Carpenter Stainless Types 309 and 309S are austenitic stainless steels with superior oxidation resistance and high temperature strength compared to Type 304, the basic grade in this series. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-804. Producer or source: Carpenter.