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Ultratherme-H4R is moisture resistant hydrogen controlled basic coated electrode. It is ideally suited for welding high strength low alloy steels, fine-grained steels, Q&T steels, etc. The weld metal possesses high strength combined with good toughness properties. Ideal for welding high strength steels used in earth moving industry, etc.
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.
Element | C | Mn | Si | Mo | Ni | Cr | S | P |
Percent | 0.06 | 1.40 | 0.25 | 0.50 | 2.20 | 0.20 | 0.018 | 0.018 |
UTS | YS | Elongation | CVN Impact Strength (J) |
(MPa) | (MPa) | (L= 4d)% | at Minus 40°C |
790 | 700 | 19 | 35 |
DIFFUSIBLE HYDROGEN CONTENT: 4 ml / 100 gms of weld metal Max.
MOISTURE AS CONDITIONED: 0.15 Max
MOISTURE AS EXPOSED (80% RH, 27°C FOR 9 HRS): 0.40 Max
ADVANTAGE: Electrodes are Vacuum packed, no need of drying and can be used straight on the job.
Size (mm) | 5x450 | 4x450 | 3.15x450 | 2.5x350 |
Current Range (Amps) | 200-260 | 140-190 | 100-150 | 70-100 |
Qty. (Pcs./Carton) | 2 | 2 | 2 | 2 |