Postalloy® 207
Postalloy® 207 is a high alloy, work-hardening austenitic manganese steel hardfacing electrode. It can be used equally well for joining and build-up/surfacing of carbon, low alloy and manganese steels. Weld deposits made with Postalloy® 207 are a modified chromium-manganese chemistry providing an excellent combination of weld metal strength and ductility. Work-hardens rapidly under repeated impact. The yield strength is higher than ordinary manganese alloys providing greater resistance to mushrooming when subjected to compressive loads and repeated impact. Ideal as a cushioning or buffer layer on manganese steel parts that must be rebuilt on a repetitive basis. Since it will not embrittle until 1000 °F (538 °C), it will act as an insulator to the manganese base metal in helping it keep below 500 °F (260 °C) during the welding operation.
Specifications
Product Type
- Flux-coated Electrode
- Work-hardening Austenitic Manganese Steel Hardfacing Electrode
Applications
- Fabricating manganese steels
- Manganese to mild or low alloy steels
- Sizing screens
- Grizzly bars
- Steel mill wobblers
Weld Deposit Properties
- Tensile Strength:
- 130,000 psi
- Yield Strength:
- 95,000 psa
- Elongation:
- 35%
- Machinable:
- Poor machinability
- Hardness:
- 45Rc - 55Rc
Welding Parameters
Current Type: DC Electrode Positive , AC
| Amps | Diameter |
|---|---|
| 90-135 | 1/8" (3.2mm) |
| 125-160 | 5/32" (4mm) |
| 150-225 | 3/16" (4.8mm) |
Welding Procedure:
Clean weld area. 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 shape the deposit and 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 |