Postalloy® 2512-MCG

Postalloy® 2512-MCG conforms to AWS CoCr-B. Slightly harder and more wear resistant than 2506-MCG, due to increasing level of hard chromium carbides, but its impact resistance is somewhat lower and is also tougher to machine. Higher tungsten content improves the hot hardness properties at higher temperatures. Weld deposits also have a greater tendency to relief check if welding procedures are not closely monitored.

Specifications

Product Type

  • Metal-cored
  • Gas-shielded
  • Cobalt Base Hardfacing Alloy

Applications

  • Saw teeth
  • Extrusion dies
  • Chainsaw bars

Weld Deposit Properties

Room Temperature Hardness:
45-50Rc
Hardness at 1500 °F (816 °C):
35Rc
Deposit Thickness:
2 maximum
Machinable:
Yes

Welding Parameters

Current Type :

Volts Amps Short Arc Gas Stick Out
16-24 80-225 .045" (1.2mm) Ar/CO2 3/4" (19mm)
16-24 80-225 1/16" (1.6mm) Ar/CO2 3/4" (19mm)
Volts Amps Spray Arc Gas Stick Out
26-31 220-300 .045" (1.2mm) Ar/Ox 3/4" (19mm)
26-31 220-300 1/16" (1.6mm) Ar/Ox 3/4" (19mm)

Welding Procedure:

This wire operates over a wide range of settings and can be used in short-arc and spray transfer. For short-arc welding, use 16-24 volts, 80-225 amps. CO2 gives the best control, but the most dilution and lowest hardness on first pass. Argon/CO2 (75/25) gives good control, a better bead appearance and higher first pass hardness. For spray-arc, use 26-31 volts, 220-300 amps. Argon/Oxygen (98/2) works well. It produces minimal dilution and high first pass hardness. Gas flow rate - 40-45 cfh.

Packaging Options

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