Our inventory now includes Alloy 309/309S (UNS S30900/S30908) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.
Alloys 309 and 309S are austenitic chromium-nickel stainless steels that are often used for higher temperature applications. Due to their high chromium and nickel content, Alloys 309 and 309S are highly corrosion resistant, have outstanding resistance to oxidation, and excellent heat resistance while providing good strength at room and elevated temperatures. The only significant difference between 309 and 309S is the carbon content. Alloy 309S has a much less carbon composition which minimizes carbide precipitation and improves weldability.
Specifications:Â UNS S30900/S30908