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FIELD WELD SYMBOL

A symbol used to indicate that the weld is to be done at field site and not where the unit is first made.

MELT-THROUGH SYMBOL

A symbol used when complete joint penetration is required in a weld made from only one side.

CONTOUR SYMBOL

A symbol used with the weld symbol when the finished shape of the weld is important.

JOINT PENETRATION

A term referring to the distance the weld metal extends from the weld face into a joint.

ARROW SIDE

A term referring to the lower side of the reference line that indicates the same side or near side of the joint.

OTHER SIDE

A term referring to the upper side of the reference line that indicates the far side of the joint.

NON PREFERRED WELD SYMBOLS

A term that referring to symbols that have been placed by new ones. Although not used on newer prints, they might be still found on older prints.

BENT LEADER (BROKEN LEADER)

A term used to describe the arrow for a bevel or j-groove weld. The arrow head points to the particular section to be prepared.

JOINT

A way of arranging metal pieces in relation to each other so they can be welded.

BACK WELD

A weld made to ensure full weld material through the joint. It is made after the required weld indicated by the symbol and is sometime called the complete joint penetration.

SUPPLEMENTARY SYMBOLS

Additional symbols often included with basic weld symbols to provide more specific weld data not provided by other elements in the welding symbol.

SURFACING WELD (bead weld)

Consists of a narrow layer (or layers) of metal deposited in an unbroken puddle on the surface of the metal.

METAL

Described as a tough, malleable material with high tensile strength and the ability to withstand high temperatures with out melting or burning

GROOVE WELD

Is a weld made in a groove on one or both surfaces to be joined.

FERROUS METAL

Metal that contains iron

NON FERROUS METAL

Metal that contains no iron

WELD SYMBOL

One part of the welding symbol, a basic weld symbol shows the cross-sectional shape of the weld or joint.

NOTATION

Refers to information called out in the tail of a welding symbol.

BEVEL ANGLES

the angle formed between the bevel of one piece and a plane perpendicular to the surface of the piece. Usually refers to an angle made on the base metal before welding on a single plate.

BASE MATERIAL (PARENT METAL)

the material being welded

WELD LEG

the vertical or horizontal distance from the base material to the toe of the weld

REINFORCEMENT

the weld buildup above the surface of the base material on a butt joint

PLUG & SLOT WELDS:

welds made through one circular or elongated hole in a piece of metal to join it to another piece of metal.

FINISH SYMBOL

This symbol is included with a contour symbol if a weld is to be finished.

FILLET GAUGE

used to measure the distance of the weld leg

WELDING SYMBOL

A graphic assembly of the elements needed to fully specify weld requirements.

RESISTANCE SPOT WELD

A individually formed weld where the shape and size of the weld nugget is limited by the size and contour of the welding electrodes.

ALLOY

A mixture of two or more metals

RESISTANCE SEAM WELD

A series of overlapping welds made progressively along the joint by rotating electrodes.

WELD-ALL-AROUND SYMBOL

A supplementary symbol that signifies the weld is to be made completely around the joint with out interruption.

ARROW

A symbol used to connect the reference line of a welding symbol to one side of the joint to be welded.

BACKING WELD SYMBOL

A symbol used to indicate a bead-type backing weld on the opposite side of the regular weld.

STRUCTURAL

Stock structural shapes that have been cut, machined, shaped, bent, rolled, spun, stamped, or drawn and combined with castings, forgings, and extrusions can be found in all products fabricated by welding.

TAIL

The part of a welding symbol containing any notes relevant to the process, filler metal, or any standards to establish specific weld requirements.

REFERENCE LINE

The required central element of a welding symbol. Other elements describing weld requirements are located on or near the reference line.

GROOVE ANGLE

The total angle formed between the groove face of one work piece and the groove face on the other work piece.

METAL SPECIFICATIONS

Usually located in a special section of the title block. There are times when the metal specs may be given elsewhere on the drawing.

BASE METAL

When a pure metal is used as the principal alloying agent in an alloy.

WELD SIZE

a dimension shown in inches/fractions of an inch, millimeters, or degrees (an angle) The weld length dimension is shown on the left of the welding symbol.

WELD LENGTH

a dimension shown in inches/fractions of an inch, millimeters, or degrees (an angle) The weld length dimension is shown on the right of the welding symbol.

PURE METAL

a pure metallic metal

FILLET WELD

approximately triangular in shape and is used when joining two surfaces at an angle.

WELD ROOT

is the deepest penetration of the weld into the base material

WELD FACE

is the ex[posed surface of the weld