Electrodes of this classication are used for welding 9% Nickel steel base metal are ASTM A333, A334, A353, A522, and A553 etc.
Vaccum packing
1G 2F 3G 4G
1) Chip off base metal completely at the repairing part .
2) There is possiblity that cracks spreads or makes holes at both ends of repairing part .
3) Keep the weld metal length less than 50 mm (2 inch ) to disperse welding heat- adopt back steping stone or symmetry method by turns.
4) The preheat temprature vary in accordance with te size ,king and shape of the base metal 150°C is appropriate in general .
| C% | Mn% | Si% | S% | P% | Cr% | Ni% | Mo% |
|---|---|---|---|---|---|---|---|
| 0.10 Max | 2.0 – 4.0 | 1.00 Max | 0.020 Max | 0.030 Max | 12.0 – 17.0 | 55.0 Min | 5.0 – 9.0 |
| U.T.S. (N/mm²) | ELONGATION ( L = 4d ) % | BEND TEST |
|---|---|---|
| 620 Min | 20 % Min | Satisfactory |
| SIZE ( mm ) | KG PER PACKET | KG PER CARTON | Current (Amps) | In Amps |
|---|---|---|---|---|
| 2.50 x 350 | 2 | 10 | DC (+) | 80 – 100 |
| 3.15 x 350 | 2 | 10 | 100 – 140 | |
| 4.00 x 350 | 2 | 10 | 140 – 180 | |
| 4.00 x 350 | 2 | 10 | 180 – 230 |