| 摘要 |
PROBLEM TO BE SOLVED: To provide copper alloy based materials for city water which perfectly satisfy standards in leaching testing after conditioning, and are also provided with mechanical properties superior to those of a JIS (Japanese Industrial Standards) forging material. SOLUTION: The materials used for waternetworks comprise, by weight, 2.0 to 5.0% Ni, 2.0 to 5.0% Sn, 0.25 to 0.50% Si and 0.30 to 0.60% Mg, and the balance Cu component. All the metallic components satisfy the standard values stipulated in an ordinance (2000, No.15) of the Ministry of Health, Labour and Welfare. Further, the mechanical workability of a product can be improved while suppressing leaching even if the Mg value is reduced by adding 0.5 to 1.0% Bi as well. COPYRIGHT: (C)2004,JPO
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