Welding of grain refined steels. Q&T steel, HSLA steel, and ASTM A615 Grade 60 steel, structural fabrication, Penstocks, Tanks, pressure vessels.
1G 2F 3G 4G
1) Dry the electrodes at 250 – 300°C for 60 min before use.
2) Keep the arc as short as possible .
3) Adopt back step method or strike the arc on a small plate
prepared for this particular purpose because ar stricking o
the base metal is in danger of initing cracking.
| C% | Mn% | Si% | S% | P% | Ni% | Mo% |
|---|---|---|---|---|---|---|
| 0.10 Max | 1.70 Max | 0.80 Max | 0.030 Max | 0.030 Max | 1.40 Max | 0.50 Max |
| U.T.S.(N/mm²) | Y.S.(N/mm²) | ELONGATION ( L = 4d ) % | IMPACT ( CVN )AT – 51 o C ( J) | HARDNESS |
|---|---|---|---|---|
| 630 Min | 550 Min | 20 % Min | 40 Joules Min | 200 BHN Max |
| SIZE ( mm ) | KG PER PACKET | KG PER CARTON | Current (Amps) | In Amps |
|---|---|---|---|---|
| 2.50 X 350 | 5 | 20 | AC/DC (+) | 70 – 100 |
| 3.15 X 350 | 5 | 20 | 100-140 | |
| 4.00 X 350 | 5 | 20 | 140-180 | |
| 5.00 X 350 | 5 | 20 | 180-230 |