Postalloy® 217HD Tubular Electrode
Postalloy® 217HD is modified chromium carbide (complex carbide) tubular hardfacing electrode, alloyed with niobium and a small addition of molybdenum. The microstructure 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 Postalloy® 215HD. The carbide concentration is denser and slightly harder but less brittle than Postalloy® 215HD providing a better, more wear-resistant surface.
- 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
Specifications
Product Type
- Flux-coated Tubular Electrode
Applications
- Solid waste shredder parts
- Agricultural implements
- Earth moving and construction equipment
- Cement mill parts
- Brick making equipment
- Cereal grinding equipment and muller plows
Weld Deposit Properties
- Additional:
- Weld deposits will relief check-crack readily
- Deposit Thickness:
- 2 layers
- Heat Resistance:
- Excellent up to 1100 °F (593 °C)
- Hardness:
- 50Rc - 60Rc
Welding Parameters
Current Type: DC Electrode Positive , AC
| Amps | Diameter |
|---|---|
| 80-120 | 1/4" (6.4mm) |
| 140-190 | 3/8" (10mm) |
| 180-220 | 1/2" (12.7mm) |
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" (6.4mm) | Resealable Plastic Box |
| 3/8" (10mm) | Resealable Plastic Box |
| 1/2" (12.7mm) | Resealable Plastic Box |