QQ-B-639B

Abstract

This specification covers four alloys of leaded and nonleaded naval brass flat products (bar, plate, sheet, and strip) with slit, slit and edge-rolled, sheared, sawed, or machined edges, but does not include flat products with finished edges (see <a>6.6</a>). <b><u>Intended Use:</u></b> Copper alloy number 462 is cold workable and has the best resistance to corrosion by salt water of any of the compositions covered by this specification. It consists principally of alpha grains; has limited hot workability. It is intended for use when cold working, bending, forming, or shaping is required. Copper alloy number 464 possesses excellent hot working properties with fair machinability. It consists of both alpha and beta grains; is hot workable but hardens rapidly on cold working. Copper alloy number 482 possesses good hot working properties and good machinability. It consists of both alpha and beta grains; is moderately hot workable but hardens rapidly on cold working. The material is intended for use when free machining is required. Copper alloy number 482 is more machinable than copper alloy number 464. Copper alloy number 485 possesses good hot working properties, and the machinability is better than copper alloy numbers 464 and 482. It consists of both alpha and beta grains; is moderately hot workable but hardens rapidly on cold working. The material is intended for use when free machining is required and may be used for the following: <pre> Marine hardware Applications where a corrosion-resisting material is needed.</pre> <br>