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MIG 250GS Operating manual
Generally Recommended Current Range for SolidSTRIKE MSS E6013
Size of Electrode (mm) Current Range (Amp)
2.5 75–95
3.2 110–150
Arc Length
To start the arc, the electrode should be gently scraped on the work
until the arc is established. There is a simple rule for the proper arc
length; it should be the shortest arc that gives a good surface to
the weld. An arc too long reduces penetration, produces spatter
and gives a rough surface finish to the weld. An excessively short
arc will cause sticking of the electrode and rough deposits that are
associated with slag inclusions.
For downhand welding, it will be found that an arc length not
greater than the diameter of the core wire will be most satisfactory.
Overhead welding requires a very short arc, so that a minimum
of metal will be lost. Certain SolidSTRIKE electrodes have been
specially designed for ‘touch’ welding. These electrodes may be
dragged along the work and a perfectly sound weld is produced.
Electrode Angle
The angle which the electrode makes with the work is important to
ensure a smooth, even transfer of metal. The recommended angles
for use in the various welding positions are covered later.
Correct Travel Speed
The electrode should be moved along in the direction of the joint
being welded at a speed that will give the size of run required. At
the same time the electrode is fed downwards to keep the correct
arc length at all times. As a guide for general applications the table
below gives recommended run lengths for the downhand position.
Correct travel speed for normal welding applications varies between
approximately 125–375 mm per minute, depending on electrode
size, size of run required and the amperage used.
Excessive travel speeds lead to poor fusion, lack of penetration, etc.
Whilst too slow a rate of travel will frequently lead to arc instability,
slag inclusions and poor mechanical properties.
Run Length per Electrode – SolidSTRIKE MSS E6013
Electrode
Size (mm)
Electrode
Length (mm)
Run Length
(mm)
Minimum Maximum
3.2 350 125 225
2.5 350 100 225
Correct Work Preparation
The method of preparation of components to be welded will depend
on equipment available and relative costs. Methods may include
sawing, punching, shearing, lathe cut-offs, flame cutting and others.
In all cases edges should be prepared for the joints that suit the
application. The following section describes the various joint types
and areas of application.
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