WT-21 Bare Cast Rod (OAW, GTAW/TIG)

Cobalt • AWS A5.21 ERCoCr-E

Key Features

  • Cobalt, high chromium, molybdenum
  • Excellent for corrosion resistance, galling, cavitation, and metal to metal wear resistance
  • Not recommended for severe abrasion
  • These key features are universal to all WT-21 product forms


Typical Applications

  • Steam Valves
  • Hot Shears
  • Chemical and Petrochemical Valves
  • Cavation Repair
  • Forging Dies

Welding Processes

  • Gas Tungsten Arc Welding
  • Oxyfuel Welding

Welding Positions

  • All
DiameterPart NumberRod LengthUnit of Measure
mmInTube915 mm (36 In)5 kg (11.02 lb)
2.43/32B1210-240X915All part numbers shown will
ship in 915 mm (36 in) length

*Additional lengths available upon request
and lead times may vary.
Weartech product is price

*Please contact our Customer Care team
to verify conversion rates.
Deposit Composition(1)
Requirements %C%Mn%Si %Cr %Ni%Fe%Mo%W%CoHardness, Rc
AWS A5.21 ERCoCr-E0.15-0.40 1.5 max 1.5 max 25-301.5-4.03.0 max4.5-7.00.50 maxBalanceNot Required
Typical Results0.22 0.9 0.9 27
Typical Operating Procedures 
PolarityCurrent (Amps)
3.2 mm (1/8 in)