Copper alloy member for water works

Details Copper alloy member for water works Copper alloy member for water works

C - Chemistry, Metallurgy

22

C

C22C 9/04 (2006.01)

Patent

CA 2611919

A water supply member of copper alloy that while minimizing the content of lead, maintains the same levels of mechanical properties, castability, cutting easiness, pressure resistance, etc. as those of conventional lead-employing copper alloy. There is provided a copper alloy comprising 2.0 to 5.9 wt.% tin, 1.5 to 5.0 wt.% nickel, 5.0 to 12.1 wt.% zinc, 0.4 to 3.3 wt.% bismuth, 0.009 to 0.15 wt.% phosphorus and the balance of copper and impurities.

L'invention concerne un élément en alliage de cuivre utilisé pour l'alimentation en eau, qui, tout en ayant une teneur minime en plomb, maintient le même niveau de propriétés mécaniques, de coulabilité, de facilité de découpe, de résistance à la pression, etc., que les alliages de cuivre conventionnels utilisant du plomb. L'invention concerne donc un alliage de cuivre comprenant de 2,0 à 5,9 % en poids d'étain, de 1,5 à 5,0 % en poids de nickel, de 5,0 à 12,1 % en poids de zinc, de 0,4 à 3,3 % en poids de bismuth, de 0,009 à 0,15 % en poids de phosphore, le reste étant du cuivre et des impuretés.

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