Stainless Steel Ball | MAT. NO. | DIN | AISI/SAE | MAIN APPLICATIONS | Hardened Stainless Steel Ball | 1.4021 | - | 420A | Similar to that of AISI 420C balls, when required hardness and wear resistance are lower. | 1.4028 | - | 420B | 1.4034 | - | 420C | Special bearings, anti-friction bearings, special pumps, recirculating balls, lighters, pens, automotive seatbelts & components. | 1.4125 | - | 440C | Precision bearings,anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. Used in foodstuff, medical instruments, quick couplings, recirculating ball bearings, knotting devices, oil refinery devices. | 1.4057 | - | 431 | Special pumps and valves,used in the aircraft, foodstuff and naval field. |
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