400 Series Stainless Steel Balls
ITI manufactures balls from a wide variety of 400 Series stainless steels including 410, 416 and 420, 420A, 440A and 440C. 400 series stainless steel balls are moderately corrosion resistant and can be hardened by heat treating for durability.
300 Series Stainless Steel Balls
Type 300 series or Austenitic stainless steels balls contain a maximum of 0.15% carbon, a minimum of 16% chromium and sufficient nickel and/or manganese to retain an austenitic structure at all temperatures from the cryogenic region to the melting point of the alloy. A typical material for ball manufacture contains a composition of 18% chromium and 8% nickel, commonly – known as 18-8 or 302 stainless steel. Type 316 and 316L stainless steel balls have 2-3% Molybdenum, 10-14% Nickel and 18% Chromium. The alloy addition of molybdenum prevents specific forms of corrosion. Type 316L—extra low carbon grade of 316, generally used in marine applications due to its high resistance to corrosion. ITI is also capable of producing balls from many other type 300 series stainless steels including type 302 balls, type 303 balls, type 304 balls, and type 304L balls.
Super Alloy / Duplex and Other Stainless Steel Balls
ITI manufactures balls from nickel-iron-chromium austenitic material called Alloy 20 balls, also known as Carpenter 20 balls. Carpenter 20 combines excellent corrosion resistance with elevated mechanical properties. ITI also manufactures Duplex stainless steel balls. Duplex stainless steel balls have a mixed microstructure of austenite and ferrite, the aim being to produce a 50/50 mix, although in commercial alloys, the mix may be 40/60 respectively. Duplex steels have improved strength over austenitic stainless steels and also improved resistance to localised corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. They are characterised by high chromium (19–28%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. The most used Duplex Stainless Steel are the 2205 (22% Chromium, 5% Nickel) and 2507 (25% Chromium, 7% Nickel); the 2507 is also known as “SuperDuplex” due to its higher corrosion resistance.
Having Trouble Finding LARGE Diameter Steel Balls?
Large diameter chrome alloy or stainless steel balls are available from stock (1.500″ to 3.000″) or made to order. Need a larger size? Please contact ITI.