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|See “Mark, Traffic.”
|An aging process which results in increased strength and hardness.
|Spontaneous decrease of strength and hardness that takes place at room temperature in certain strain hardened alloys containing magnesium.
|Precipitation from solid solution resulting in a change in properties of an alloy, usually occurring slowly at room temperature (natural aging) and more rapidly at elevated temperatures (artificial aging).
|An aluminum or aluminum-alloy coating that is metallurgically bonded to either one or both surfaces of an aluminum alloy product, and that is anodic to the alloy to which it is bonded, thus electrolytically protecting the core alloy against corrosion. For
|A substance having metallic properties and composed of two or more elements of which at least one is an elemental metal.
|Aerospace Material Specification.
|Conformity to, or deviation from, specified angular dimensions in the cross section of a shape or bar.
|The deliberate departure from a horizontal passline on the entry side of a rolling mill used for one-side bright rolling.
|A thermal treatment to soften metal by removal of stress resulting from cold working or by coalescing precipitates from solid solution.
|Thermal treatment (H2X temper nomenclature) given cold worked metal to reduce strength and increase ductility to controlled levels other than annealed temper.
|Forming a coating on a metal surface produced by electrochemical treatment through anodic oxidation.
|See “Sheet, Anodizing.”
|American National Standards Institute.
|See “Buckle, Arbor.”
|See “Mark, Arbor.”
|American Society of Mechanical Engineers.
|American Society for Testing and Materials.
|American Welding Society.
|Back End Condition
|A condition occurring in the last metal to be extruded. It is a result of the oxidized surface of the billet feeding into the extrusion.
|Non-grooved rolls which stiffen or strengthen work rolls.
|A solid wrought product that is long in relation to its cross section which is square or rectangular (excluding plate and flattened wire) with sharp or rounded corners or edges, or is a regular hexagon or octagon, and in which at least one perpendicular d
|Bar brought to final dimensions by cold work to obtain improved surface finish and dimensional tolerances.
|Bar, Cold-Finished Extruded
|cold-finished bar produced from extruded bar.
|Bar, Cold-Finished Rolled
|cold-finished bar produced from rolled bar.
|Bar brought to final dimensions by hot extruding.
|Bar brought to final dimensions by hot rolling.
|Bar brought to final thickness by hot or cold rolling and to final width by sawing.
|An agreed-upon unit of area used primarily in packaging applications. One common base box for aluminum is 31,360 square inches, originally composed of 112 rectangular sheets each 14 by 20 inches.
|See “Edge, Belled.”
|A loose center buckle extending to near the edges of a sheet.
|A hot worked semi-finished product suitable for subsequent working by such methods as rolling, forging, extruding, etc.
|A piece of metal cut or formed to regular or irregular shape for subsequent processing such as by forming, bending or drawing. The piece of sheet stock cut out by blanking die. It will subsequently be drawn into a cup or end shell.
|A raised area on the surface of a extruded product due to subsurface gas expansion. This can occur during extrusion or thermal treatment.
|A raised spot on only one surface of the metal whose origin is between the cladding and core in clad products.
|A blister in the coating of an alclad or a clad product.
|A raised spot (one or both sides) on rolled metal.
|See “Scratch, Tension.”
|A semifinished hot rolled product, rectangular or square in cross section, produced on a blooming mill.
|A blister that has ruptured and may produce a void. See also “Blister.”
|A knoblike projection on the main body of a forging or casting.
|Taper or slope in the bottom of a forged depression to assist the flow of metal toward the sides of the depressed area.
|Longitudinal curvature of rod, bar, profiles (shapes), and tube. Bow is measured after allowing the weight of the extrusion to minimize the deviation. Bow can be caused by a non-uniform extrusion rate across the cross section resulting in one portion of the extrusion being longer than the other or non-uniform contraction during quenching.
|Deviation from straight of a longitudinal edge.
|Curvature in the plane of sheet or plate in the rolling direction.
|Curvature across the rolling direction of sheet or plate.
|Joining metals by fusion of nonferrous alloys that have melting points above 425C (800F) but lower than those of the metals being joined. This may be accomplished by means of a torch (torch brazing), in a furnace (furnace brazing), or by dipping in a molten flux bath (dip or flux brazing).
|A rolled, extruded, or casr round filler metal for use in joining by brazing.
|Sheet of a brazing alloy, or sheet clad with a brazing alloy on one or both sides.
|Wire for use as a filler metal in joining by brazing.
|See “Sheet, (1SBMF), (S2SBF).”
|See “Mark, Bristle.”
|A deviation from the desired cross section due to the absence of a certain portion of the die used to extrude the profile (shape).
|See “Edge, Broken.”
|Broken Matte Finish
|Non-uniform surface on the inside of packed rolled foil (Bright Spots).
|see “Mark, Roll Bruise.”
|A distortion of the surface of the metal.
|Undulation (wavy region) in the center of the metal.
|Undulation (wavy region) along the edge(s) of the metal.
|Buckle, Oil Can
|See “Buckle, Trapped.”
|Undulation (wavy region) which is smaller sized and often circular in shape.
|A mechanical finishing operation in which fine abrasives are applied to a metal surface by rotating fabric wheels for the purpose of developing a lustrous finish.
|see “Streak, Bumish.”
|A thin ridge ofroughness left by a cutting operation such as slitting, trimming, shearing, blanking or sawing.
|See “Bow, Lateral.”
|See “Dent, Repeating.”
|Metal sheared from a vertical surface of a die forging, which is spread by the die over an adjoining horizontal surface.
|A lug or boss added to a forging so that “on center” machining and forming may be performed with one set up or checking. This lug is finally machined or cut away.
|see “Scratch, Tension.”
|A circular blank fabricated from plate, sheet or foil.
|See “Sheet, Clad.”
|Continuous film on the surface of a product.
|See “Line, Luders.”
|Longitudinal non-uniform coating thickness caused by uneven application of the liquid coating.
|This term is not recommended. The term “Sheet” is preferred.
|see “Streak, Structural.”
|A defect caused when one face of a forging is sucked in to fill a projection on the opposite side.
|Minute surface cracks on rolled products which can be caused by insufficient ingot scalping.
|see “Mark, Roll Bruise.”
|A series of surface cracks perpendicular to the extruding direction. Speed tearing normally occurs in corner radii or extremities of a section and is caused by localized high temperature.
|Lateral stacking, primariy in one direction, of wraps in a coil so that the edges of the coil are conical rather than flat Improper alignment of rolls over which the metal passes before rewinding is a typical cause. See also “Oscillation.”
|The condition produced by either mechanical or thermal treatment, or both, and characterized by a certain structure and mechanical properties.
|In tensile testing, the ratio of maximum load to original cross-sectional area. Also called “Ultimate Strength.”
|See “Scratch, Tension.”
|Allowable deviation from a nominal or specified dimension.
|A term usually referring to the dies, mandrels, etc., used in the production of extruded or drawn shapes or tube.
|See “Chucking Lug.”
|A cast or rolled product of rectangular cross section of thickness 0.250 inch or greater, and with edges either as-cast, sheared or sawed, with internal stress levels controlled to achieve maximum stability for machining purposes in tool and jig applicati
|A deep longitudinal rub mark resulting from abrasion by extrusion or drawing tools.
|Abrasion which results from relative movement between contacting metal surfaces during handling and transit. A dark color from the abrasively produced aluminum oxide is usually observed. A mirror image of a traffic mark is observed on the adjacent contact
|See “Bow, Transverse.”
|A direction perpendicular to the direction of working.
|sheet or plate having a raised figured pattern on one surface to provide improved traction.
|Edge trimming accidentally wound into a roll of foil.
|A hollow wrought product that is long in relation to its cross section, which is symmetrical and is round, a regular hexagon or octagon, elliptical, or square or rectangular with sharp or rounded corners, and that has uniform wall thickness.
|This term is not recommended. The term “Tube Stock” is preferred.
|A semi-finished tube suitable for the production of drawn tube.
|composite tube composed of an aluminum alloy core having on either the inside or outside surface a metallurgically bonded aluminum or aluminum alloy coating that is anodic to the core, thus electrolytically protecting the core against corrosion.
|Tube made from sheet or plate butt welded by either gas-tungsten or gas-metal arc-welding method, with or without the use of filler metal.
|A tube produced by forming and seam-brazing sheet.
|A welded tube, the seam of which is formed by positioning one edge of the sheet against the other for welding.
|A tube brought to final dimensions by cold drawing through a die. (Note: This product may be produced from either seamless or non-seamless extruded stock or from welded stock.)
|A tube the outside surface of which has been roll-embossed with a design in relief regularly repeated in a longitudinal direction.
|A tube formed by hot extruding. (Note: This product may be either seamless or non-seamless.)
|Tube which has integral fins or projections protruding from its outside surface.
|A tube of nominally uniform wall thickness having regular, longitudinal, concave corrugations with sharp cusps between corrugations.
|A tube for use in apparatus in which fluid inside the tube will be heated or cooled by huid outside the tube. The term usually is not applied to coiled tube or to tubes for use in refrigerators or radiators.
|A welded tube produced by winding the sheet to form a closed helix and joining the edges of the seam by welding.
|A welded tube the seam of which is formed by longitudinally lapping the edges of the sheet for welding.
|A tube produced by forming and mechanically lock-seaming sheet.
|A shape normally produced from sheet of nominally uniform wall thickness and approximately tubular form but having a longitudinal unjointed seam or gap of width not greater than 25 percent of the outside diameter or greatest over-all dimension. Also refer
|This term is not recommended. The term “Tube Stock” is preferred.
|A tube that does not contain any line junctures (metallurgicalwelds) resulting from the method of manufacture. (Note: This product may be produced by die and mandrel or by hot piercer processes.)
|A tube that, after extrusion, has been cold drawn a slight amount to minimize ovality.
|Tube, Stepped Drawn
|A drawn tube whose cross section changes abruptly in area at intervals along its length.
|Tube commonly used for structural purposes.
|A tube produced by forming and seam-welding sheet longitudinally.
|This term is not recommended. The term “tube” is preferred.
|A tube having certain standardized length and combinations of outside diameter and wall thickness thinner than that of “Rigid Conduit,” commonly designated by nominal electrical trade sizes, for use with compression-type fittings as a protection for elect
|A tubular product suitable for use as an electric conductor.
|(l) For rolled products, a winding departure from flatness. (2) For extrusions, a winding departure from straightness.
|A sharp color demarcation in the appearance of the metal due to a difference in the work roll coating.
|Ultimate Tensile Strength
|See “Tensile Strength.”
|A small protrusion on a forging resulting from the entrance of metal into a die vent hole.
|see “Corrosion, Water Stain.”
|See “Buckle, Edge.”
|(l) A single thickness offoil as it leaves the rolling mill. (2) A connecting element between ribs, flanges, or bosses on shapes and forgings.
|See “Seam, Extrusion.”
|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
|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.
|See “Mark, Whip.”
|See “Hair, Sliner.”
|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 face
|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 corro
|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.
|Wire produced by hot extruding.
|wire having two parallel flat surfaces and rounded edges produced by roll-flattening round wire.
|Wire, Flattened and Slit
|Flattened wire that has been slit to obtain square edges.
|see “Wire, Cold-Heading.”
|The relative ease with which various alloys may be formed by rolling, extruding, forging, etc.
|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 such processes as rolling, extruding, forging, etc.