1）材料：AISI 440C 
2）直径:0.5.mm~25.4mm 
3）级别:G10~G500.
4）硬度:HRC58~65.
5）证书:ISO-9001, TS-16949,ISO14001
6）生产工艺要求较高，国内能生产不锈钢球440C的企业比较少，因此能够生产此材质钢球的企业常常被冠名以特殊钢的美誉。热处理工艺复杂，易开裂，且精度要求高，是硬度的不锈钢球。
440C材质精密不锈钢球应用:通常用于航空、航天、精密轴承、微型电机、高精密仪器、阀门、石油等领域。

440C材质精密不锈钢球AISI 440C balls are a martenistic-type stainless steel, which is used extensively in bearing applications that require corrosion-resisting properties.440C balls are resistant to corrosion from fresh water, steam, crude oil, gasoline, perspiration, alcohol, blood and foodstuffs.Maximum resistance to corrosion and tarnishing is only achieved when 440C is fully hardened and surfaces are polished to a high luster.HRT provides 440C balls in vacuum melt condition upon request.