STEELOMATIC-309 Cb
STEELOMATIC-309 Cb
DESCRIPTION AND APPLICATIONS: STEELOMATIC – 309 Cb is a rutile type all position electrode giving 25Cr/12Ni – Columbium stabilised weld deposit. The weld deposit can stand up to 1100°C in continuous service. The columbium provides resistance to intergranuler corrosion and also provides higher strength at elevated temperature services. The electrode gives excellent resistance to chemical corrosion and heat. Ideal for similar composition stainless steel in cast or wrought form. Joining stainless steel to low alloys steels and carbon steel, dissimilar combinations of 18-8Cb stainless steel to Mild steel, clad steel.
NOTES ON USAGE:
- Ensure that electrodes are dry enough. In case of moisture pick-up, ready the electrodes at 250°C for 30 to 60 minutes. Thereafter, either allow the oven to cool slowly to about 60° C, or transfer them to a holding oven maintained at 50°C – 60°C.
- Clean the joint faces to remove moisture, grease or any foreign matter.
- Employ welding currents within the prescribed range.
- Keep the arc as short as possible.
- Restrict weaving of electrode to within two and a half times the core wire diameter.
- Use stainless steel wire brush for cleaning the weld beads.