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J421 Mild Steel Electrode


In accordance with GB E4313

Correspondence to AWS E 6013

Description: J421 is of low mild steel type electrodes with titanium coating. It has excellent welding technological performances. There is stable and spatter loss negligible. The slag 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 unfavorable conditions.

Application: For welding structures of steel sheets, vehicles, buildings, vessels. Machinery-manufacture and various structures of low mild steel.


Typical chemical composition of weld metal(%)
C
Mn
Si
S
P

<=0.10

0.32-0.55

<=0.30

<=0.030

<=0.040


Typical mechanical properties of weld metal
Yield Point
Tensile Strength
Elongation
Charpy V Impact Value
- 20oC
Bend Test (Degree)

>=34kgf/mm2 >=330N/ mm2

>=43kgf/mm2 >=420N/ mm2

>=22%

>=60J >=6.0kg-M

120


Recommended current (AC of DC +)
Diameter(mm)
2.0
2.5
3.2
4.0
5.0
Amp

Flat

40-70

50-90

90-130

140-190

180-240

Vertical up

40-60

50-80

80-120

120-170

160-210


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