Postalloy® 2506-MCG
Postalloy® 2506-MCG conforms to AWS A5.21:2011 Class ERCCoCr-A. Cobalt base hardfacing alloy with chromium carbides providing excellent resistance to metal to metal wear and corrosion over a wide temperature range. Offers outstanding self-mating, anti-galling properties and it is effective when abrasion is accompanied by thermal shock or impact. Deposits are machinable. Crack-free deposits can be made with proper preheat, post heat and inter-pass temperature.
Specifications
Product Type
- Metal-cored
- Gas-shielded
- Cobalt Base Hardfacing Alloy
Applications
- Shear blades, Fluid flow valves, Extrusion screws, Roll bushings, and Valve bearing surface.
Weld Deposit Properties
- Additional:
- Crack-free deposits with proper preheat (take off)
- Deposit Thickness:
- 2 layers maximum
- Machinable:
- Yes
- Hardness:
- 35Rc - 48Rc
Welding Parameters
Current Type: DC Electrode Positive
| 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 | 1" (25mm) |
| Volts | Amps | Spray Arc | Gas | Stick Out |
|---|---|---|---|---|
| 26-31 | 220-300 | .045" (1.2mm) | Ar/Ox | 3/4" (19mm) |
| 26-31 | 80-225 | 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. CO gives the best control, but the most dilution and lowest hardness on first pass. Argon/CO (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 |