Manufacture of materials and workpieces for components in nuclear plant applications

US5949838A · kind A · utility

Assignee

• Electric Power Research Institute, Inc. · US

Inventors

• Dietrich Alter · Erlangen, DE
• Peter Dewes · Erlangen, DE
• Friedrich Garzarolli · Edenkoben, DE
• Roland Hahn · Germering, DE
• J. Lawrence Nelson · Cupertino, US

Key dates

• Filing date: Feb 27, 1998
• Grant date: Sep 7, 1999
• Expiry date: Feb 27, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S376/90
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of producing austenite steel for use in the radiation zone of a nuclear reactor. The method comprising the steps of forming the austenite steel with about 17% by weight chromium, about 9 to 11.5% by weight nickel, about 0.04% by weight carbon, and iron impurities whose content of silicon is about 0.1% by weight and whose total content of sulfur and phosphorous is less than 0.03% by weight; and exposing the austenite steel to a temperature treatment at a temperature less than 1150 .degree. C. to produce a fine grain lattice with grain diameter features under approximately 20 .mu.m.