Abstract ATI 301 (UNS S30100) is an austenitic stainless steel with a nominal composition of 17 percent chromium and 7 percent nickel. The high strength of this grade of steel in the six available conditions or tempers, its resistance to atmosphere corrosion, and its bright, attractive surface make it an excellent choice for decorative structural applications. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive strength as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming and heat treating. Filing Code: SS-1359. Producer or source: ATI.