Stainless Steel Balls

Stainless steel balls are divided into 3 big families: Austenitic and Martensitic and Ferritic grades.
Austenitic grades (stainless steel balls) are commonly in use for stainless steel application and are widely known as 300 series. They are the most corrosion resistant of the stainless steel grades. They are recommended when there is a food contact. They have a good resistance to water, oil, steam, alcohol, organic chemicals, oxidant solutions and a relative resistance to sulphuric acid compounds. They are not or lightly Ferro-magnetic. They are not hardened.
Martensitic grades (stainless steel balls) are corrosion resistant and have higher hardness. These grades are Ferro-magnetic. They can be used in water, oil, steam, alcohol. They are mainly used where hardness, strength and wear resistance are required.
Ferritic grades resist to corrosion and oxidation, and are resistant to stress corrosion cracking. These steels are Ferro-magnetic but cannot be hardened or strengthened by heat treatment. They are more corrosive resistant than the Martensitic grades, but inferior to the austenitic grades.AISI 420