Your Global Resource for Industrial Hardface Technology and Wear Resistant Technologies
Product Reference View detailed information about Postalloy® Hardfacing Products
Enter Search Phrase
Postalloy®
2839-MCO (formerly part 2839-SPL)
Description
POSTALLOY® 2839-MCO is a metal-cored gas-shielded hardfacing wire that is capable of producing single and multiple layer weld deposits comprised of a large volume of extremely hard multi-Carbides surrounded by a Martensitic matrix. Deposits perform well under low and high stress abrasion and show dramatic improvements over traditional Chromium Carbide products. It may be used on carbon, low alloy, and manganese steels. Unlike Chromium Carbide Alloys, 2839-MCO deposits are heat treatable, allowing for tougher weld metal for applications that encounter moderate impact.
Specifications
Product Type
Wire: Metal-cored, Gas-shielded or Open-arc

Weld Deposit Properties
Microstructure  
Multiple Carbides in Martensitic Matrix
Hardness  
58-61Rc
Machineablility  
Poor, Grind Only
Deposit Thickness  
Unlimited with proper procedures
Heat Resistant  
To 1200°F (649˚C)

Applications
Mixer paddles
Dies cutting blades
Sizing screens
Chutes & liners
Concrete pump parts
Klinker rolls
Farm implements
Pipes & elbows
Conveyor screws
Wear pads & plates
Glass recycling

POSTALLOY® 2839-MCO    Welding Parameters
 
Current: DC Reverse Polarity
Diameter Amps Volts Stick Out
.045" (1.1mm)100-225 15-26 3/4"-1"(19-25mm)
1/16" (1.6mm)160-300 20-28 1"-1┬Ż "(25-38mm)

Welding ProcedureWhile Postalloy® 2839-MCO will easily operate with or without a gas cover, you may find applications for which you prefer a shielding gas. A gas cover for example, will help the weld bead flow out. If a gas cover is used Argon/CO2 or 100% CO2 is recommended. This should cause amperages to go up about 10% and the stick-out should be shortened.
Packaging Options
Diameter
Standard Packaging
Special Packaging Available
.045" (1.1mm)
25 lb spool
110 lb drum, 220 lb drum
1/16" (1.6mm)
25 lb spool, 500 lb drum
55 lb coil, 110 lb drum, 220 lb drum