Postalloy®52 Flux-coated Electrode

For welding highly contaminated, oil-soaked or badly oxidized cast iron. Deposits are non-machinable. POSTALLOY 52 was developed primarily as a sealing and buttering electrode on cast iron. The emulsifying agents in the coating penetrate through the oxidized, contaminated surface producing a solid bond between weld and parent metal. This exceptionally solid and dense iron-base layer is the perfect foundation for finishing with electrodes such as POSTALLOY 50 or 51.


Product Type

  • Flux-coated Electrode


Weld Deposit Properties

Tensile strength:
60,000 psi

Welding Parameters

Current Type: AC , DC Electrode Positive

Amps Diameter
65-100 1/8" (3.1mm)
110-140 5/32" (4.0mm)

Welding Procedure:

Vee out cracks and defective weld metal using Postalloy® 250 gouging electrode. When using Postalloy® 52, 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 (2.5mm) electrode be used for the initial root pass. Use stringer beads only - do not weave. Weld beads should be 1" to 3" long (25mm to 75mm), 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
All Resealable Plastic Box