Electrodes for Creep Resisting Steels

Cromotherme-12 is a lime-fluoride type electrode yielding a deposit containing 11Cr - 0.5Ni - 1.0Mo - 0.3V - 0.5W. The weld metal has excellent creep and oxidation resistant properties up to 700°C. The electrode is used for welding creep resistant 12Cr steels in turbines, steam boilers and chemical plant, where operating temperatures of the order of 600°C are encountered. Following are some of the creep-resistant steels that can be welded.

DIN: X 20 Cr Mo 12 1, X 22 Cr Mo V 12 1 , X 20 Cr Mo W V 12 1, G X 22 Cr Mo MV 12 1

1. Ensure the electrodes are dry. Re-dry the electrodes at 300°C for 2 hours.

2. Use short arc and stringer bead.