DURICHLOR 51 SUPERCHLOR is a vacuum treated high silicon iron for corrosive services, especially in the handling of hydrochloric acid in all concentrations. It is also very resistant to most chlorine gas and many destructive chloride-containing solutions. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength. It also includes information on corrosion resistance as well as machining and joining. Filing Code: FE-98. Producer or source: The Duriron Company Inc.