| 摘要 |
PROBLEM TO BE SOLVED: To choose a metallic material used for a material and equipment for water supply, with a new environmental sense again. SOLUTION: This copper for the material and equipment used for pipelines of waterworks in water supply comprises a composition of 2.5-5.0 wt.% Ni, 2.5-5.0 wt.% Sn, and the balance Cu, controlling such metallic elements as to satisfy the reference value determined in a ministerial ordinance (NO.12 in 2,000) of Ministry of Health and Welfare, in the leaching test according to the leaching test method established by Japan Water Works Association, and having such mechanical properties as tensile strength of 315 MPa or higher and elongation of 15% or higher. The material is chosen from a new viewpoint of a value of leached metal ions, and is in advance of a demand of the new environmental age. COPYRIGHT: (C)2004,JPO
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