Figure 3-13.Standard groove welds.
TYPES OF WELDS
Some of the com-
the bead, groove,
There are many types of welds.
mon types you will work with are
fillet, surfacing, tack, plug, slot, and
As a beginner, the first type of weld that you learn
to produce is called a weld bead (referred to simply as
a bead). A weld bead is a weld deposit produced by a
single pass with one of the welding processes. An ex-
ample of a weld bead is shown in figure 3-12. A weld
bead may be either narrow or wide, depending on the
amount of transverse oscillation (side-to-side move-
ment) used by the welder. When there is a great deal of
oscillation, the bead is wide; when there is little or no
oscillation, the bead is narrow. A weld bead made with-
out much weaving motion is often referred to as a
stringer bead. On the other hand, a weld bead made
with side-to-side oscillation is called a weave bead.
Groove welds are simply welds made in the groove
between two members to be joined. The weld is adapt-
able to a variety of butt joints, as shown in figure 3-13.
Groove welds may be joined with one or more weld
beads, depending on the thickness of the metal. If two
or more beads are deposited in the groove, the weld is
made with multiple-pass layers, as shown in figure
3-14. As a rule, a multiple-pass layer is made with
stringer beads in manual operations. As a Steelworker,
you will use groove welds frequently in your work.
Another term you should be familiar with, when
making a multiple-pass weld, is the buildup sequence,
as shown in figure 3-15. Buildup sequence refers to the
Figure 3-14.Multiple-pass layers.
Figure 3-15.Weld layer sequence.
order in which the beads of a multiple-pass weld are
deposited in the joint.
NOTE: Often welding instructions specify an in-
terpass temperature. The interpass temperature refers
to the temperature below which the previously
deposited weld metal must be before the next pass may