Iron-nickel alloy

US8808475B2 · kind B2 · utility

Assignee

• Outokumpu VDM GmbH · DE

Inventors

• Bodo Gehrmann · Plettenberg, DE
• Bernd Boer · Altena, DE

Key dates

• Filing date: Jan 26, 2007
• Grant date: Aug 19, 2014
• Expiry date: Sep 17, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a creep-resistant low-expansion iron-nickel alloy that is provided with increased mechanical resistance and contains 40 to 43 wt. % of Ni, a maximum of 0.1 wt. % of C, 2.0 to 3.5 wt. % of Ti, 0.1 to 1.5 wt. % of Al, 0.1 to 1.0 wt. % of Nb, 0.005 to 0.8 wt. % of Mn, 0.005 to 0.6 wt. % of Si, a maximum of 0.5 wt. % of Co, the remainder being composed of Fe and production-related impurities. Said alloy has a mean coefficient of thermal expansion <5×10<−6>/K in the temperature range of 20 to 200 DEG C.