How do you tell cast aluminium from extruded aluminium?
Short answer: Cast aluminium usually looks thicker and rougher with visible mould marks, seams or fine pores, and often has a duller grey finish, while extruded aluminium has a constant profile along its length, a smoother surface and clean cut ends, and a simple bend test or a look at the cross-section usually tells you which you have.
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List Free →Look at the shape
Extruded items have the same profile along their length, such as a frame section or a tube, whereas cast items have varying thickness and complex shapes.
Check the surface
Cast parts often show sand marks, seams and a rougher texture, while extruded parts are smoother.
When you are unsure
A buyer can identify the grade immediately, so describing the item or sending a photo avoids guessing.
How ScrapTrade Fits In
ScrapTrade buyers can identify types from photos, so you do not need to be certain to get a quote.
A little sorting goes a long way with aluminium. ScrapTrade connects you with verified buyers, transparent weighing and escrow-protected payments.
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