DOWMETAL M is a manganese type magnesium base alloy which does not respond to hardening heat treatment, but is recommended where maximum formability and weldability are desired. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive, shear, and bearing strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, machining, and joining. Filing Code: Mg-3. Producer or source: The Dow Chemical Company.