Strip material with excellent corrosion resistance after brazing

US10156000B2 · kind B2 · utility

Assignee

• Gränges Sweden AB · SE

Inventors

• Anders Oskarsson · Högsby, SE
• Scott Haller · Richmond, US
• Bevis Hutchinson · Bromma, SE

Key dates

• Filing date: Jul 26, 2013
• Grant date: Dec 18, 2018
• Expiry date: Jan 19, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12764
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A corrosion resistant strip is disclosed. The strip comprises a core, and an interlayer adapted to be located between the core and an optional Al—Si based clad. The interlayer has a composition essentially consisting of (in percentages by weight): Si≤0.9%, Fe≤0.7%, Cu≤0.5%, Mn 0.5-1.8%, Mg≤0.7%, Zn≤4.0%, Ni≤1.5%, elements selected from group IVb, Vb, and/or VIb of the periodic table ≤0.3% each and ≤0.5% in total ≤0.05 wt % each and ≤0.15% in total, of unavoidable impurity elements, balance Al. The core is more noble than the interlayer after brazing. The interlayer exhibits a volume fraction of a texture component of at least 30%.