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Postalloy® 
CF-27
Postalloy® CF-27 is a high hardness, chromium-free metal-cored hardfacing overlay designed for high abrasion applications with minimal impact. The unique wear properties are derived from a network of Boron, Niobium, Vanadium and Molybdenum Carbides in a hard carbon/iron matrix. Abrasive wear properties are superior to traditional chromium carbide alloys of similar hardness - 60 to 65Rc. This alloy has excellent weldability without exposing the welder to harmful hexavalent chromium fumes with a very smooth bead with no slag to remove. Deposit efficiency over 90%. CF27 may be used with any common shielding gas or open-arc.

Caution - Even though most of the welding fume comes from the electrode/filler wire, some of the fume does come from the base metal being welded. Therefore, the base material should be checked for chromium content...
Specifications
Product Type
Wire: Metal-cored
Gas shielding,100% CO, 75/25 or 98/2
Also operates Open Arc

Weld Deposit Properties
Matrix Hardness  
65Rc
Maximum Thickness  
2 Layers
Deposits are non-machinable  
Deposits will check-crack to relieve stress  

Applications
Shovel teeth
Wear parts
Screw conveyors
Longwall miners
Cutter drums
Subsoiler teeth
Dozer blades
Clamshell buckets

Postalloy® CF-27    Welding Parameters
 
Current: DC Electrode Positive
Diameter Amps Volts Stick Out
.045" (1.1mm)18-22100-2001/2"(12mm)
1/16" (1.6mm)20-25150-2503/4"(19mm)
Packaging Options
Diameter
Standard Packaging
.045" (1.1mm)
25 lb spool
1/16" (1.6mm)
25 lb spool