ESAB

OK Flux 231

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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.

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Industries

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

Welding Process

  • SAW - Submerged Arc Welding

Classifications

Classifications ASME SFA 5.17 :
AWS A5.17 : F7A2-EM12K
AWS A5.17 : F7A2-EL12

Approvals

Grade CSA W48 E49A3-EM12K-H8
Society CWB
Approvals are based on factory location. Please contact ESAB for more information.

Classifications

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

Typical Mechanical Properties

Charpy V-Notch 28 ft-lb
Charpy V-Notch 38 J
Condition 1
Elongation 27 %
Tensile Strength 81 ksi
Tensile Strength 560 MPa
Combined with Wire Spoolarc 81
Yield Strength 67 ksi
Yield Strength 460 MPa

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Mn P S Si
Spoolarc 81
0.08 % 1.40 % 0.02 % 0.01 % 0.30 %
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Part Numbers : OK Flux 231
8334F09 Find a distributor

ESAB EQUIPMENT WARRANTIES ARE VALID ONLY WHEN PURCHASED THROUGH AN ESAB AUTHORIZED DEALERSHIP.

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