OP 181 is an agglomerated rutile-aluminate type flux for welding unalloyed structural steels as well as fine-grain structural steels with a yield strength of up to 355 MPa. High silicon and manganese pick-up is obtained with this flux. It is therefore particularly suited for applications in combination with wire electrodes OE-S1 and OE-S2. OP 181 is used for high-speed welding with the SA twin-wire process, as well as for tandem and multi-wire welding of large pipes or spiral pipes in thin materials. The good slag detachability makes OP 181 particularly suitable for fillet welding applications and pipe-web-pipe joints (e.g. finned tubes). OP 181 can be welded with DC or AC at up to 1000 A.
- Recommended for limited amount of passes applications
- For high speed welding fillet welds
- High Mn and Si pick-up from the flux