Reduced lead bismuth yellow brass

Details Reduced lead bismuth yellow brass Reduced lead bismuth yellow brass

1997-07-18

1999-03-09

Ip, Sikyin

Metal treatment

Stock

Copper base

420428, 420429, C22C 904

Patent

active

058794778

ABSTRACT:
Reduced lead bismuth yellow brasses are disclosed that are primarily useful for plumbing applications. Very low levels of grain refiners are used to increase dezincification resistance, to improve polishability, and for other desired characteristics. At least two grain refiners are selected from the group consisting of B, In, Ag, Ti, Co, Zr, Nb, Ta, Mo, Ga, Tl, and V. At least one of the grain refiners is selected from the group consisting of B, Ti, Co, Zr, Nb, Ta, Mo, Ga, Tl, and V and is between 0.0001% and 0.01% of the alloy. If Ag or In is a selected grain refiner, it is less than 0.25% of the alloy. Silver and gallium are preferred grain refiners.

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