White-colored copper alloy with reduced nickel content

Details White-colored copper alloy with reduced nickel content White-colored copper alloy with reduced nickel content

C - Chemistry, Metallurgy

22

C

C22C 9/00 (2006.01) C22C 9/04 (2006.01) C22C 9/05 (2006.01)

Patent

CA 2736881

Disclosed is a white-colored copper alloy comprising by weight up to 30% zinc, up to 20% manganese, up to 5% nickel with the balance copper. This alloy may have from 6% to 25% zinc, from 4% to 17% manganese, from 0.1% to 3.5% nickel and the balance copper. The balance copper in the alloy may further contain at least one of: up to 0.5% of at least one of the group which consists of Sn, Si, Co, Ti, Cr, Fe, Mg, Zr, and Ag; and up to 0.1% of at least one of the group which consists of P, B, Ca, Ge, Se, Te. It may also contain up to 0.3% Zr by weight. The alloy may have an electrical conductivity greater than 2.5% IACS at eddy current gauge exciting frequencies between 60 kHz and 480 kHz.

La présente invention concerne un alliage de cuivre de couleur blanche comprenant en poids jusquà 30 % de zinc, jusquà 20 % de manganèse, jusquà 5 % de nickel et le complément étant du cuivre. Cet alliage peut comprendre de 6 % à 25 % de zinc, de 4 % à 17 % de manganèse, de 0,1 % à 3,5 % de nickel et le complément étant du cuivre. Le complément de cuivre dans lalliage peut contenir en outre au moins lun de : jusquà 0,5 % dau moins lun du groupe constitué de Sn, Si, Co, Ti, Cr, Fe, Mg, Zr, et Ag; et jusquà 0,1 % dau moins lun du groupe qui est constitué de P, B, Ca, Ge, Se, Te. Il peut contenir en outre jusquà 0,3 % de Zr en poids. Lalliage peut avoir une conductivité électrique supérieure à 2,5 % IACS à des fréquences dexcitation de jauge de courant de Foucault comprises entre 60 kHz et 480 kHz.

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