Nickel-Copper Alloys 505 and 506 are strong castings alloys. Both alloys combine high strength with good wear resistance. Alloy 505 (4% silicon) is employed where exceptional resistance to galling is needed. Alloy 506 (3% silicon) is recommended where good (but not exceptional) galling resistance is sufficient. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion and wear resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Ni-215. Producer or source: Nickel alloy casting producers.