| 摘要 |
Reduced-lead yellow brass alloys are disclosed. The alloys comprise copper; zinc; an amount of bismuth effective to enhance castability of the alloys; and an amount of selenium effective to increase machinability of the alloy. Preferably, the alloys further include an amount of antimony effective to inhibit dezincification of the alloys. In a particularly preferred embodiment, an alloy according to the present invention comprises zinc; copper in an amount ranging from about 62.5 % to about 64.0 % by weight; tin in an amount ranging from about 0.2 % to about 0.4 % by weight; iron in an amount ranging from about 0.1 % to about 0.3 % by weight; nickel in an amount ranging from about 0.15 % to about 0.25 % by weight; aluminum in an amount ranging from about 0.3 % to about 0.6 % by weight; bismuth in an amount ranging from about 0.8 % to about 1.0 % by weight; antimony in an amount ranging from about 0.02 % to about 0.04 % by weight; and selenium in an amount ranging from about 0.05 % to about 0.25 % by weight. The disclosed alloys exhibit excellent castability, machinability, and polishability, and, when used in decorative plumbing fixtures, will not dezincify nor leach lead into potable water.
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