Shielding gas mixture for gas-metal electric arc welding

Application Number: 00119212
Application Date: 2000.05.22
Publication Number: 1274631
Publication Date: 2000.11.29
Priority Information: 1999/5/24 US 09/317370
International: B23K9/16;B23K35/38
Applicant(s) Name: Praxair Technology, Inc.
Inventor(s) Name: William De Abreu Macedo;Richard De Castro Torres
Patent Agency Code: 72001
Patent Agent: wang shihao
Abstract A shielding gas mixture for gas-metal arc welding of austenitic stainless steel is provided in which the gas mixture comprises from about 2 to about 5% carbon dioxide, from about 1 to about 4% nitrogen, and the balance being argon. Also, a process for welding austenitic stainless steel is provided by forming an electric arc between a nonconsumable electrode and the workpiece and in which the gas mixture is used.