If the Current/Amperage (Wire Speed) is too high for the welding voltage, “stubbing” will occur as the
wire dips into the molten pool and does not melt. Welding in these condi ons normally produces a poor
weld due to lack of fusion.
If, however, the welding voltage is too high, large drops will form on the end of the wire, causing spa er.
The correct se ng of voltage and Current (Wire Speed) can be seen in the shape of the weld deposit
and heard by a smooth regular arc sound.
Material
Wire Type
Shielding
Gas
Wire
Size
Weld Posi on
Amperage
Range
Voltage
Range
Mild Steel
Solid Mild Steel
(E70S-6)
Argon +
CO
2
Mix
0.6mm All
50 – 80
18 – 20
0.8mm All
60 – 220
16 – 22
0.9mm All
120 – 350
15 – 23
Gasless Flux-cored
Mild Steel
(E71T-11)
Not
required
0.8mm
Horizontal
90 – 150
14 – 16
Ver cal & Overhead 60 – 125
10 – 12
0.9mm
Horizontal
80 – 200
12 – 17
Ver cal & Overhead 70 – 150
12 – 15
1.2mm
Horizontal
160 – 220
16 – 18
Ver cal & Overhead 120 – 180
16 – 18
Stainless
Steel
Stainless Steel
316L
Argon or
Mix
0.8mm All
60 – 125
17 – 22
0.9mm All
75 – 160
17 – 22
Aluminium Aluminium (5356) Argon
1.0mm All
170 – 200
19 – 21
Table 10
These se ngs are a guide only. Actual se ngs required will depend on plate thickness, operator technique,
environment, etc.
The choice of Welding wire size and shielding gas used depends on the following:
1. Thickness of the metal to be welded
2. Type of joint
3. Capacity of the wire feed unit and power source
4. The amount of penetra on required
5. The deposi on rate required
6. The bead profile desired
7. The posi on of welding
8. Cost of the wire
9. Environment (can shielding gas be used or not?)
5.10 Suggested Settings for Typical MIG Applications
5.11 Welding wire Size Selection
5.9.4 How to determine correct Wire Speed/Voltage Setting
17
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