|Nominal Chemistry AWS SPECIFICATION|
|Deposited Chemical Composition WELDMETAL UNDILUTED|
HARDNESS UNDILUTED TYPICAL 31 HRC
GTAW PLASMA OXYFUEL GAS
DIAMETER RODS AVAILABLE
2.5MM 3.2MM 4.0MM 4.8MM 5.0MM 6.4MM 8MM
Cobalt Electrodes #21 Welds have very good strength and ductility at temperatures up to 1600°F (871°C). Deposits are resistant to thermal shock, and oxidizing and reducing atmospheres. The deposit is a solid-solution-strengthened alloy with a relatively low weight-percent carbide phase in the microstructure. Hence, the alloy is very tough and will work harden. Deposits possess excellent self-mated galling resistance and also are very resistant to cavitation erosion. Typical applications include guide rolls, hot extrusion and forging dies, hot shear blades, tong bits, and valve trim.