ATLAS ALLOY 958 is a duplex stainless steel designed to maximize the resistance to chloride corrosion. The alloy is balanced to produce a duplex stainless steel containing austenite dispersed throughout a ferrite matrix. It is an excellent material for pumps and valves in seawater and other aggressive environments. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as casting and heat treating. Filing Code: SS-544. Producer or source: Atlas Foundry & Machine Company.