Aluminum 4043 is an aluminum-silicon standard welding wire alloy recommended for the welding of non-heat treatable and heat treatable aluminum alloys. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness. It also includes information on corrosion resistance as well as joining. Filing Code: Al-184. Producer or source: Various aluminum companies.