BOR-A (R) is a hardfacing electrode operating on AC / DC(-) depositing an air hardening weld metal . The deposit displays excellent toughness and ability to withstand heavy impact loads and has excellent resistance to rolling and sliding friction. The weld deposit is machinable. Ideal for rail points and crossings, axles, wheels, gear shafts, couplings, pinion teeth, rollers, sprockets, etc.
1. Use short arc.
2. Use low current.
3. Ensure the electrodes are dry. Re-dry the electrodes at 150°C for one hour.
4. If the base material has the carbon content of more than 0.25% a buffer layer using a low hydrogen electrode is recommended.
WELD METAL HARDNESS : 250-280 BHN
|Current Range (Amps)||190-220||140-180||100-130||65-90|