Material Specifications
| Standard | BS 970 EN31 / AISI 52100 / DIN 100Cr6 |
|---|---|
| Type | High-Carbon, High-Chromium Bearing Steel |
| Carbon | 0.95–1.10% C |
| Chromium | 1.20–1.60% Cr |
| Hardness (annealed) | 207–229 HB |
| Hardness (hardened) | 60–65 HRC |
| Wear Resistance | Excellent |
| Dimensional Stability | High (after hardening) |
| Forms Available | Rounds |
Note: EN31 requires careful heat treatment. It should be annealed before machining and then hardened and tempered to achieve service hardness. Do not weld in hardened condition.
Typical Applications
Anti-Friction Bearings — Ball bearings, roller bearings, and bearing races
Dies & Punches — Cold-work tooling where wear resistance is critical
Cutting Tools — Broaches, reamers, and cold-cutting tools
Gauges & Precision Parts — Precision measuring tools and gauge blocks