Thermak 17 is a high-temperature ferritic stainless steel alloy with oxidation resistance to 1093 deg C (2000 deg F). This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1239. Producer or source: AK Steel Corporation.