Postalloy® 217HD is modified Chromium Carbide tubular hardfacing electrode, alloyed with Niobium and a small addition of Molybdenum. The microstructure has very fine carbides which give improved wear, errosion and impact resistance over traditional Chromium Carbides. It is designed for applications that require more abrasion resistance than Postalloy® 215HD. The Carbide concentration is denser and slightly harder but less brittle than Postalloy® 215HD providing a better, more wear-resistant surface.
• Easy out-of-position weldability with the 1/4" diameter
• Excellent DC operation.
• High metal recovery - no slag to chip. Postalloy® 217HD is over 90% efficient.
• Low amperage
• High deposition rates - up to 3 times faster than ordinary electrode
• Moisture resistant
Flux-coated Tubular Electrode
Mining and quarry equipment
Dredge bucket lips and teeth
Scraper and grader blades
Crusher mantles and liners
Screw conveyors
Construction equipment
Excellent final layer on manganese jaw crushers and swing hammers
The 1/4" size is ideal for vertical, edge and stringer beads
The 3/8" size is ideal for covering large areas and button hardfacing
| Diameter | Amps |
|---|---|
| 1/4" (6.0mm) | 80-120 |
| 3/8" (9mm) | 140-190 |
| 1/2" (12mm) | 180-220 |
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.