Postalloy® 205
Ideal for use on manganese steel. Under severe impact, such as hammering or pounding, deposits quickly become tougher and harder, and will not spall or mushroom. Postalloy® 205 may be used alone, as a combination build-up and hardfacing alloy, or used as a build-up and cushion prior to overlaying with a more abrasion resistant alloy, such as 214 or 218HD.
Postalloy® 205 is an all-position electrode for joining or overlaying for high impact. It operates on either AC or DC Electrode Positive; the arc is smooth and stable with low spatter loss. Slag removal is easy.
Specifications
Product Type
- Flux-coated Electrode
Applications
- Coal crushing segments
- Shovel drive sprockets
- Dipper teeth and lips
- Gear teeth and attaching wear plates
- Crusher pads
Weld Deposit Properties
- Additional:
- Tensile Strength: 125,000 psi
- Yield Strength: 80,000 psi
- Elongation: 34%
- Hardness as deposited: 15-22Rc
- Work hardens in service to: 45-55Rc
- Deposit Thickness: As required
- Machinability: Poor
- Can be flame-cut
- Deposit Thickness:
- As required
- Machinable:
- Poor Machinability
Welding Parameters
Current Type: DC Electrode Positive , AC
| Amps | Diameter |
|---|---|
| 90-130 | 1/8" (3.2mm) |
| 120-150 | 5/32" (4mm) |
| 140-175 | 3/16" (4.8mm) |
Welding Procedure:
Do not preheat manganese steels. Maintain a short to medium arc. Direct the arc on deposited weld metal depositing 3 to 4" at a time (76.2-101.6mm). Interpass temperatures on manganese steel should not exceed 500 °F (260 °C) by skip-welding. Skip welding is advisable on large parts. Peening while hot helps reduce stress. 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 |