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POSTALLOY® 303-SPL is a solid, gas-shielded wire designed for high strength welding of low carbon and low alloy steels. It utilizes a high degree of deoxidizers which purge the weld pool of impurities resulting in a weld deposit that is dense, porosity-free and "X-RAY" quality.

Recommended for single and multi-pass welding, and applications requiring deep penetration such as pipe or deep fillet welds. It is ideal for lightly rusted or thinly scaled surfaces and is especially good for applications that require machining after welding. 
Product Type

Wire: Solid Wire, Gas-shielded

For spray transfer use 98% Argon / 2% Oxygen, 35 - 45 cfh

Weld Deposit Properties
Tensile Strength  
80,000 psi
Weld deposits can be flame-cut.  


Low and medium carbon steels
Low alloy steels
Free-machining sulfur or phosphorus bearing steels

POSTALLOY® 303-SPL    Welding Parameters
Current: Current:
Short Arc Amps Volts Gas Stick Out
.035" (0.9mm)60-22515-24Ar/CO2 75/253/8"-1/2" (9-12mm)
.045" (1.1mm) 100-32517-34Ar/CO2 75/251/2"-3/4" (12-19mm)
Packaging Options
Standard Packaging
.035" (0.9mm)
33 lb spool
.045" (1.1mm)
33 lb spool