Postalloy® 2839-MCO

Postalloy® 2839-MCO is a metal-cored gas-shielded hardfacing wire that is capable of producing single and multiple layer weld deposits comprised of a large volume of extremely hard multi-Carbides surrounded by a Martensitic matrix. Deposits perform well under low and high stress abrasion and show dramatic improvements over traditional Chromium Carbide products. It may be used on carbon, low alloy, and manganese steels. Unlike Chromium Carbide Alloys, 2839-MCO deposits are heat treatable, allowing for tougher weld metal for applications that encounter moderate impact.

Specifications

Product Type

  • Wire
  • Metal-cored
  • Gas-shielded
  • Open-arc

Applications

  • Mixer paddles
  • Die cutting blades
  • Sizing screens
  • Chutes and liners
  • Concrete pump parts
  • Klinker rolls
  • Farm implements
  • Pipes and elbows
  • Conveyor screws
  • Glass recycling
  • Wear pads and plates

Weld Deposit Properties

Additional:
Deposit Thickness:
Unlimited with proper procedures
Heat Resistance:
To 1200°F (649˚C)
Machinable:
Poor, grind only
Hardness:
58Rc - 61Rc

Welding Parameters

Current Type : DC Electrode Positive

Volts Amps Diameter Stick Out
15-26 100-225 .045" (1.1mm) 3/4"-1"(19-25mm)
20-28 160-300 1/16" (1.6mm) 1"-1½ "(25-38mm)

Welding Procedure:

While Postalloy® 2839-MCO will easily operate with or without a gas cover, you may find applications for which you prefer a shielding gas. A gas cover for example, will help the weld bead flow out. If a gas cover is used Argon/CO2 or 100% CO2 is recommended. This should cause amperages to go up about 10% and the stick-out should be shortened.

Packaging Options

Diameter Standard Packaging Standard Packaging Available
.045" (1.1mm) 25 lb (11.3kg) spool 220 lb (99.80kg) drum
1/16" (1.6mm) 25 lb (11.3kg) spool 220 lb (99.80kg) drum