Plasma Cutter Welding Symbols

Welding Symbols and Definitions

• Basic Welding Symbols



• Supplementary Welding Symbols



• Elements of Welding Symbols



• Welding Processes and Letter Designations

Welding Symbol Name	Welding Defintion	Symbol
BEAD	A type of weld created by one or more string or weave beads deposited on an unbroken plane
FILLET	Type of weld, approximately triangular cross section joining two surfaces at approximately exact angles to each other.
PLUG	A circular fusion weld through in the hole of a slotted lap or tee joint.
SQUARE	A type of groove weld with a small separation at the edges of the base metal parts.
V-Groove	A groove weld in which the joint edge of each member is beveled from the similar side.
BEVEL	A type of groove weld in which one member has a joint edge beveled from one side
U Groove	A groove weld in which the joint edge of both members is equipped in the form of a J from one side, giving a final U form to the fulfilled weld.
J Groove	A type of groove weld in which one member has a joint edge in the form of a J from one part.
FLARE V	A type of groove weld, generally used to join two round or curved parts.
FLARE BEVEL	A type of groove weld, generally used to join a round or curved piece to a level piece.
SEAM	A type of welding, continuous weld made between or upon overlapping metal parts.
Back	A type of weld deposited at the back of a single groove weld
Surfacing	A type of weld which consists of one or more stringer beads or weave beads deposited on an steady surface in order to create desired dimensions or properties..
Edge	A weld that is improperly positioned compared to current workpiece design. Edge welds are those welds that stroke or extend beyond the edge of the workpiece.
Cornor	A type of joint between two metal parts located at exact angles to one another. It requires large amounts of weld metal.

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Welding Symbol Name	Definition	Symbol
Weld All Around	-
Field Weld	A type of weld made at the construction site.
Melt-thru	-
Backing or Special Material	A type of weld bead applied to the root of a single groove joint to declare complete root diffusion.
Flush	-
Convex	-
Concave	A type of fillet weld having a concave surface.

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Welding Processes and Letter Designations

The AWS definition for a welding process is "a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone and with or without the use of filler material".

This table shows the letter designation for each welding process. The letter designation assigned to the welding process can be used for identification on drawings, tables, etc.

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