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Tungsten Carbide Hardfacing Product Reference View detailed information about Postalloy® Hardfacing Products
POSTALLOY®
219HD
Description
When protection with tungsten carbide is needed, POSTALLOY® 219HD is an ideal choice. Weld deposits contain tungsten carbide in a chromium rich matrix for added wear and corrosion protection . Other features include:
   • Easy out-of-position weldability with the 1/4" diameter
   • Excellent AC or DC operation, even on a "buzz box"
   • Low amperage and high metal recovery - no slag to chip
   • High deposition rates - up to 3 times faster than ordinary electrodes
   • Moisture resistant coating, even under severe weather or high humidity
POSTALLOY® 219HD hardfacing is a unique concept in hard facing technology and is over 90% efficient. It's tubular design offers very smooth operational characteristics and permits higher travel speeds and much higher percentages of carbide forming elements contained in the core as compared to ordinary flux-coated electrodes.
Specifications
Product Type
Flux-coated Tubular Electrode alloyed with Tungsten Carbide and Chromium

Weld Deposit Properties
Hardness
64-68Rc
Deposit thickness
2 layers
Relief checks readily to prevent stress build-up.
Cannot be flame-cut.

Applications
Auger points
Debarking hammers
Cutter and dredge teeth
Tamping tools
Bucket pin ends
Shredder and anvil knives
Muller plows
Mixer paddles and fan blades
Dredge teeth

POSTALLOY® 219HD    Welding Parameters
Current: AC or DC Reverse Polarity
Diameter
Amps
1/4" (6.0mm)
80-130
3/8" (9.5mm)
130-180
1/2" (12.7mm)
180-220

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°C) is recommended for steels with a carbon content of .25 to .45. Steels with a higher carbon level should be preheated from 400-700°F (204-371°C). Do not preheat austenitic manganese steel. Use a minimum arc length equal to about the diameter of the electrode. Hold the electrode at 90° to the work surface for 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" (6.0mm)
Resealable Plastic Box
3/8" (9.5mm)
Resealable Plastic Box
1/2" (12.7mm)
Resealable Plastic Box