Low carbon plus nitrogen free-machining austenitic stainless steels with improved machinability and corrosion resistance

US4933142A · kind A · utility

Assignee

• Crucible Materials Corporation · US

Inventors

• Walter T. Haswell, Jr. · Jamesville, US
• Kenneth E. Pinnow · Pittsburgh, US
• John J. Eckenrod · Dorpsstraat, US
• Geoffrey O. Rhodes · Butler, US

Key dates

• Filing date: Feb 3, 1989
• Grant date: Jun 12, 1990
• Expiry date: Feb 3, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/40
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A low carbon plus nitrogen, free-machining, austenitic stainless steel having improved machinability and excellent corrosion resistance. The steel composition in weight percent is carbon plus nitrogen up to about 0.06, chromium 16 to 20, nickel 6 to 14, manganese up to 0.60, sulfur 0.15 to 0.50, silicon up to about 1, phosphorus up to about 0.20, molybdenum up to about 1 and balance iron.