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
- Ship/Barge Building
- Tank and Vessel Fabrication
- Railcars
Welding Process
- SAW - Submerged Arc Welding
Classifications
| AWS - As Welded | AWS/EN | Wire |
| F7A2-EM13K | AWS A5.17: EM13K | Spoolarc 29S |
| F7A2-EM12K | AWS A5.17: EM12K | Spoolarc 81 |
Typical Mechanical Properties
| Charpy V-Notch | Condition | Elongation | Tensile Strength | Wire | Yield Strength |
| 24 ft-lb | As Welded | 28 % | 87 ksi | Spoolarc 29S | 71 ksi |
| 31 ft-lb | As Welded | 26 % | 80 ksi | Spoolarc 81 | 66 ksi |
Typical Weld Metal Analysis %
| weld metal analysis | ||||
| P | Mn | C | S | Si |
| 0.02 % | 1.80 % | 0.04 % | 0.01 % | 0.70 % |
| Approvals: | CWB; CSA W48 F49A3-EM12K-H8 |
| Classifications: | ASME SFA 5.17; AWS A5.17; F7A2-EM12K; AWS A5.17; F7A2-EL12; AWS A5.17; F7A2-EM13K |
Approvals are based on factory location. Please contact ESAB for more information.