Postalloy® 27
Postalloy® 27 is a non-cracking build-up electrode in the machinable range of hardness providing wear resistance that is far superior to low and medium carbon steel and low alloy steels. Deposits are extremely tough and have a high resistance to impact and deformation and are not subject to spalling or roll-over. In addition, deposits are dense, crack-free and porosity-free.
Specifications
Product Type
- Flux-coated Electrode
Applications
- Rebuilding badly worn machine parts back to original dimensions
- Roll ends
- Shafts
- Buildup of parts prior to overlaying with a more wear resistant overlay
- Brake drums
- Wheels
- Tractor rolls
- Rails
- Idlers
- Gear teeth
- Wobblers
- Sprockets
- Dredge pump casing
- Trunnions
Weld Deposit Properties
- Additional:
- Alternative Wire: DuraBuild™ 2892-FCO or 2892-MCG
- Hardness:
- Up to 31Rc
- Excellent impact resistance
- High compressive strength
- Fair abrasion resistance
- Can be flame-cut
- Deposit Thickness:
- As required
Welding Parameters
Current Type: DC Electrode Positive , AC
| Amps | Diameter |
|---|---|
| 90-120 | 1/8" (3.2mm) |
| 120-150 | 5/32" (4mm) |
| 160-180 | 3/16" (4.8mm) |
Welding Procedure:
Clean weld area. Use of Postalloy® 250 is recommended to remove fatigued or damaged metal. Preheat heavy sections to about 250 °F (121 °C). Use stringer or weaving technique holding a short to medium arc. Long deposits may be made without danger of cracking. Do not allow excessive heat buildup. Chip slag between passes. Allow part to cool slowly.
Packaging Options
| Diameter | Standard Packaging |
|---|---|
| 1/8" (3.2mm) | Resealable Plastic Box |
| 5/32" (4mm) | Resealable Plastic Box |
| 3/16" (4.8mm) | Resealable Plastic Box |