Materials for rolling bearings
Standard material for rings and balls is a vacuum degassed high carbon chromium steel allowing for high efficiency, low torque, low noise level and long bearing life. For bearings requiring anti-corrosion or heat-resistance properties, martensitic stainless steel is used.
CHEMICAL COMPOSITION OF BEARING MATERIALS
| MATERIAL | SYMBOL | CHEMICAL COMPOSITION (Wt%) | EQUIVALENT |
HARDNESS (HRC) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Mo | ||||
| HIGH CARBON CHROMIUM STEEL | 100Cr6 | 0,95~1.10 | 0,15~0,35 | ≤0,50 | ≤0,025 | ≤0,025 | 1,30~1.60 | ≤0,08 | SAE52100, SUJ2, ASTM52100, BS535A99, 1.3505 | 58~62 |
| STAINLESS STEEL | AISI440C | 0,95~1.10 | ≤1,00 | ≤1,00 | ≤0,040 | ≤0,030 | 16,0~18,0 | ≤0,75 | X102CrMo17, X105CrMo17, 1.4125, 1.3543 | 58~62 |
| KS440 (ACD34) | 0,60~0,75 | ≤1,00 | ≤1,00 | ≤0,030 | ≤0,020 | 11,5~13,0 | ≤0,30 | X65Cr13, 1.4037 | 58~62 | |