Magnesium alloys

US4239535A · kind A · utility

Inventors

• John F. King · San Francisco, US
• William Unsworth · Aspull, GB

Key dates

• Filing date: May 31, 1979
• Grant date: Dec 16, 1980
• Expiry date: May 31, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C23/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A magnesium alloy for casting contains from 2 to 10% of zinc and from 0.5 to 5% of copper as essential constituents, aluminium being substantially absent. The alloy as cast has a fine grain size, making a grain refinement step unnecessary and has favorable mechanical properties, especially after heat treatment. Other constituents such as up to 2% manganese can be added to improve particular properties.