AISI 52100 is a high-carbon chromium alloy steel commonly used in bearing applications due to its ability to achieve high hardness, fatigue resistance, and wear resistance through appropriate heat treatment.
AISI 52100 is a high-carbon chromium steel primarily designed for rolling-element bearing applications. Its composition and heat-treatment response allow it to achieve high hardness and resistance to contact fatigue, making it suitable for components subjected to repeated rolling and mechanical stresses.
The material is commonly used in ball bearings, roller bearings, bearing races, precision rollers, and other wear-resistant components. Its performance depends on the heat-treatment condition, cleanliness, dimensional accuracy, and surface finish. The specified bearing standard and required mechanical properties should be confirmed for demanding applications. Typical Applications: Ball bearings, roller bearings, bearing races, precision rollers, and wear-resistant machine components.Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Element | Symbol | Min (%) | Max (%) | Nominal Target |
|---|---|---|---|---|
| Carbon | C | 0.98% | 1.10% | 1.04% |
| Chromium | Cr | 1.30% | 1.60% | 1.45% |
| Manganese | Mn | 0.25% | 0.45% | 0.35% |
| Silicon | Si | 0.15% | 0.35% | 0.25% |
| Phosphorus | P | — | 0.025% | Max 0.025% |
| Sulfur | S | — | 0.025% | Max 0.025% |
| Iron | Fe | Balance | Balance | ~96.8% |
| Condition / Thermal State | Tensile Strength (Rm) | Yield Strength (Re) | Elongation (A5) | Hardness (HBW / HRC) |
|---|---|---|---|---|
| Spheroidize Annealed | 580 – 670 MPa | 380 – 450 MPa | 20% – 28% | 170 – 207 HBW |
| Cold Drawn (Annealed Stock) | 680 – 780 MPa | 550 – 650 MPa | 10% – 16% | 200 – 240 HBW |
| Normalized (870°C) | 850 – 980 MPa | 520 – 620 MPa | 12% – 18% | 250 – 300 HBW |
| Quenched & Tempered (Bearing Core) | 2,000 – 2,300 MPa | 1,700 – 1,950 MPa | 2% – 5% | 60 – 64 HRC (650 – 750 HB) |
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