Instructions / Assembly

- 11 -
of the welding electrode and the thickness of the plate is as follows.
Thickness
of Welded
Parts（㎜）
＜4
4 ～ 8
＞ 8 ～ 12
＞ 12
Diameter of
Welding
Electrode
（ф㎜）
≤ 3.5
ф3 ～ 4
ф4 ～ 5
ф5 ～ 6
2. Welding Current: The welding current depends on the electrode,
electrode diameter, thickness of the welded parts, and joint type weld
position. Other factors to consider are the structural steel welding
electrode flat welding positions, and the welding current based on the
following empirical formula to primary selection.
K =Id I--Welding Current K--Empirical Coefficient d--Diameter of
Welding Electrode
Relationship between the empirical coefficient of welding current and the
diameter of the welding electrode.
Diameter of
Welding
Electrode
（㎜）
ф1.6
ф2 ～ 2.5
ф3 ～ 4
ф4 ～ 6
Empirical
Coefficient
（A/mm）
20 ～ 25
25 ～ 30
30 ～ 40
40 ～ 50
The current of vertical welding, horizontal welding, and over-head welding
should be 10 ~ 20% less than that of flat welding. The current of fillet
welding should be 10 ~ 20% larger than that of flat welding. For alloy steel
electrodes, stainless steel electrodes, due to the high thermal expansion
coefficient of resistance, if the current is high, the welding rod is prone to