Postalloy® 301-SPL

Postalloy® 301-SPL is a high strength, ductile, crack resistant welding alloy specifically designed for welding problem steels such as, low alloy, high carbon or crack sensitive tool steels. Ideal for welding dissimilar steels- low alloy, spring steels, carbon steels, tool steels. The benefits of Postalloy® 301-SPL include the following:

  • Excellent joining characteristics - With the combination of balanced alloy chemistry and high strength, crack resistant weld deposits, the capability to weld dissimilar problem steels is outstanding.
  • Carbon has no adverse effects - Carbon, the cause of most problems associated with weld cracking and hard spots, is rendered harmless.
  • Acts as a shock absorber during operation - Since Postalloy® 301-SPL does not respond to heat-treatment and remains ductile, it has the ability to withstand heavy impact or shock loading.


Product Type

  • Solid Wire
  • Gas-shielded


  • Shafts and keyways
  • Gear tooth buildup
  • Stamping and forging dies
  • Shovel teeth and blades
  • Wear plates
  • Grousers
  • Heat-treating parts
  • Cracked steel casings
  • Jigs and fixtures
  • Chain links

Weld Deposit Properties

Electrode equivalent: Postalloy® 30
Tensile strength:
120,000 psi
Deposits cannot be flame-cut
Machinable with carbide tools

Welding Parameters

Current Type: DC Electrode Positive

Volts Amps Diameter Stick Out
16-27 75-300 .045" (1.2mm) 1/2"-5/8" (12.7-15.8mm)

Welding Procedure:

Postalloy® 301-SPL can be used in short-arc with Argon/CO(75/25) or in spray-transfer with 2 Argon/Oxygen(98/2). Recommended gas flow is 40-50 cfh. Use short-arc welding for thinner materials, root passes and welding out-of-position. Use spray transfer for welding in the flat position.

Packaging Options