Precision mechanical components
- Knives and cutting tools
- Valves, pins, shafts
- Medical instruments
- Fine mechanics and instrumentation
Conclusion
440C combines hardness and wear resistance with corrosion resistance. Thanks to this combination, it is a reliable choice for bearings, tools, and precision parts where long service life and performance reliability are essential.
