Spot weld symbol
Also called Resistance spot weld
A spot weld joins overlapping sheets at discrete points. Resistance spot welds are made between two electrodes and have no arrow side or other side.
What the spot weld symbol means
A spot weld joins overlapping sheets at discrete points. Resistance spot welds are made between two electrodes and have no arrow side or other side.
AWS A2.4 and ISO symbols
Spot weld. The same circle, centred on the line when the weld has no side.
ISO SVGWhere you see it
Sheet metal assemblies, enclosures, panels and automotive work.
What is written next to it
On the welding symbol, the spot weld carries the spot diameter or strength, the number of welds and their spacing.
How it is inspected
Inspection of a spot weld usually covers visual inspection and destructive tests on sample coupons, such as peel or chisel tests. Each inspection is recorded against the weld, so the joint can be signed off with its evidence. See the ITR guide.
Related symbols
Frequently asked questions
What does the spot weld symbol look like?
On AWS A2.4 drawings: A circle centred on the reference line for a resistance spot weld. Fusion spot welds sit on the arrow or other side. In ISO 2553: The same circle, centred on the line when the weld has no side.
Is the spot weld symbol the same in ISO and AWS?
Yes, it is drawn the same way in most legends.
Where is a spot weld used?
Sheet metal assemblies, enclosures, panels and automotive work.
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