Postalloy® RW RailWeld-FCO

Postalloy® RW RailWeld-FCO is a open-arc wire for welding of carbon and alloy steels. Provides good fusion to the side walls without excessive slag interference. Applications include rails for rolling stock and crane rails in dockyards, mines, steelworks, and petrochemical plants.


Product Type

  • Wire
  • Flux-cored
  • Open-arc


  • Rails for rolling stock
  • Crane rails in dockyards, mines, steelworks and petrochemical plants

Weld Deposit Properties

Deposit Thickness:
1 to 2 layers

Welding Parameters

Current Type: DC Electrode Positive

Volts Amps Diameter Stick Out
24-29 220-290 5/64" (2.0mm) 1"-1½"(25-38mm)

Welding Procedure:

Preheat typically 392°F (200°C) for 0.50% C rail steel, increasing to 572°F (300°C) for 0.70% C rail steel. It is important to maintain these minimum temperatures during welding. Maximum suggested interpass temperature 752°F (400°C).

Packaging Options

Diameter Standard Packaging
5/64" (2.0mm) 25 lb (11.3kg) spool