Patent · US Active

High strength aluminium alloy extrusion

US8313590B2 · kind B2 · utility

0Cited by

15References

19Claims

0Family size

Assignee

Rio Tinto Alcan International Limited · CA

Inventors

Nicholas Charles Parson · Banbury, GB
Martin Fortier · Saguenay, CA

Key dates

Filing date	Dec 3, 2009
Grant date	Nov 20, 2012
Priority date	—
Expiry date	Dec 3, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF28F21/084
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

An aluminium extrusion having a minimum section thickness and made from an aluminium alloy includes, in weight percent, between approximately 1.0 and 1.7 manganese, and between approximately 0.5 and 1.1 silicon, less than 0.3 iron with the balance being Al and inevitable impurities each less than 0.05 weight % and totaling less than 0.15 weight %, the extrusion being formed with an extrusion ratio less than 125 to retain a fibrous grain structure in which less than 40% of the minimum section thickness is recrystallized.

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