Postalloy® 306HD Flux-coated Electrode

Postalloy® 306HD, for welding construction grades of carbon and low allow steels, offers excellent weldability on either AC or DC Electrode Positive, in any position. Weld deposits are dense, porosity-free and “X-Ray” quality. The low hydrogen moisture resistant coating helps to prevent underbead cracking and delayed brittle fracture. Furthermore, the coating is non-conductive, to eliminate side-arcing.


Product Type

  • Flux-coated Electrode


  • Low, medium and high carbon steels
  • Crack sensitive steels
  • Tramp Steels
  • Free machining steelsHigh strength, low alloy steels such as Cor-Ten , T-1, HY-80 and Jalloy
  • Ideal for single and multi-pass welding applications
  • It is especially good for applications that require machining after welding

Weld Deposit Properties

Tensile Strength:
84,000 psi

Welding Parameters

Current Type: DC Electrode Positive , AC

Amps Diameter
70-100 3/32" (2.4mm)
110-150 1/8" (3.2mm)
140-190 5/32" (4mm)

Welding Procedure:

Packaging Options

Diameter Standard Packaging
3/32" (2.4mm) Resealable Plastic Box
1/8" (3.2mm) Resealable Plastic Box
5/32" (4mm) Resealable Plastic Box