Glossary
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Glossary

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Term Definition
Rod, Redraw
Coiled rod of a quality suitable for drawing into wire.
Roll Mark
A raised area formed during rolling by the imprint of a depression in a roll.
Rolled Ring
A cylindrical product of relatively short height circumferentially rolled from a hollow section.
Rolling Slab
A rectangular semifinished product, produced by hot rolling fabricating ingot and suitable for further rolling.
Rub Mark
A minor form of scratching consisting of a large number of very fine scratches or abrasions.
Scalping
Mechanical removal of the surface layer from a fabricating ingot or semifinished wrought product so that surface imperfections will not be worked into the finished product.
Scratch
A sharp linear indentation in the surface of the metal.
Screw Machine Stock
Bar, rod, and wire in certain standard alloys, tempers, sizes and shapes suitable for automatic screw machine applications.
Shape
A section produced by such methods as extruding, rolling, drawing, etc., that is long in relation to its cross-sectional dimensions and has a cross section other than that of sheet, plate, rod, bar, tube or wire.
Shear Strength
The maximum stress which the material is capable of sustaining in shear.
Sheet
A rolled rectangular section of thickness 0.006 through 0.249 inch with sheared, slit or sawed edges.
Solution Heat Treating
Heating an alloy at a suitable temperature for sufficient time to allow soluble constituents to enter into solid solution where they are retained in a super-saturated state after quenching.
Squareness
Characteristic of having adjacent sides or planes meeting at 90 degrees.
Stabilizing
A thermal treatment to reduce internal stresses in order to promote dimensional and mechanical property stability.
Strain

Strain Hardening
Modification of a metal structure by cold working resulting in an increase in strength and hardness with loss of ductility.
Stress

Stress Relieving
Non-Hardening process that consists of heating a component to a suitable temperature (below austenising temperature) and once fully heated slow cooled without quenching similar to annealing. This process is primarily used to remove residual stress in manufactured components.
Tolerance

Tool
A term usually referring to the dies, mandrels, etc., used in the production of extruded or drawn shapes or tube.
Tooling Plate
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 applications.
Torn Surface
A deep longitudinal rub mark resulting from abrasion by extrusion or drawing tools.
Traffic Marks
Abrasions resulting from relative movement between contacting metal surfaces during transit. These abrasions are usually dark in appearance due to the presence of aluminum and aluminum oxide fines produced by the abrasive action.
Transverse Bow
Curvature across the width of sheet or foil.
Tube
A hollow wrought product that is long in relation to its cross section which is symmetrical and is round, square, rectangular, hexagonal, octagonal, or elliptical, with sharp or rounded corners, and having uniform wall thickness except as affected by corner radii.
Ultimate Tensile Strength
The maximum stress which a material is capable of sus. taming in tension under a gradual and uniformly applied load.
Unified Numbering System

Water Stain
Superficial surface oxidation due to the reaction of water films held between closely adjacent metal surfaces such as between wraps of coil or sheets in a stack. The appearance varies from-iridescent in mild cases to white, gray, or black in more severe instances.
Wire
A solid section long in relation to its cross-sectional dimensions, having a symmetrical cross section that is square or rectangular (excluding flattened wire) with sharp or rounded corners or edges, or is roimd, hexagonal or octagonal, and whose diameter, width, or greatest distance between parallel faces is less than an inch.
Workability
The relative ease with which various alloys may be formed by rolling, extruding, forging, etc.
Wrought Product
A product which has been subjected to mechanical working by such processes as rolling, extruding, forging, etc.
Yield Strength
The stress at which a material exhibits a specified permanent set. The value of set used for aluminum and its alloys is 0.002 inch per inch (0.2 percent). For aluminum alloys theyield strengths in tension and compression are appropriately equal.
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