Weldmatic 200i AC/DC
Model No MC105, Iss A 02/16
5
1 Introduction
MMAW (Stick Welding)
Manual Metal Arc Welding (MMAW) is a
process where an arc is struck between a
flux-coated consumable electrode and the
work piece. The arc and the weld pool are
both shielded by gases generated by the flux
coating of the electrode.
The Weldarc 200i has been designed to
be used with 2.0mm, 2.5mm, 3.2mm and
4.0mm diameter electrodes. The smaller
electrodes are used when welding at lower
currents, such as sheet metal applications.
Increasing the electrode diameter permits
higher welding currents to be selected.
WIA supplies a wide range of mild steel and
special purpose electrodes which cater for home
workshop, rural, and industrial requirements.
Some popular AUSTARC electrodes are listed
below. The correctly selected AUSTARC
electrode will influence the quality of the weld,
and the stability of the arc.
Austarc 12P, Classification E4313-A
A popular general purpose electrode
used with ease in all positions, vertical up
or down. The smooth forceful arc makes
it an ideal electrode for all general mild
steel applications.
Austarc 13S, Classification E4313-A
A smooth running electrode with a soft arc,
particularly suited to light sheetmetal and
smooth mitre fillet welds.
Austarc 16TC, Classification E4916-A
A low hydrogen electrode with good
arc stability and out-of-position welding
characteristics. This electrode is ideal
for medium carbon steels, or steels of
unknown analysis.
Austarc 11, Classification E4311-A
A high cellulose electrode for all positional
welding, AC or DC. Particularly suited for
vertical and incline pipe welding where
complete root penetration is required.
Unicord 312, Classification ES312-16
A high tensile (50tsi), chromium nickel
electrode specially formulated for joining
all alloy steels and irons, and for tool and
die maintenance.
GTAW (TIG Welding)
Gas Tungsten Arc Welding (GTAW) is a
welding process where the arc is struck
between a non-consumable tungsten
electrode and the work piece. A ceramic
nozzle surrounds the tungsten electrode and
directs a flow of inert gas, usually Argon,
over the electrode and the weld zone. If
filler metal is required, it is hand fed into
the welding arc. The DC current output of
the Weldarc inverter is suitable for welding
most ferrous and non-ferrous metals. The AC
current output is for welding Aluminium.
