Aluminum alloy selection method

Jan 22, 2024

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Please consider various properties such as strength, corrosion resistance, decoration, and processability. If it is difficult to satisfy all items and it is not necessary, we recommend that you decide on priorities and then discuss them.

1. General purpose pure aluminum material
Well-known pure aluminum plates such as 1100 and 1200 can be used for various purposes. The purity of both is above 99.00%.
About 0.1% Cu (copper) is added to 1100, so it is more advantageous than 1200 in terms of strength. The more copper is added, the worse the corrosion resistance will be.

2. Ways to value intensity
The general strength reference standard is
Pure aluminum (1000 type alloy)<Al-Mn type (3000 type alloy)<Al-Mg type (5000 type alloy)<Al-Mg-Si type (6000 type alloy)<Al-Cu type (2000 type alloy)< Al-Zn-Mg type (7000 type alloy).

The corresponding representative alloy types are as follows.

·Al-Mn type 3003, 3004
·Al-Mg type 5052, 5083
·Al-Mg-Si type 6063, 6061, 6005C
·Al-Cu type 2014, 2017, 2024
·Al-Zn-Mg type 7003, 7204, 7075, 7050
The tensile strength of aluminum alloy ranges from 60MPa (1080-O material) to 590MPa (7075-T6), which is a large range and can be selected according to the corresponding use.
For structures mainly made of welding, please first consider 5083 materials.
When higher weld strength is required, consider 7204 or 7003.
When there is no corrosion resistance problem or complete anti-corrosion treatment is required, 2014-T6, 2017-T3, 2024-T4, and 7075-T6 materials can be used.