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Postalloy®
2898-MCG (formerly part 2898-SPL)
Description

Abrasion resistant Postalloy®2898-MCG is a general purpose self-hardening overlay with a good combination of resistance to abrasion and impact. POSTALLOY® 2898-MCG is very tough with excellent resistance to chipping and spalling. Deposits will retain their hardness and maintain a good cutting edge up to 1100°F (593°C). For maximum impact resistance and to avoid cracking in multi-layer deposits, a preheat of 550°F (288°C) is recommended. Use to overlay carbon, low alloy steel and manganese steel.

Specifications
Product Type

Wire: Metal-cored, gas-shielded
Deposits are slag-free.
Gases: Ar/CO, Ar/Ox.
Also available as a flux-cored, open-arc wire - POSTALLOY® 2898-FCO

Electrode equivalent: POSTALLOY® 21


Weld Deposit Properties
Average Hardness  
55-59Rc
Good Hot-hardness  
Up to 1100┬░ F (593┬░C)
Maximum overlay  
Unlimited layers with proper procedures, including preheat and interpass temperature
Non-Machinable  
Must be ground

Applications

Hot Shear Blades
Dozer Blades
Shearing and piercing dies
Tamper feet

Bucket Teeth
Farm Implements Augers


POSTALLOY® 2898-MCG    Welding Parameters
 
Current: DC Reverse Polarity
Short Arc Amps Volts Stick Out
.035" (0.9mm)70-19015-211/2"(12mm)
.045" (1.1mm) 90-12015-21 1/2"(12mm)
1/16" (1.6mm)150-220 18-213/4"(19mm)
Spray Arc Amps Volts Stick Out
.035" (0.9mm)230-30020-271/2"(12mm)
.045" (1.1mm) 250-325 27-30 5/8"(15mm)
1/16" (1.6mm)300-37527-303/4"(19mm)
Packaging Options
Diameter
Standard Packaging
Special Packaging Available
.035" (0.9mm)
25 lb spool
.045" (1.1mm)
25 lb spool
50 lb spool, 110 lb drum, 220 lb drum
1/16" (1.6mm)
25 lb spool
50 lb spool, 55 lb coil, 110 lb drum, 220 lb drum