Objectives
After studying this chapter, you will be able to:
• Identify the basic types of weld joints.
• Recognize the types of welds made for each type
of joint.
• Identify some modified weld joint configurations.
• Interpret introductory welding terminology and
symbols.
• Describe how weld designs and joints are
evaluated.
Important Terms
buttering
interpass temperature
joint
mismatch
postheating
preheating
stringer beads
surfacing
tooling
welding symbol
Joint Types
A joint is the junction or edges of members that are
joined. There are five basic types of joints, Figure 6-1:
• Butt joint.
• T-joint.
• Lap joint.
• Corner joint.
• Edge joint.
Weld Joint Preparation
Weld joints may be initially prepared in a number of
ways, including:
• Shearing.
• Casting.
• Forging.
• Machining.
• Stamping.
• Filing.
• Routing.
• Oxyacetylene cutting (thermal cutting process).
• Plasma-arc cutting (thermal cutting process).
• Grinding.
The final preparation of the joint before welding
will be discussed in subsequent chapters covering the
welding of a particular metal.
Weld Joints and
Weld Types
6 6
CHAPTER
47
Figure 6-1. Five basic types of weld joints used in FCAW.
Butt T
Lap Corner
Edge