St. Joseph DS-LEAD (DSL) is a wrought product consisting of 99.9% pure lead matrix strengthened by an extremely fine dispersion of lead oxide particles. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and creep. It also includes information on forming, heat treating, machining, and joining. Filing Code: Pb-6. Producer or source: St. Joseph Lead Company.