Copper-based alloy

Abstract

Provided is a copper-based alloy comprising a brass alloy having excellent dezincification properties, etc., without thermal treatment, as a result of a copper-based alloy characterized by comprising, in % by mass: 63.5%-69.0% Cu; 1.2%-2.0% Sn; <=0.15% Fe; 0.1%-2.0% Pb or 0.5%-1.5% Bi; 0.01%-0.2% Al; 0.06%-0.15% Sb; and a P component being any added component in the range of 0.04%-0.15% when Cu is 63.5%-65.0% and <=0.15% when Cu is 65.0%-69.0%; with the remainder being Zn and unavoidable impurities.

Description

technical field [0001] The present invention relates to a copper-based alloy, in particular to a brass alloy, which is suitable for faucets, valves and other parts in contact with water, and has excellent dezincification resistance, erosion corrosion resistance, stress corrosion cracking resistance and the like. Background technique [0002] Among copper-based alloys, although bronze alloys are excellent in dezincification resistance, erosion corrosion resistance, and stress corrosion cracking resistance when left as they are after casting, they are more expensive than brass alloys. Alloys of brass alloys are in increasing demand. [0003] Patent Document 1 discloses a copper alloy as an alloy excellent in corrosion resistance. The copper alloy contains at least 0.05 to 0.2% by weight in a copper alloy composed of two phases of α phase and β phase Any one or two or more of Sn, 0.05-0.3% by weight of Sb, As or P, the maximum erosion depth is less than 200 μm (JBMA test), and...

AI Technical Summary

Problems solved by technology

[0011] However, Ni is an environmentally hazardous substance, and it is estimated that it will be added to the water quality standards recently, so it is not preferable to add Ni to castings used for faucets and valves.

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