High-mechanical strength copper alloy

Metal treatment – Stock – Copper base

Reexamination Certificate

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C420S476000

Reexamination Certificate

active

07090732

ABSTRACT:
A high-mechanical strength copper alloy, which comprises Ni 1.0 to 4.5% by mass, Si 0.2 to 1.0% by mass, Mg 0.01 to 0.20% by mass, Sn 0.05 to 1.5% by mass, Zn 0.2 to 1.5% by mass, and S less than 0.005% by mass (including 0% by mass), with the balance being made of Cu and inevitable impurities, wherein the alloy has a tensile strength of 800 N/mm2or more, and wherein the alloy has a stress relaxation ratio of 10% or less.

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