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Postalloy® 
27
Description
Postalloy® 27 is a non-cracking build-up electrode in the machinable range of hardness providing wear resistance that is far superior to low and medium carbon steel and low alloy steels. Deposits are extremely tough and have a high resistance to impact and deformation and are not subject to spalling or roll-over. In addition, deposits are dense, crack-free and porosity-free.
Specifications
Product Type
Flux-coated electrode
Alternative Wire: Postalloy® 2892-FCO, Postalloy® 2892-SPL

Weld Deposit Properties
Hardness  
up to 31Rc
Deposit Thickness  
As required
Impact Resistance  
Excellent
Compressive Strength  
High
Abrasion Resistance  
Fair
Can be flame-cut  

Applications
Rebuilding badly worn machine parts back to            original dimensions
Roll ends
Shafts
Buildup of parts prior to overlaying with a more          wear resistant overlay
Brake drums
Wheels
Tractor rolls
Rails
Idlers
Gear teeth
Wobblers
Sprockets
Dredge pump casing
Trunnions

Postalloy® 27    Welding Parameters
 
Current: AC/DC Reverse
Diameter Amps
1/8" (3.1mm)90-120
5/32" (4.0mm)120-150
3/16" (4.8mm)160-180

Welding ProcedureClean weld area. Use of Postalloy 250 is recommended to remove fatigued or damaged metal. Preheat heavy sections to about 250┬░F (121┬░C). Use stringer or weaving technique holding a short to medium arc. Long deposits may be made without danger of cracking. Do not allow excessive heat buildup. Chip slag between passes. Allow part to cool slowly.
Packaging Options
Diameter
Standard Packaging
1/8" (3.1mm)
Resealable Plastic Box
5/32" (4.0mm)
Resealable Plastic Box
3/16" (4.8mm)
Resealable Plastic Box