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Anodising

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I was wondering which of the common aluminium alloys produces the best anodised finish.

Thanks.
 
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I've had good results with 2024 Alclad, 6061T6,and 7075.
The finish of the part is the most important aspect.
I'f you like black for a color then 40 series like 4043is
what you'll get. Something to remember if your welding useing 4043 filler rod.
 
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Normally the anodising for architectural uses is 6063 T5. And it is the most available for an extrusion producer.

The structural alloys like 6061, 6261 and others don´t produce an even finishing.

Each alloys has its own colour, inside the 6063 you can find a lot of sub-alloys depending the use and the fabricator. The most of these specs are related with obtain an even colour or protecting the anodising baths of contamination.

JKP
 
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