Cromotherme-1(H4R) is basic coated, low hydrogen, moisture resistance type electrode. Weld metal display remarkable strength and creep resistance at elevated temperatures up to 550°C. Electrode is used for welding creep resistant 0.5Cr - 0.5Mo and 1Cr - 0.5Mo steels. Typical applications include steam boiler construction, welding of steam and super-heater piping, power plants, oil refinery and chemical plants.
1. Use short arc and stringer bead.
2. Re-dry the electrodes at 250°C for one hour, if expose to atmosphere.
(PWHT: 690°C FOR 1 HR)
As Conditioned: 0.20 % Max.
As Exposed: 0.40 % Max. (27°C and 80% Relative Humidity for 9 Hours)
DIFFUSIBLE HYDROGEN CONTENT: 4 ml/100 gms of weld metal Max.
|Current Range (Amps)||180-240||140-180||100-130||70-100|
Electrodes are Vacuum packed, no need of drying and can be used straight on the job.