Cobalt 21 Electrode

  Nominal Chemistry AWS  SPECIFICATION
  C Mn Si Cr Ni Mo Fe W Co
Min 0.15 2.0 1.5 25.0 1.5 4.5 3.0   BA  
Max 0.40 max Max 30.0 4.0 7.0 MAX   BAL  

 

Deposited Chemical Composition WELDMETAL UNDILUTED
  C Mn Si Cr Ni Mo Fe W Co
0.25 0.7 1.1 28.0 3.0 5.5 2.2   BAL

 

HARDNESS UNDILUTED TYPICAL 31 HRC

HARDFACING PROCESSES
GTAW PLASMA OXYFUEL GAS

DIAMETER RODS AVAILABLE
2.5MM 3.2MM 4.0MM 4.8MM 5.0MM 6.4MM 8MM

Application
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.

Class: ECoCr-E

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