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Stainless Steel 309


Stainless 309 offers a better corrosion resistance than the type 304 because of higher percentages of nickel and chromium. This alloy has been used for furnace parts, high temperature containers, weld wire, and fire box sheets.

Specifications:ASTM A167, ASTM A249, ASTM A276, ASTM A312, ASTM A403

C (Carbon content) 0.08
MN 2
P 0.04
Si 1
S 0.03
Cr 22.0 - 24.0
Ni 12.0 -15.0
Mo 0.75
Co
Cu 0.5
V (Vanadium content)  
Ti (Titanium contenet)  
Al (Aluminum content)  
Fe (Iron content)  
cb+Ta  
Zr (Zirconium content)  

Material Notes: 

Characteristics: comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than common austenitic alloys. Good creep deformation resistance.
Applications:Heat treatment industry-conveyor belts, rollers, burner parts, refractory supports, retorts linings, oven linings, fans, tube hangers, baskets, and trays. Chemical process industry- containers for hot concentrated acids, ammonia, and sulfur dioxide. Food processing industry- used in contact with hot acetic and citric acid.
Information provided by Allegheny Ludlum


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