Alloy
A substance with metallic properties, composed of two or more chemical elements of which at least one is metal. More specifically, aluminum plus one or more other elements, produced to have certain specific, desirable character characteristics.

Aluminum Plate
A flat-rolled product, rectangular in cross section, of thickness not less than 0.250" and with sheared or sawed edges.

Aluminum Sheet
A rolled product, flat or coiled, rectangular in cross section, with a thickness of less than 0.250" but not less than 0.006" and with slit, sheared or sawed edges.

Anodizing
An electrochemical process for applying a protective or decorative coating to metal surfaces.

Class I Anodize
Highest level of exterior durability with a minimum coating thickness of 0.7 mil (18 u).

Class II Anodize
Good level of exterior durability with a minimum coating thickness of 0.4 mil (10 u).

Clear 201
Minimum coating thickness of 0.2 mil (5 u).

Clear 202
Minimum coating thickness of 0.3 mil (7 u).

Clear Anodize
The original sulfuric acid anodizing process. Available in coating thickness up to 1.0 mil although 0.7 mil is the thickest used in normal commercial service. Natural aluminum silver color. Usually etched for matte appearance.

Duranodic (discontinued by SAF)
An anodizing process based on the use of an organic acid in combination with sulfuric acid which produces a range of bronze colors from champagne to dark bronze to black. On certain alloys, this process produces shades of gray. In this bath, the color is produced as the anodizing takes place. This process was widely used until about 1980 when it was largely displaced by the Two-Step process. It also was marketed under tradename Kalcolor. It is generally a harder finish than two-step and is often used today where abrasion resistance is important such as handrails.

Extrusion
The process of shaping material by forcing it to flow through a shaped opening in a die.

Fabricate
To work a material into a finished state by machining, forming or joining.

London Metals Exchange(LME)
The international trading body that facilitates the worldwide open market buying and selling of metals.

Metric ton (mt)
A unit of mass and weight equal to 1,000 kilograms, or 2,204.6 pounds.

Pattern
A mechanically embossed pattern in sheet. We offer pattern 10 which is a fluted pattern. We also offer pattern E5 which is a stucco pattern.

PVDF
PolyVinylidene Flouride. This a a polymer developed in the 1960's which is unusually resistant to UV radiation from the sun. Paints with this resin have an expected life (note: this is not a warranty) of over 20 years. These paints are available in both a spray and coil coated formulation. PVDF is manufactured by two firms. Arkema Inc. makes a resin called Kynar 500 and Solvay Solexis makes a resin called Hylar 5000. These resins are formulated into paint by approved licensees - PPG (Duranar), Valspar (Fluropon), Morton (Fluroceram), Akzo Nobel (Trinar). All of these manufacturers jealously guard their tradenames, so be careful how you use them. The most generic specification would be for paint formulated with PVDF.

Tape
2-3 mil polyethylene protective tape applied to sheet products for protection during fabrication. This material must be peeled off before final installation.

Two-Step
An anodizing process based on sulfuric acid anodizing in which a bronze tone color is created by deposition of salts of tin, nickel, or cobalt as a second step (therefore the name two-step) after anodizing. Generally these colors are bronze in shade, although in 1993 a process for using two-step technology and interference coloring, was introduced which produced a blue color. Since this is based on sulfuric acid anodizing, it is not as abrasion resistant as the Duranodic process mentioned elsewhere in this glossary.