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Postalloy® 
2521-E
Description

Postalloy® 2521-E: Cobalt base hardfacing alloy offering good strength and toughness at elevated temperatures. It resists oxidizing and reducing atmospheres up to 2100°F (1149°C). Postalloy® 2521-MCG also provides excellent resistance to corrosive environments, and outstanding resistance to cavitation and thermal shock. Deposits have very little tendency to relief check and are fully machinable.

Specifications
Product Type

Electrode: Cobalt base hardfacing alloy


Weld Deposit Properties
Excellent resistance to corrosive environments, and outstanding resistance to cavitation and thermal shock  
Resists oxidizing and reducing atmospheres up to 2100┬░F (1149┬░C)  
Deposit thickness  
2 Layers
Hardness (2 layers)  
20-32Rc
Work-hardens up to   
43Rc
Deposits are fully machinable  

Applications

Hot shears, Cavitation repair, chemical and petrochemical valves,Forging dies, Steam valves and Seamless pipe piercing mandrels.


Postalloy® 2521-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
Diameter
Standard Packaging
All Diameters
10 lb tubes