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: UNS S30900/S30908
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310S Stainless Steel
Alloy 310S is an austenitic stainless steel developed for use in high temperature corrosion resistant applications.
316 Stainless Steel
Annealing 316 stainless steels require heating to between 1900-2100°F (1038-1149°C) before rapidly quenching.
316L Stainless Steel
Grade 316L is the std molybdenum-bearing grade, 2nd in imp. to 304 amongst the austenitic stainless steels.