- Ensure that there are good fit-ups between the joints and that the gap does not exceed 3 mm.
- Make sure that the welded joints are clean and dry.
- Plan the welding sequences and select filler materials before welding. (Single or multi-run welding.)
- Preheat the material as per image 1. When welding in a non-controlled environment (high atmospheric humidity), special precautions must be taken.
- The working temperature may not exceed 225°C, as the material is annealed out, which results in poor material properties.
- The working temperature must be measured 75 mm from the centre of the weld.
- It is a good idea to use heat chalk to keep a check on the temperature.
- To prevent moisture pickup, the filler material must be stored as per the manufacturer’s recommendations.
- If pre-heating is necessary it must be done before the stitching.
Recommended filler material for Bruxite 400 and Bruxite 500
Manual welding electrode (welding pin)
OK 48.30, OK 48.00 (E7018), OK 74.78 (E9018-D1) or equivalent.
MAG Welding (Gas metal arc welding)
OK Autorod 12.51, OK Autorod 12.50 (ER70S-6), OK Autorod 13.13, OK Tuberod 14.13 (E70C-6M).
Argon gas with 16% CO2 or 23% CO2 is recommended as a shielding gas.
