Selecting Aluminium Alloys for anodising

The aluminium alloy chosen for anodising has a direct bearing on the quality of finish achieved. The difference between super-purity 99.99% and commercial quality 99% material in the anodised condition is easily seen. The table below is a general guide to alloys produced to EN 573, and in common use.

Alloy Clear protective Anodising Anodising & Dye Bright Anodising
1080 E E E
1200 VG VG VG
2000 SERIES M M U
3000 SERIES G G M
4043 G D U
5005 E VG G
5056
5083
G G M
5154
5251
5454
VG VG G
6061 VG G M
6063 E VG G
6082 G G M
6463 VG VG VG
7020 G G M