COPPER ALLOY NOS. C44400 and C44500 are copper-zinc-tin alloys inhibited by antimony and phosphorus, respectively. They are commonly known as inhibited admiralty metal or admiralty brass. They have a good combination of strength and ductility and good resistance to general corrosion. The small addition of inhibitor is made to minimize the alloy’s susceptibility to dezincification and stress corrosion. They are used for condenser, evaporator and heat-exchanger tubes and associated applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CU-599. Producer or source: Copper and copper alloy mills.

AMBRALOY 687 is a copper-zinc-aluminum-arsenic alloy. It is effectively inhibited against dezincification by the small but strictly regulated addition of arsenic (nominally 0.04%). It is superior to Admiralty Metal (Copper Alloys No. C44300, C44400 and C44500) where water is contaminated by sewage, where velocities are higher than normal, and where impingement is more severe than normal. Typical uses are condenser and heat-exchanger tubes, distiller tubes and ferrules. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-459. Producer or source: ARCO Metals Company, American Brass. See also Alloy Digest Cu-213, March 1970.