Ferritic stainless steel for use in high temperature applications

US6773660B2 · kind B2 · utility

Assignee

• SANDVIK AB · SE

Inventors

• Magnus Cedergren · Sandviken, SE
• Kenneth Göransson · Luleå, SE

Key dates

• Filing date: Oct 2, 2002
• Grant date: Aug 10, 2004
• Expiry date: Oct 2, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A hot workable ferric stainless steel alloy resistant to thermal cyclic stress and oxidation at elevated temperatures having improved mechanical properties rendering it especially suitable as a substrate for exhaust gas purifying applications, such as catalytic converters or heating applications, has a composition including (in weight-%):C≦0.05%;Cr16.0-24.0%;Nimore than1.0-15.0%;Al4.5-12.0%;Mo + W≦4.0%;Mn≦1.0%;Si≦2.0%;Zr + Hf≦0.1%;REM≦0.1%;N≦0.05%;andbalance Fe and normally occurring steelmaking impurities and additions.