Stainless steel ball

440C:
Give maximum hardness with good corrosion resistance to fresh water, steam, crude oil, and gasoline, perspiration, alcohol, and blood and food environment.

420:
Offer good hardness and surface finish.

320/304:
Offers excellent corrosion resistance in organic, acid, oxidizing, food environment, etc.

316:
With the addition of molybdenum improves corrosion resistance particularly to sculpture acid compounds.