Project 70 and Project 7000 Type 304L stainless steels are improved machining versions of conventional AISI Type 304L stainless steel. They have higher tensile and creep strengths than conventional 18-8 stainless steels. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-513. Producer or source: Carpenter. Originally published July 1990, revised November 1997.