|
Description: J421 is of low mild steel type electrodes with titania coating. It has excellent welding technological perfomances. The arc is stable and spatter loss negligible. The siag is fluid and when hardened it is compact and easy to remove. The welds have smooth appearance. It is suitable for all position welding of steel sheets and irregular joints even under unfavourable conditions.
Applications: For welding structrues of steel sheets , vehicles, buildings, vessels, machinery-manufacture and various structures of low mild steel.
| In accordance with GB E4313 |
| Corresponding to JIS D4313 |
| |
| Typical chemical composition of weld metal(%) |
C |
Mn |
Si |
S |
P |
0.09 |
0.40 |
0.20 |
0.015 |
0.023 |
|
| |
| Typical mechanical properties of weld metal metal |
Yield Point |
Tensile Strength |
Elongation |
Charpy V Impact Value 0 ℃ |
Bend Test (Degree) |
39Kg/mm2
400n/mm2 |
48Kg/mm2
490n/mm2 |
26% |
70J
70Kg-M |
120 |
|
| |
| Recommended current(AC or DC+) |
Diameter(mm) |
2.0 |
2.5 |
3.2 |
4.0 |
5.0 |
Amp |
Flat |
40-60 |
55-96 |
80-130 |
130-190 |
200-250 |
Vertical Up |
30-55 |
50-90 |
70-120 |
120-170 |
150-200 |
|
|
