|
Anodizing |
Forming a coating on a metal surface
produced by electrochemical treatment through anodic
oxidation. This process may be used to increase the
protective effect of
aluminium's
transparent natural oxide surface. It may also be given
a decorative coloration. |
|
Bar |
A solid extrusion that is long in
relation to cross section, which is square or
rectangular (excluding plate or flattened wire) with
sharp or rounded corners or edges; or is a regular
hexagon or octagon; and in which at least one
perpendicular distance between parallel faces is 0.375
inch or greater. (Smaller sizes are classified as wire.) |
|
Billet |
Solid in form, commonly cylindrical,
charged into the extrusion press cylinder. It is usually
a cast product. |
|
Coating |
Continuous film on the surface of a
product. |
|
Die |
In extrusion process, a steel tool with
an opening through which heated aluminium billet is
forced by pressure, resulting in cross-sectional shape. |
|
Extrusion |
Process where aluminium billet is forced
through a die by pressure. |
|
Extruded Profile |
A product that is long in relation to its
cross-sectional dimensions, having a cross-section other
than those of wire, rod, bar and tube, produced by hot
extrusion. Formerly termed a shape. |
|
Stretching |
In extrusion: straightening an aluminium
profile by pulling to straighten the profile. An average
stretch increases the length by about one-half of one
percent. |
|
Solid Profile |
Any profile other than a hollow or semi
hollow. |
|
Semi hollow Profile |
An extruded profile, any part of whose
cross section partially encloses a void, the area of
which is substantially greater than the square of the
width of the gap. |
|
Tube |
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 except as affected by
corner radii. |
|
Temper |
The combination of hardness and strength
imparted to a metal by mechanical or thermal treatments
and characterized by certain metallurgical structures
and mechanical properties determining temper
designation. |
|
Tensile Strength |
In tensile testing, the ratio of maximum
load to original cross-sectional area. Also called
Ultimate Strength. |
|
Thermal Conductivity |
The ability of a material to transmit
heat through its bulk and, by direct contact, to other
substances. Aluminium is a good heat conductor and is
widely used in cookware and in radiators and other heat
exchangers. |
|
Tolerance |
Allowable deviation from a nominal or
specified dimension. |
|
Yield Strength |
The stress at which a material exhibits a
specified permanent set. The offset used for aluminium
and its alloys is 0.2 percent of gauge length. For
aluminium alloys, the yield strengths in tension and
compression are approximately equal. |
