Luminum

Comparative Characteristics Of Aluminum Alloys



The table below provides a general comparison of key characteristics of various aluminum alloys.

For each characteristic, we have provided ratings, with A the best and, depending on the characteristic, C, D or E the least attractive.

Notes below the table provide additional information about the way the ratings were developed.

Click on any alloy number for a list of products made from that alloy.


  Corrosion
Resistance
Mechanical
Fabrication
Welding
Characteristics
General Stress
Corrosion
Cracking
Weld-
ability
(cold)
Machin-
ability
Braz-
ability
Gas Arc Resist
Spot &
Seam
1100-O A A A E A A A B
1100-H14 A A A D A A A A
2011-T3 D D C A D D D D
2024-O - - - D D D D B
2024-T3 D C C B D C B B
2024-T351 D C C B D C B B
3003-H14 A A B D A A A A
3003-H22 A A B D A A A A
5005-H34 A A B D B A A A
5052-O A A B D B A A A
5052-H32 A A B D B A A A
5086-H116 A B B D D C A A
5086-H32 A B B D D C A A
5086-H34 A B B C D C A A
6061-O B A A D A A A B
6061-T4 B B B C A A A A
6061-T6 B A C C A A A A
6061-T651 B A C C A A A A
6061-T6511 B A C C A A A A
6063-T52 - - B C A A A A
7050-T7451 C B D B D D D B
7075-O - - - D D D D B
7075-T6 C C D B D D D B
7075-T651 C C D B D D D B
7075-T7351 C B D B D D D B
Notes:
Ratings reflect merit.  Alloys rated A have the best characteristics.
Corrosion resistance:  Ratings A and B indicate alloys that can be used in industrial and seacoast atmosphere without protection.  Alloys rated C, D and E should be protected on faying surfaces.
Stress corrosion cracking:  Based on experience and lab tests, alloys rated A show no known instance of failure, alloys rated B have not failed in service but were observed to suffer limited failures in lab tests, while alloys rated C suffered service failures under sustained stress transfers to grain as well as lab failures.
Weldability and brazability:  An A rating designates alloys that are generally weldable by all commercial procedures and methods.  B designates alloys that are weldable with special techniques; we recommend you test the alloy before committing to a process.  C designates alloys with limited weldability because of increased susceptibility to cracking, loss of resistance to corrosion and other undesirable mechanical changes.  D designates alloys for which there are no widely used techniques to produce successful welds.

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