Postalloy® 220HD Tubular Electrode


Postalloy® 220HD contains increased levels of tungsten carbide compared to Postalloy® 219HD, with additional chrome and cobalt for toughness. The unique blend of tungsten carbide and chrome provides a high polish in service to reduce the coefficient of friction. When protection against severe abrasion is needed, Postalloy® 220HD is an ideal choice.

  • Low amperage and high metal recovery - no slag to chip. Postalloy® 220HD is over 90% efficient.
  • High deposition rates - up to 3 times faster than ordinary electrodes
  • Moisture resistant coating, even under severe weather or high humidity

Please visit our dedicated Tungsten Carbide Hardfacing website here for more information.


Product Type

  • Flux-coated Tubular Electrode alloyed with Tungsten Carbide, Cobalt and Chrome


  • Conveyor screws and augers
  • Cutter and dredge teeth
  • Mixer paddles and blades
  • Shredder and anvil knives
  • Bucket pin ends
  • Coal and cement fans
  • Tamping tools

Weld Deposit Properties

Tungsten carbide hardness:
Relief checks readily to prevent stress build-up
Deposit Thickness:
2 layers
64Rc - 68Rc

Welding Parameters

Current Type: DC Electrode Positive , AC

Amps Diameter
80-130 1/4" (6.4mm)
140-190 3/8" (10mm)
180-220 1/2" (12.7mm)

Welding Procedure:

Remove old hardfacing and any fatigued base metal. Postalloy® 250 gouging electrode is useful for this purpose. Preheat from 200-400 °F (93-204 ºC) is recommended for steels with a carbon content of .25 to .45. Steels with a higher carbon level should be preheated from 400-700 ºF (204-371 ºC). Do not preheat austenitic manganese steels. Use a minimum arc length equal to about the diameter of the electrode. Hold the electrode at 90º to the work surface for a proper application. Do not apply more than two layers. On manganese or hardened steel, an intermediate or cushion layer of Postalloy® 207 is recommended.

Packaging Options

Diameter Standard Packaging
1/4" (6.4mm) Resealable Plastic Box
3/8" (10mm) Resealable Plastic Box
1/2" (12.7mm) Resealable Plastic Box