Supratherme-Ni(Spl)H4R is a basic coated, low hydrogen, moisture resistant, iron powder type electrode yielding a weld metal containing 1.5Mn and 0.7Ni. Excellent quality welds for welding heavy sections of fine-grained high strength steels with particular reference to low temperature service down to minus 50°C. Typical applications include welding of fine grained Q&T steels for pressure vessels, tanks, penstocks, where high strength and sub-zero temperature toughness properties are of importance.
1. Restrict the heat input, use short arc and stringer bead.
2. Re-dry the electrodes at 250°C for 1 hour, if expose to atmosphere.
|UTS||YS||Elongation||CVN Impact Strength (J)|
|(MPa)||(MPa)||(L= 4d)%||at Minus 50°C|
• As Conditioned: 0.20% Max.
• As Exposed: 0.40% Max. (27°C and 80% Relative Humidity for 9 Hours)
4.0 ml/100 gms of weld metal.
Electrodes are Vacuum packed, no need of drying and can be used straight on the job.
|Current Range (Amps)||170-240||140-170||100-130||70-90|