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

  • Fabricación de aceros de manganeso
  • Manganeso a aceros de aleación baja o media
  • Cribas
  • Barras de cribas de minería
  • Zarandas vibratorias de molinos de acero

Weld Deposit Properties

Additional:
También disponible como alambre semiautomático: Posta test test
Resistencia a la tracción: 130.000 psi
Límite elástico: 95.000 psi
Elongación: 35%
Dureza promedio del depósito: 20Rc
El trabajo se endurece en servicio de: 45-55Rc Torneabilidad: Baja
Los depósitos no se pueden cortar con llama.
Machinable:
Poor machinability

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