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ESAB

OK FLUX 231

OK FLUX 231

OK Flux 231 is an active, bonded flux designed for fillet and butt welding of carbon steel plate. It provides excellent tolerance of rust and mill scale so joint preparation can be minimized. This flux will produce horizontal fillets up to 3/8" (9.5 mm) leg size without undercut or rollover. The slag peeling is excellent. OK Flux 231 can be used for multipass welding, but because Mn and Si buildup is possible, welding voltage should be kept to a minimum and plate thickness should be limited to 1" (25 mm). OK Flux 231 is suitable for DC single and parallel wire welding at currents up to 1000 A. It is used for welding rail cars, water heater tanks, ship plates, and structural steel.


Industries

  • Railcars
  • Ship/Barge Building
  • Structural Steel Fabrication
  • Tank and Vessel Fabrication

Welding Process

  • Welding-SAW - Submerged Arc Welding

Specifications


Classifications: ASME SFA 5.17, AWS A5.17, F7A2-EM12K, AWS A5.17, F7A2-EL12
Approvals: CWB, CSA W48 E49A3-EM12K-H4

Approvals are based on factory location. Please contact ESAB for more information.


Typical Weld Metal Analysis %

PSSiCMn
0.02 %0.01 %0.30 %0.08 %1.40 %

Typical Mechanical Properties

Charpy V-Notch Condition Elongation Tensile Strength Wire Yield Strength
28 ft-lb As Welded 27 % 81 ksi Spoolarc 81 67 ksi

Classifications

AWS - As Welded AWS/EN Wire
F7A2-EM12K AWS A5.17: EM12K Spoolarc 81

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