| 440C（9Cr18Mo）Stainless Steel Balls
440C (9Cr18Mo) stainless steel balls are widely used in products such as oilfield pumps, spray guns, stainless steel bearings, and more. They have a hardness of HRC58°--60°. With higher wear resistance compared to 440, they are magnetic, have moderate corrosion resistance, and pass salt spray testing for 48 hours without rusting in water with a salt content of 5%.
Available precision grades: G10—G200 Specifications: 1.5mm—60mm
Chemical CompositionGrade | C | Si | Mn | P≤ | S≤ | Ni③ | Cr | Mo③ | 440C | ≤0.95～1.10 | ≤0.80 | ≤0.80 | 0.035 | 0.03 | ≤0.60 | 16～18 | 0.40～0.70 |
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