Lead-free copper alloy for casting with excellent mechanical properties
US8470101B2 · kind B2 · utility
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Key dates
| Filing date | May 17, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | May 17, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C32/0089
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a lead-free copper alloy for casting which contains 0.1-0.7% of S, 8% or less (excluding 0%) of Sn, and 6% or less (excluding 0%) of Zn, and in which a sulfide is dispersed and the average spheroidization ratio of the sulfide is 0.7 or greater. Due to this constitution, said lead-free copper alloy for casting has excellent mechanical properties such as strength, high pressure resistance and good machinability and, therefore, is useful as a starting material for faucet metal fittings, water faucet and so on, even though the alloy contains no lead which causes deterioration of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.