Postalloy® 207 Flux-coated Electrode

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.


Product Type

  • Flux-coated Electrode
  • Work-hardening Austenitic Manganese Steel Hardfacing Electrode


  • 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
Poor machinability
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