ARMCO 439 HIGH PERFORMANCE-10 is a ferritic stainless steel sheet and strip alloy suited to automotive-exhaust system applications where oxidatin resistance is needed at temperatures beyond the capability of AISI Type 409 to withstand. The alloy also has good resistance to wet chloride environments. 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, and joining. Filing Code: SS-486. Producer or source: Armco Inc., Specialty Steels Division.