Postalloy® 2812-MCG

Nickel matrix harface overlay - 40Rc. Weld deposits of Postalloy®2812-MCG consist of chromium borides in a nickel matrix for excellent resistance to low stress abrasion and metal-to-metal wear. The high nickel and chromium content gives this weld deposit good oxidation and corrosion resistance. This alloy is a metal-cored, gas-shielded wire designed for application by GMAW. Deposits are smooth with no slag to chip and no ripples. May be applied to cast iron, carbon and alloy steels, stainless steel, and nickel alloys. Excellent sliding, metal-to-metal wear resistance with unusually good resistance to galling. Very good resistance to atmospheric, steam and salt water corrosion Excellent heat resistance - deposits maintain their hot-hardness up to 1000 °F (538 °C). Deposits are non-sparking, non-heat treatable, and non-magnetic.

Specifications

Product Type

  • Wire
  • Metal-cored
  • Gas-shielded

Applications

  • Shafts sleeves
  • Pump parts
  • Impellers
  • Bushings
  • Gauges
  • Guides cams
  • Rocker arms

Weld Deposit Properties

Heat Resistance:
Excellent
Machinable:
Fully machinable
Hardness:
- 40Rc

Welding Parameters

Current Type : DC Electrode Positive

Volts Amps Short Arc Gas Stick Out
16-23 80-200 .045" (1.2mm) Ar/CO2 1/2" (12.7mm)
18-23 150-220 1/16" (1.6mm) Ar/CO2 3/4"(19mm)
Volts Amps Spray Arc Gas Stick Out
29-33 220-250 .045" (1.2mm) Ar/Ox 1/2" (12.7mm)
30-35 240-300 1/16" (1.6mm) Ar/Ox 3/4"(19mm)

Welding Procedure:

Packaging Options

Diameter Standard Packaging
.045" (1.2mm) 5 lb (2.27kgs) spool, 25 lb (11.30kgs) spool
1/16" (1.6mm) 25 lb (11.30kgs) spool