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
  • Build-up 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