Lead-free brass alloy
US8293034B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Mar 25, 2010 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Mar 25, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C9/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a lead-free brass alloy, including 0.3 to 0.8 wt % of aluminum, 0.01 to 0.4 wt % of bismuth, 0.05 to 1.5 wt % of iron and more than 96 wt % of copper and zinc, wherein the copper is present in an amount ranging from 58 to 75 wt %. The brass alloy of the present invention meets the standard of the environmental regulation, wherein the lead content is less than 0.25 wt % based on the weight of the alloy. Further, the brass alloy of the present invention has 0.05 to 1.5 wt % of iron and less than 0.4% of bismuth, so as to lower production cost, eliminate cracks and increase production yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.