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Product Reference View detailed information about Postalloy® Hardfacing Products
POSTALLOY®
2501-SPL
Description

POSTALLOY® 2501-SPL: Conforms to AWS CoCr-C. A high hardness cobalt base hardfacing alloy with outstanding resistance to abrasion, oxidation, erosion and corrosion. Deposits are harder than 2506-SPL and 2512-SPL, and is especially recommended for metal-to-metal wear. Deposits are highly resistant to galling, retain their high hardness at red heat, and recover full hardness after exposure to temperatures as high as 1500°F (816°C). The higher hardness also means a greater tendency to relief check upon cooling.

Specifications
Product Type

Wire: Metal-cored, gas-shielded cobalt base hardfacing alloy


Weld Deposit Properties
Hardness (2 layers)
48-59Rc
Excellent sliding, metal-to-metal wear resistance with unusually good resistance to galling
Excellent heat resistance - deposits recover full hardness after exposure to temperatures as high as 1500°F (816°C)
Deposits are non-machinable


POSTALLOY® 2501-SPL    Welding Parameters
Current: Use DC Reverse Polarity
Short Arc
Amps
Volts
Gas
Stick Out
1/16" (1.6mm)
80-225
16-24
Ar/CO2
1"(25mm)
Spray Arc
Amps
Volts
Gas
Stick Out
1/16" (1.6mm)
220-300
26-31
Ar/Ox
1"(25mm)

Welding Procedure

These wires operate 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
1/16" (1.6mm)
5 lb spool, 25 lb spool