Patent · US Expired

Copper alloy

US4551187A · kind A · utility

32Cited by

6References

2Claims

0Family size

Assignee

BRUSH WELLMAN, INC. · US

Inventors

Nathan Church · Chagrin Falls, US
W. Raymond Cribb · Mentor, US
John C. Harkness · Lakewood, US

Key dates

Filing date	Jun 8, 1984
Grant date	Nov 5, 1985
Priority date	—
Expiry date	Jun 8, 2004

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K35/222
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

This invention is directed to age hardenable copper beryllium alloys, and to articles and parts made therefrom, which contain special small amounts of beryllium and cobalt; e.g., about 0.2% to about 0.5% beryllium and about 0.2% to about 0.4% cobalt, which, when finished by solution treating, cold working at least about 50% or at least about 70% and age hardening have a superior combination of stress relaxation resistance, formability, ductility, conductivity and strength.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.