Postalloy® 505 Flux-coated Electrode

Postalloy® 505 is a non-cracking cast iron electrode for welding and joining various types of cast iron and for welding cast iron to steel. Good for heavy sections. Conforms to AWS 5.15.90 Eni Fe-CI.


Product Type

  • Flux-coated Electrode
  • Cast Iron Electrode


  • Use on dirty oil soaked cast iron machinable crack free deposits

Weld Deposit Properties

Tensile Strength:
60,000 psi
- 210 BHN

Welding Parameters

Current Type: DC Electrode Positive , AC

Amps Diameter
40-70 3/32" (2.4mm)
65-100 1/8" (3.2mm)
110-140 5/32" (4mm)

Welding Procedure:

Vee out cracks and defective weld metal using Postalloy® 250 gouging electrode. When using Postalloy® 505, use a short arc length and keep arc directed on deposited metal. Keep the electrode tilted slightly in the direction of travel. It is recommended that a 3/32 (2.4mm) electrode be used for the initial root pass. Use stringer beads only - do not weave. Weld beads should be 1" - 3" long (25mm-76.2mm), craters to be filled by back whipping, and each pass should be peened immediately upon breaking arc. Remove slag by chipping and brushing. Allow part too cool slowly with a thermal blanker or sand if possible.

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