IDENTIFICATION
GM ST-21, ERCoCr-E

CLASSIFICATION
AWS/SFA 5.21: ERCCoCr-E

DESCRIPTION
Cobalt base alloy mig wire providing excellent resistance to metal-to-metal wear, thermal shocks, oxidised corrosive environments at high temperatures.

CHEMICAL ANALYSIS (RANGE) %

TYPICAL APPLICATIONS

• Extrusion dies, hot working tools, turbine injectors, valve seats, ingot tong bits.
• Hardfacing of forging dies.

HARDNESS : 22 – 32 RC as deposited 38 – 40 Work hardened.

GENERAL CHARACTERISTICS

• Microstructure : Austenitic matrix with dispersed precipitation of small Cr and Mo Carbides.
• Machinability : Good
• Deposit thickness : Depends upon application and procedure used.
• Shielding gas : Pure argon or argon 98% + oxygen 2%

WELDING PARAMETER