Bearing steels such as GCr15 (equivalent to 52100) remain the backbone of precision motion systems. Their deep hardening, high wear resistance, and dimensional stability support demanding applications in automotive, mining, robotics, and industrial machinery.
Why Bearing Steel Has Exceptional Wear Resistance？
GCr15 contains high carbon and chromium levels, forming hard carbide particles that deliver:
- Long fatigue life
- Superior surface wear resistance
- Dimensional stability under heat
These properties make the steel ideal for bearings, rollers, sleeves, and precision rings.
Essential Applications
Automotive Bearings
Wheel bearings, transmission bearings, differential bearings.
Industrial Machinery
Gear reducers, rolling mills, spindles.
High-Precision Systems
Robotics, aerospace bearings, measurement instruments.
Heat Treatment Behavior
GCr15 can reach HRC 60–64 after quenching, providing:
- Uniform hardness
- Excellent fatigue resistance
- Controlled distortion when processed correctly
Global Equivalents
| GB | ASTM | JIS | DIN |
|---|---|---|---|
| GCr15 | 52100 | SUJ2 | 100Cr6 |
These equivalents allow global OEMs to adopt Chinese materials without modifying technical drawings.
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