Electrodes of the T-1 group are designated
for C02 shielding gas by this specification and are used
with DCEP. However, gas mixtures of argon and C02 are
also used to improve usability, especially for out-of-position
applications. Decreasing amounts of COz in the argon-
COz mixture will increase manganese and silicon in
the deposit and may improve the impact properties. These
electrodes are designed for single- or multiple-pass welding.
The T-1 electrodes are characterized by a spray transfer,
low spatter loss, flat to slightly convex bead configuration,
and.a moderate volume of slag which completely
covers the weld bead.