AISI Type 405 has marginal stainless corrosion resistance. It is used primarily as a structural material. It is serviceable in continuous service up to 1300 F and in intermittent exposures up to 1500 F. It does not harden appreciably when air cooled from high temperatures where some austenite may exist. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-129. Producer or source: Alloy steel mills and foundries. Originally published March 1962, revised April 1988.