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Tubular Electrodes Product Reference View detailed information about Postalloy® Hardfacing Products
POSTALLOY®
225HD
Description
POSTALLOY® 225HD is a Chromium Carbide tubular hardfacing electrode, modified with additions of two alloys to improve wear. The micro structure has very fine carbides which give improved wear, erosion and impact resistance over traditional Chromium Carbides .  It is designed for applications that require more abrasion resistance than other Chromium Carbides. 
   • Easy out-of-position weldability with the 1/4" diameter
   • Excellent DC operation.
   • High metal recovery - no slag to chip. POSTALLOY® 225HD is over 90% efficient.
   • Low amperage
   • High deposition rates - up to 3 times faster than ordinary electrode
   • Moisture resistant

Specifications
Product Type
Flux-coated Tubular Electrode

Weld Deposit Properties
Average Hardness
60-62Rc
Maximum Deposit Thickness
2 layers
Weld deposits will relief check-crack readily
Heat Resistant to
Excellent up to 1100°F (593°C)

Applications
Mining and quarry equipment
Dredge bucket lips and teeth
Scraper and grader blades
Crusher mantles and liners
Screw conveyors
Palm oil crusher rolls
Excellent final layer on manganese jaw crushers and swing hammers
The 1/4" size is ideal for vertical, edge and stringer beads



POSTALLOY® 225HD    Welding Parameters
Current: AC or DC Reverse Polarity
Diameter
Amps
1/4" (6.0mm)
70-130

Welding Procedure
Remove old hardfacing and any fatigued metal if weld spalling or cracking is a problem. Many steels can be hardfaced without special preheats, if the welding alloy used has relief checking. A low preheat of 150˚F (66˚C) may sometimes aid in weldability. Do not preheat austenitic manganese steels. The interpass temperature of austenitic manganese and most steels should be less than 500˚F (260˚C). Electrode angles should be slightly less than 90˚. Do not apply more than two layers. A short arc length and stringer beads are recommended to reduce weld dilution.


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