Postalloy® 515 Flux-coated Electrode

Postalloy® 515 is a high nickel alloy with specially formulated coating produces a smooth arc for low temperature welding of cast iron. It is excellent for "cold welding" in all positions. Weld deposits are highly machinable. Conforms to AWS 5.15.90 ENi-CI.


Product Type

  • Flux-coated Electrode
  • High Nickel Alloy Electrode


  • Cold or low temperature welding applications

Weld Deposit Properties

Tensile Strength:
55,000 psi
- 170 BHN

Welding Parameters

Current Type: DC Electrode Positive , AC

Amps Diameter
40-70 3/32" (2.4mm)
65-110 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® 515, 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. Cover with asbestos or lime 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