Definition
A high-carbon, high-alloy chromium steel commonly used as the standard material for ball and roller bearings. It is known for its high hardness, strength, and long fatigue life under rolling contact loads.
Features
- Very high hardness after heat treatment (typically 60–66 HRC)
- Excellent resistance to fatigue damage under rolling contact
- High strength and dimensional stability
- Good machinability in the annealed state
- Low corrosion resistance – requires protective lubrication
- Uniform and fine microstructure after heat treatment
- Industry standard material for bearing applications
Applications
- Ball, roller, and needle bearings
- Bearing balls and rollers
- Bearing rings for both general and high-load applications
- Precision rolling components in industrial machinery
- Applications with high radial and dynamic loads
- Automotive and industrial sectors requiring long fatigue life
Conclusion
2100 is the most widely used bearing steel worldwide. It offers high hardness, dimensional stability, and fatigue resistance, making it a reliable material for rolling bearings and precision steel components across a broad range of engineering applications.
