MESSER SolidWELD MIG 250GS Guide D'utilisation page 16

016 MIG 250GS Operating manual
Electrodes and Typical Applications
Name AWS
Class.
SolidSTRIKE MSS E6013
SolidSTRIKE MSS E7024
SolidSTRIKE MSS E7018-1 A premium quality all positional
Electrode Size
The size of the electrode is generally dependent on the thickness
of the section being welded, and the larger the section the larger
the electrode required. In the case of light sheet the electrode size
used is generally slightly larger than the work being welded. This
means that if 1.5 mm sheet is being welded, 2.0 mm diameter
electrode is the recommended size. The following table gives the
recommended maximum size of electrodes that may be used for
various thicknesses of section.
Application
A premium quality electrode for
general structural and sheet metal
work in all positions including vertical
down using low carbon steels
An iron powder electrode for high
speed welding for H-V fillets and
flat butt joints. Medium to heavy
structural applications in low carbon
steels
hydrogen controlled electrode for
carbon steels in pressure vessel
applications and where high integrity
welding is required and for free-
machining steels containing sulphur
Recommended Electrode Sizes
Average Thickness
of Plate or Section
≤1.5 mm
1.5–2.0 mm
2.0–5.0 mm
5.0–8.0 mm
Welding Current
Correct current selection for a particular job is an important factor in
arc welding. With the current set too low, difficulty is experienced
in striking and maintaining a stable arc. The electrode tends to stick
to the work, penetration is poor and beads with a distinct rounded
profile will be deposited.
Excessive current is accompanied by overheating of the electrode.
It will cause undercut, burning through of the material, and give
excessive spatter. Normal current for a particular job may be
considered as the maximum which can be used without burning
through the work, over-heating the electrode or producing a
rough spattered surface, i.e. the current in the middle of the
range specified on the electrode package is considered to be the
optimum.
In the case of welding machines with separate terminals for
different size electrodes, ensure that the welding lead is connected
to the correct terminal for the size electrode being used. When
using machines with adjustable current, set on the current range
specified.
The limits of this range should not normally be exceeded.
The following table shows the current ranges generally
recommended for SolidSTRIKE MSS E6013.
Maximum Recommended
Electrode Diameter
2.0 mm
2.5 mm
3.15 mm
4.0 mm