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