Electromagnetic radiation at wavelengths shorter than violet light and just beyond the visible light spectrum. Sunlight includes ultraviolet radiation, which causes tanning or sunburn in human skin and which may cause chemical or structural changes in some commercial materials. Aluminum reflects ultraviolet radiation and is not damaged by it.

Is insufficient metal in one or more locations within the die aperture and is the result of a situation where hollow die ports or flow plate openings do not permit uniform metal flow to all areas of the extrusion die.

The result of curing a paint at either too low of a temperature or too little time, resulting in inadequate hardness and solvent resistance.

Volatile organic compound; any organic compound that participates in atmospheric photochemical reactions as designated by EPA standards.

A material which prevents or impedes the passage of water vapor through the walls of a structure or container. Aluminum is an excellent vapor barrier.

The action of relieving entrapped air or gases by a venting or burp procedure during the extrusion process.

A small protrusion on a forging resulting from the entrance of metal into a die vent hole.

That property of a liquid which enables it to resist flow. High viscosity means a fluid resists flowing; low viscosity means it flows readily.

An empty space. In extrusion, the number, sizes, positions, and forms or voids within a hollow shape influence the difficulty of production and the dimensional tolerances which can be assured.

A ripple effect, usually in the leg or legs of an extrusion, caused primarily by either an excessive deflection in the tooling, excessive heat or unbalanced feed.

(1) A single thickness of foil as it leaves the rolling mill. (2) A connecting element between ribs, flanges, or bosses on shapes and forgings.

The supporting members of a hollow die mandrel that support the internal surface forming portion of the die.

To join two pieces of metal by applying heat or pressure, causing them to melt in the welded area, mingle and resolidify, forming a single piece.

The space directly between the web of the mandrel and the die plate, designed to facilitate welding of the billet back together before it is extruded through the die aperture or opening.

A region in extruded hollow profiles observed after creating the two streams of metal within the die and rejoining them around the web of a porthole or bridge die. Weld lines may appear as a narrow, dark line.

The junction line of metal that has passed through a die forming a hollow profile (shape), separated and not completely rejoined. Flare testing is a method of evaluating weld integrity.

Joining two or more pieces of aluminum by applying heat or pressure, or both, with or without filler metal to produce a localized union through fusion or recrystallization across the interface. (In cold welding, it is a solid state welding process in which pressure is used at room temperature to produce coalescence of metals with substantial deformation at the weld.)

A rolled, extruded, or cast round filler metal for use in joining by welding.

Wire for use as filler metal in joining by welding.

The degree to which a metal surface may be wet to determine the absence of or the amount of residual rolling or added lubricants or deposits on the surface.

A solid wrought product that is long in relation to its cross section, which is square or rectangular with sharp or rounded corners or edges, or is round, hexagonal, or octagonal, and whose diameter or greatest perpendicular distance between parallel faces is less than 0.375 inch.

A composite wire product comprised of an aluminum-alloy wire having on its surface a metallurgically bonded aluminum or aluminum-alloy coating that is anodic to the alloy to which it is bonded, thus electrolytically protecting the core alloy against corrosion.

Wire of quality suitable for use in the manufacture of cold-headed products such as rivets and bolts.

Wire brought to final dimensions by drawing through a die.

Is an electrical discharge machining except that a wire is used as the electrode and the dielectric is frequently ionized water. These machines are numerically controlled and computer programmed.

Wire produced by hot extruding.

Wire having two parallel flat surfaces and rounded edges produced by roll-flattening round wire.

Flattened wire that has been slit to obtain square edges.

The relative ease with which various alloys may be formed by extruding, rolling, forging, etc.

A characteristic of liquid or powder coatings in an electrostatic application to seek out and adhere to parts of the substrate not in direct line of sight of the delivery system end point.

A condition in a coil due to insufficient tension which creates a small void between adjacent wraps.

A product that has been subjected to mechanical working by extruding, rolling, forging or other processes.

The stress at which a material exhibits a specified permanent set. The offset used for aluminum and its alloys is 0.2 percent of gauge length. For aluminum alloys the yield strengths in tension and compression are approximately equal.