SUS440C Stainless steel ballll
| Material Specification | C | Cr | Mn | Si | P | S | Mo |
| 0.95-1.20% | 16-18% | 1.0%Max | 1.0%Max | 0.04%Max | 0.03%Max | 0.75%Max | |
Mechancial Properties | Tensile Strength | 285,000 psi | |||||
| Yield Strength | 275,000 psi | ||||||
| Density | 0.277 Ibs/cu in | ||||||
Physical Property | Corrosion resistance | Fair | |||||
| Magnetic | Yes | ||||||
| Size Range | 0.8mm ( 1/32" ) to 63.5mm ( 2-1/2" ) | ||||||
| Hardness | HRC ≥ 58 | ||||||
| Grade | G10 - G1000 | ||||||
| Application | Type 440C balls are used in bearings , valves , locking mechanisms , fasteners and quick-disconnect couplings . | ||||||
Material Conversion | ASTM / AISI | YB | JIS | ||||
| 440C | 9Cr18Mo | SUS440C | |||||



SUS420 Stainlesss steel ball
| Material Specification | C | Cr | Mn | Si | P | S | |
| 0.15-0.36% | 12-14% | 1.0%Max | 1.0%Max | 0.04%Max | 0.03%Max | ||
Mechancial Properties | Tensile Strength | 275,000 psi | |||||
| Specific Weight | 0.280 Ibs/cu in | ||||||
Physical Property | Corrosion resistance | Fair | |||||
| Magnetic | Yes | ||||||
| Size Range | 0.8mm ( 1/32" ) to 63.5mm ( 2-1/2" ) | ||||||
| Hardness | HRC 50-55 | ||||||
| Grade | G10 - G1000 | ||||||
| Application | Type 420 balls are found in bearings, valves, lighters and writing instruments. | ||||||
Material Conversion | ASTM / AISI | YB | JIS | DIN | |||
| 420 | 3Cr13 | SUS420J2 | 1.4028 | ||||