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Welding Refresher: Welding Symbols 2

Pop quiz!

Every now and then it’s good to make sure you still understand the most basic elements of welding. Understanding welding symbols is not only a basic element of welding, it’s also one of the most important.

Ready to identify 8 more types of groove welds? Wipe the sweat off your brow before the others notice. This should be an easy one.

Look at the chart below and see if you can correctly name each symbol. The answers are posted below. No peeking!

The charts and definitions below are all provided by AWS Jefferson's Welding Encyclopedia.




Alright, time’s up! Here are the answers:



Fillet Weld

A weld of approximately triangular cross section joining two surfaces approximately at right angles to each other in a lap joint, T-joint, or corner joint.


Plug or Slot Weld

PLUG: A weld made in a circular hole in one member of a joint fusing that member to another member: A fillet-welded hole is not to be construed as conforming to this definition.

SLOT: A weld made in an elongated hole in one member of a joint fusing that member to another member. The hole may be open at one end. A fillet welded slot is not to be construed as conforming to this definition.


Stud Welding

A general term for joining a metal stud or similar part to a workpiece. Welding may be accomplished by arc, resistance, friction, or other process with or without external gas shielding.

Spot or Projection Welding

Spot welding, in principle, is produced by holding two sheets in close contact between two copper electrodes, and passing a low-voltage, high current through the circuit for a short period of time. Fusion immediately takes place between the two sheets, while the excess heat is rapidly carried away from the outside surfaces by water-cooled electrodes.

Projection: A resistance welding process that produces a weld by the heat obtained from the resistance to the flow of the welding current. The resulting welds are localized at predetermined points by projections, embossments, or intersections


A continuous weld made between or upon overlapping members, in which coalescence may start and occur on the faring surfaces, or may have proceeded from the outer surface of one member: The continuous weld may consist of a single weld bead or a series of overlapping spot welds.


Back or Backing Weld

A weld made at the back of a single groove weld.


Surfacing Weld

A weld applied to a surface, as opposed to making a joint, to obtain desired properties or dimensions.

Flange Weld

A nonstandard term for a weld in a flanged joint.

How many of the symbols did you correctly identify? What steps do you take to keep basic welding knowledge fresh in your mind?

The post Welding Refresher: Welding Symbols 2 appeared first on Weld My World.

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