309 Stainless Steel
Stainless 309 is an austenitic chromium nickel stainless steel and offers a better corrosion resistance than the type 304 because of higher percentages of nickel and chromium. Suitable for parts requiring both corrosion and heat resistance and oxidation resistance up to 2000 °F. Strength at elevated temperatures is similar to that of 18-8 Stainless Steels. This alloy posses excellent resistance to oxidation as well as high tensile and creep strengths at elevated temperatures. It is generally considered as a heat-resisting alloy.