Frequently asked questions
Short, clear answers about extrusion, alloys, surface finishes and the quote process.
What is aluminium extrusion?
Aluminium extrusion is a forming process in which a heated aluminium billet (a cylindrical log) is pushed under high pressure through a shaped die to create a profile with a constant cross-section. The die opening defines the cross-section; the profile is then cooled, stretched, cut to length and, if required, aged.
What is a billet?
A billet is the heated, cylindrical aluminium log of a specific alloy that is loaded into the extrusion press. The alloy of the profile is set by the alloy of the billet; the most common alloys are EN AW-6060 and EN AW-6063.
What is the difference between 6060 and 6063 alloy?
Both belong to the Mg-Si (6xxx) family and suit anodizing and painting. 6060 extrudes easily in thin walls and detailed sections and is used for general purposes; 6063 is known for surface appearance in architectural profiles. The choice depends on the section, surface treatment and required mechanical values, and is confirmed in the quote.
How is profile weight calculated?
Kilograms per metre = cross-section area (mm²) × 0.0027, using a density of about 2.70 g/cm³. Example: a 40×40×2 mm box section has an area of 304 mm² and weighs about 0.82 kg/m. The calculator on this site does it automatically; section tolerances can cause small differences in real weight.
What is the difference between anodizing and powder coating?
Anodizing grows an oxide layer electrochemically on the aluminium surface (EN 12373); it keeps the metallic look and is integral with the surface. Powder coating is a polymer coating applied and baked on the surface, offering a wide colour (RAL) range. The choice depends on the environment and the desired appearance.
Is a die needed for a custom profile?
Yes. Any section not in a standard catalogue needs a die made for that section. If you share a drawing (DWG, DXF, STEP or PDF), alloy, surface finish, length and estimated quantity in your quote request, the die and production plan can be defined.
What information is needed for a quote?
A drawing or dimensions, alloy and temper (if known), surface finish, cut length, estimated quantity (kg, pieces or tonnes), application and delivery location. Incomplete requests are also reviewed; the quote form guides you through the missing items.
What is the minimum order quantity?
The minimum quantity depends on the section, alloy, surface finish and die status. We do not publish a fixed figure; state your quantity in the quote request and the terms are confirmed in writing.