These Stainless Steel balls go through two processes - annealing (where they're heated quickly and allowed to cool slowly) and passivation (where a light coating of metal oxide is applied) - both of which help them resist corrosion more effectively.
Benefits
Because they're resistant to corrosion, these balls are highly suitable for use in the food industry or where oxidising solutions and organic chemicals are present. This, blended with material toughness makes them many companies' first choice for use in a wide range of demanding environments. Note: these balls are not resistant to sulphuric acid.
Use
You'll find them widely used in valves, aerosols and finger pumps (spray, dispenser and trigger sprays) as well as household items like coffee makers and grinders.
International Equivalents
DIN X5 CR Ni 18.09, AFN Z6 CN 18.09, EN58E, JIS SUS 304 Wks 1.4301