OK Flux 350
OK Flux 350 is an active bonded flux for making butt and fillet welds in carbon steel plate up to 1" (25 mm) thick. It produces a smooth weld surface with uniform edges. The slag is generally free peeling. Its performance is very good even when the plate surface is covered with rust and mill scale. OK Flux 350 is suitable for use with AC or DC power in single or multiwire applications. It is recommended for butt welding of thin wall pressure vessels, rail cars, and structural steel plate. It is used for fillet welding in shipbuilding, pressure vessel, and structural applications. OK Flux 350 also is widely used as a backing flux in one sided welding. It provides good performance at currents up to 1100 amps.
Industries
- Pressure Vessels
- Railcars
- Ship/Barge Building
- Tank and Vessel Fabrication
Welding Process
- SAW - Submerged Arc Welding
Classifications
| Classifications |
ASME SFA 5.17 : AWS A5.17 : F7A2-EM12K AWS A5.17 : F7A2-EM13K AWS A5.17 : F7A2-EL12 |
Approvals
| Grade | CSA W48 F49A3-EM12K-H8 |
| Society | CWB |
| Approvals are based on factory location. Please contact ESAB for more information. |
Classifications
| Wire | AWS/EN | AWS - As Welded |
| Spoolarc 81 | AWS A5.17: EM12K | F7A2-EM12K |
| Spoolarc 29S | AWS A5.17: EM13K | F7A2-EM13K |
Typical Mechanical Properties
| Combined with Wire | Condition | Yield Strength | Tensile Strength | Charpy V-Notch | Elongation |
| Spoolarc 29S | As Welded null | 490 MPa (71 ksi) |
600 MPa (87 ksi) |
32 J, (24 ft-lb) |
28 % |
| Spoolarc 81 | As Welded null | 455 MPa (66 ksi) |
550 MPa (80 ksi) |
42 J, (31 ft-lb) |
26 % |
Typical Weld Metal Analysis %
| Typical Weld Metal Analysis % | ||||||||||||||
| C | Mn | P | S | Si | ||||||||||
| Spoolarc 29S | ||||||||||||||
| 0.04 % | 1.90 % | 0.02 % | 0.02 % | 0.90 % | ||||||||||
| Spoolarc 81 | ||||||||||||||
| 0.04 % | 1.80 % | 0.02 % | 0.01 % | 0.70 % | ||||||||||
Part Numbers and Accessories
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