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Stainless steel balls

Stainless Steel Balls
AISI 302/304/316/316L/420/440/440C

Stainless Steel, also called Inox Steel, is steel that contains more than 12% chromium, with or without other alloying elements. Stainless steel resists corrosion, maintains its strength at high temperatures and is easily maintained.

APPLICATIONS: Some common uses of stainless steel balls are as vibratory polishing media, as valves for dispenser spray pumps, as agitators in personal care products like nail polish bottles, in machine bearings, automobiles sub assemblies, in drawer slides, as grinding media for cocoa and chocolate liquo

The most common grades of stainless steel balls are:
AISI 304. The most commonly specified austenitic (chromium-nickel stainless class) stainless steel, which accounts for more than half of the stainless steel produced in the world. This grade withstands ordinary corrosion, is durable and resists most chemicals.
AISI 316. Austenitic (chromium-nickel stainless class) stainless steel containing 2%-3% molybdenum (whereas 304 has none). The inclusion of molybdenum gives 316 greater resistance to various forms of deterioration.
AISI 420. Martensitic stainless steel. Has 12% chromium. Can be hardened and tempered like alloy steels. This steel is magnetic.
AISI 430. The most widely used ferritic (plain chromium stainless category) stainless steel, offering general-purpose corrosion resistance (lower than AISI 304). Doesnot contain any Nickel. This steel is magnetic.
AISI 302. Has almost the same chemical composition as 304 with slightly more carbon content and less chromium. Corrosion resistance is more than AISI 430 but less than 30

Corrosion Resistance: AISI 316 > 304 > 302 > 430.
Hardenability: The above stainless steel (except AISI 420) are not hardenable by heat treatment. Some work-hardening takes place during cold-forging.
Magnetism: Whereas AISI 430 is magnetic; AISI 304 and 302 are slightly magnetic and AISI 316 is non magnetic. However, in the manufacture of steel balls and media during the cold working process (cold forging / heading) slight magnetism is induced in all the stainless steel types.
Passivation: The stainless steel balls are passivated after final polish. Carryover iron and other contaminants are removed and a surface film prevents atmospheric and water corrosion on stainless steel balls.

. Carbon
C
Manganese
Mn
Silicon
Si
Phosphorus
P
Sulphur
S
Nickel
Ni
Chromium
Cr
Molybdenum
Mo
AISI 302 0.15 max 2.00 max 1.00 max 0.045 max 0.03 max 8.0-10.0 17-19 Nil
AISI 304 0.08 max 2.00 max 1.00 max 0.045 max 0.03 max 8.0 -10.5 18-20 Nil
AISI 304L 0.03 max 2.00 max 1.00 max 0.045 max 0.03 max 8.0 -10.5 18-20 Nil
AISI 316 0.08 max 2.00 max 1.00 max 0.045 max 0.03 max 10-14 16-18 2-3
AISI 316L 0.03 max 2.00 max 1.00 max 0.045 max 0.03 max 10-14 16-18 2-3
AISI 420 0.15 min 1.00 max 1.00 max 0.040 max 0.03 max Nil 12-14 Nil
AISI 430 0.12 max 1.00 max 1.00 max 0.040 max 0.03 max Nil 14-18 Nil