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Postalloy® 2501-E: 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.

Product Type

Electrode: Cobalt base hardfacing alloy

Weld Deposit Properties
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)  
Hardness (2 layers)  
Deposits are non-machinable  


Pump sleeves, Rotary seal rings, Wear pads, Expeller screws and Bearing sleeves.

Postalloy® 2501-E    Welding Parameters
Current: DC Electrode Positive
Diameter Amps Volts
3/32" (2.4mm)50-7015-25
1/8" (3.1mm)80-11015-25
5/32" (4.0mm)120-15015-25
3/16" (4.8mm)150-18015-30
Packaging Options
Standard Packaging
All Diameters
10 lb tubes