Postalloy® 303-SPL

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

  • Solid Wire
  • Gas-shielded


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

Weld Deposit Properties

Tensile strength:
80,000 psi
Weld deposits can be flame-cut
For spray transfer use 98% Argon / 2% Oxygen, 35 - 45 cfh

Welding Parameters

Current Type:

Volts Amps Short Arc Gas Stick Out
15-24 60-225 .035" (0.9mm) Ar/CO2 75/25 3/8"-1/2" (10-12.7mm)
17-34 100-325 .045" (1.2mm) Ar/CO2 75/25 1/2"-3/4" (12.7-19mm)

Welding Procedure:

Packaging Options

Diameter Standard Packaging
.035" (0.9mm) 33 lb (15kgs) spool
.045" (1.1mm) 33 lb (15kgs) spool