For different applications, different aluminum sheet properties are needed like strength, corrosion resistance, decoration, and workability. If it is difficult to satisfy all the items and it is not necessary, it is recommended to decide on the priority.
1. General purpose
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% of Cu (copper) is added to 1100 aluminum sheet, so it is more advantageous than 1200 in terms of strength.
2. Strength
The common strength reference standard is
Pure aluminum (1000 alloy) <Al-Mn (3000 alloy)<Al-Mg (5000 alloy)<Al-Mg-Si (6000 alloy)<Al-Cu (2000 alloy)< Al-Zn-Mg (7000 alloy).
The corresponding representative alloy grades are as follow
Al-Mn alloy: 3003, 3004
Al-Mg alloy: 5052, 5083
Al-Mg-Si alloy: 6063, 6061, 6005
Al-Cu alloy: 2014, 2017, 2024
Al-Zn-Mgalloy: 7003, 7204, 7075, 7050, 7055 aluminum alloy
The tensile strength of aluminum alloys ranges from 60MPa (1080-O alumiium) to 90MPa (7075-T6). For structures with welding as the main body, please consider 5083 aluminum sheet. When higher weld strength is required, consider 7204 or 7003.
When there is no corrosion resistance problem or complete anti-corrosion treatment is done, 2014-T6, 2017-T3, 2024-T4, 7075-T6 materials can be selected. Compared with 7150-T77, the stress corrosion resistance of 7055-T77 is almost same, but the strength is greatly improved, which is the highest strength among the current aircraft aluminum alloys.
3. Corrosion resistance
Corrosion resistance will vary greatly depending on the use environment. For medicine and food containers, please consider 1100 and 1200 aluminum alloy. When higher corrosion resistance is required, consider higher purity aluminum such as 1070 and 1080. In terms of water resistance, 3003 aluminum shet is used for fresh water, and 5052 or 5083 aluminum plate is used for sea water. Al-Cu and Al-Zn-Mg alloys cause stress corrosion cracking depending on the conditions of use.
4. Processability
Extrusions such as beer cans generally use 1100, 3003, and 3004.
Among common cutting materials, 2011 has excellent machinability, but poor corrosion resistance.
5. Weldability
For MIG and TIG welding, pure aluminum, Al-Mn, Al-Mg and and Cu-free has excellent weldng performance. When the strength after welding is emphasized, 7204 and 7003 should be selected, and when the corrosion resistance is valued, 5083 should be used.
The strength of Al-Mg-Si alloys decreases after welding. 6063 aluminum alloy is a heat-treatable strengthening alloy with medium strength in the AL-Mg-Si series. What are 6063 t6 aluminum properties? It has good corrosion resistance, excellent weldability, good cold workability, and moderate strength.
Original Source:https://www.aircraftaluminium.com/a/how-to-choose-aircraft-aluminum-sheet-for-sale.html
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