Brass alloy

US5630984A · kind A · utility

Assignee

• Ideal-Standard GmbH · DE

Inventors

• Helmut Waschke · Stein, DE
• Leopold Sauer · Wittlich, DE

Key dates

• Filing date: Mar 13, 1996
• Grant date: May 20, 1997
• Expiry date: Mar 13, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49405
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A brass alloy having a composition (wt %) as follows: Cu: 57-65%; Bi: 0.3-1.5%; Al: 0.4-0.8%; B: 5-15 ppm; impurities 0-1%, and Zn as remainder. A brass alloy whose Cu content is set to 57-65 wt % and whose further alloying constituents do not exceed 3 wt % can be cast into a chill mold without any problems and, additionally, solidifies from the melt relatively finely grained and thus virtually free of shrinkholes. Further, grain refining with boron is possible in spite of a Cu content that is increased compared to the known alloys, if the elements Mn, Si and Sb are added by alloying in amounts according to the invention and if, simultaneously, the Fe content can be limited to a maximum of 0.25 wt %. Furthermore, the alloy is provided with enhanced hot shortness if the Sn content is as low as possible but, at least, does not exceed 0.25 wt %. The occurrence of hard inclusions is strongly repressed.