Electrodes for Low Temperature Service
DK-18Ni (Mod)
AWS: SFA 5.5 E8018-G
EN ISO CODE:
DK-18Ni(Mod) is a basic coated low hydrogen electrode for low temperature application welding. Suitable for welding of DMR grade fine-grained steel, heavy section fabrication, pressure vessels, penstock pipelines, fine grained quenched & tempered steels, etc where high stress & dynamic loading service applications are involved. The weld metal is of radiographic quality. Typical material grades suitable for welding with this electrodes are- DMR 249A, C/D grades of ASTM SA-414, Grade 55 & 60 steels of SA-516, Steels conforming to SA-814, IS: 2002, IS: 2062 and equivalent grade of steels.
Approvals
Indian Navy
CHEMICAL COMPOSITION OF ALL WELD METAL (%)
| Element | C | Mn | Si | S | P | Ni |
| Percent | 0.10 Max | 0.60-1.50 | 0.35 Max | 0.015 Max | 0.030 Max | 2.0-3.5 |
MECHANICAL PROPERTIES OF ALL WELD METAL
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| Property | UTS | (MPa) | YS | (MPa) | Elongation | (L=5d)% | CVN Impact Strength at | minus 50 | °C (J) | ||||
| Range | 600 Min | 500 Min | 22.0 Min | 50 Min |
DIFFUSIBLE HYDROGEN CONTENT
< 4 ml/100 gms of weld metal by mercury method
WELDING POSITION
F, H, VU, OH.
CURRENT & PACKING DATA - DC (+)
| Size (mm) Dia x Length | 5 x 450 | 4 x 450 | 3.15 x 350/450 | 2.5 x 350 |
| Current Range (Amps) | 180-220 | 140-180 | 100-140 | 60-90 |
| Qty. (Pcs./Carton) | 45 | 70 | 100 | 150 |
| Qty. (kgs/Carton) Vacuum | 2 | 2 | 2 | 2 |
| Qty. (Cartons/Box) Pcs. | 4 | 4 | 4 | 4 |
| Qty. (Cartons/Box) kgs Vacuum | 6 | 6 | 6 | 6 |
