6063 is our primary enclosure alloy thanks to its extrusion quality and surface finish; we also run 6061, 6060, 6005 and 6082 for higher-strength or structural parts, with T5 and T6 tempers available.
Alloy choice is a trade-off between how well a section extrudes, how it accepts a finish, and how strong it ends up:
| Alloy | Why we use it | Typical tempers |
|---|---|---|
| 6063 | Best surface quality and anodising response — our default for enclosures | T5, T6 |
| 6061 | Higher strength for structural and load-bearing parts | T6 |
| 6060 | Thin-wall and complex hollow sections | T5, T6 |
| 6005 / 6082 | Structural, transport and machinery frames | T6 |
For enclosures specifically, 6063-T5 is almost always the right answer. It extrudes into thin and complex sections cleanly, takes an even anodised colour, and is strong enough for a housing that is not carrying structural load. Where your part is structural — a robot joint shell, a load-bearing bracket, a rack frame — we will usually propose 6061-T6 instead and explain the cost difference.
We use primary billet from state-owned mills, not recycled scrap feedstock, ceramic-filtered and degassed on-line. This is the single biggest driver of surface quality: recycled feedstock is where sand holes, black streaks and weld lines come from, and those defects only become visible after anodising, when it is too late to fix them.
Mill certificates for the billet are available with each production batch on request.
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