Martensitic hardened stainless steel balls, they feature remarkable hardness, wear resistance, surface finishing, narrow dimensional tolerances. For that reason this type of steel is frequently used in precision devices. Balls are provided in the passivated condition.
Precision bearings, anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. They are used in foodstuff, medical instruments, quick couplings, recirculating ball bearings, knotting devices, oil refinery devices.
| International Standard | |||
| AISI | DIN | GB | JIS |
| 440C | 1.4125 | 9Cr18Mo | SUS440C |
| Chemical Composition | |||||||
| Type | %C | %Si | %Mn | %P | %S | %Cr | %Mo |
| 440C | 0.95 - 1.20 | 1.00 Max | 1.00 Max | 0.040 Max | 0.030 Max | 16.00 - 18.00 | 0.750 Max |
| Physical Property | |
| Corrosion Resistant | Fair |
| Wear Resistant | Excellent |
| Magnetism | Yes |
| Mechanical Data | |
| Hardness | HRC 57 - 65 |
| Density | 7.75g/m3 |
| Young's Modulus | 210GPa |
| Tensile Strength | 275,000 - 290,000 psi |
| Basic Specification | |
| Diameter | 0.4mm - 50mm |
| Grade | G100 - G1000 |
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