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Contact UsAluminum Alloy Designations
The aluminum industry uses a four-digit index system for the designation of its wrought aluminum alloys.
As outlined below, the first digit indicates the alloy group according to the major alloying elements.
1xxx Series
In this group minimum aluminum content is 99% and there is no major alloying element. The second digit indicates modifications in impurity limits. If the second digit is zero, there is no special control on individual impurities. Digits 1 through 9, which are assigned consecutively as needed, indicate special control of one or more individual impurities. The last two digits indicate specific minimum aluminum content. Although the absolute minimum aluminum content in this group is 99%, the minimum for certain grades is higher than 99%, and the last two digits represent the hundredths of a per cent over 99. Thus, 1030 would indicate 99.30% minimum aluminum. without special control on individual impurities. The designations 1130, 1230, 1330, etc.. indicate the same purity with special control on one or more impurities. Likewise 1100 indicates minimum aluminum content of 99.00% with individual impurity control.
2xxx through 9xxx Series
The major alloying elements are indicated by the first digit, as follows:
2xxx Copper
3xxx Manganese
4xxx Silicon
5xxx Magnesium
6xxx Magnesium and silicon
7xxx Zinc
8xxx Other element
9xxx Unused series
The second digit indicates alloy modification. If the second digit is zero. it indicates the original alloy: digits 1 through 9, which are assigned consecutively, indicate alloy modifications. The last two digits have no special significance, serving only to identify the different alloys in the group.
Experimental Alloys
Experimental alloys are designated according to the four digit system, but they are prefixed by the letter X. The prefix is dropped when the alloy becomes standard. During development, and before they are designated as experimental, new alloys are identified by serial numbers assigned by their originators. Use of the serial number is discontinued when the X number is assigned.
Alloy | Application field | |
1xxx | 1050 |
Insulation, food industry, decoration , lamp, traffic signs etc. |
1060 |
Fan blade, Lamps and lanterns, Capacitor shell, Auto parts, Welding parts. |
|
1070 |
Capacitor, Rear panel of vehicle refrigerator , charging point, heat sink etc |
|
1100 |
Cooker, building material, printing, heat exchanger, bottle cap etc |
|
2xxx | 2A12 2024 |
Aircraft structures, rivets, aviation, machinery , missile components, the card wheel hub, propeller components, aerospace parts, car parts and various other structural parts. |
3xxx |
3003 3004 3005 3105 |
Aluminum curtain wall panel, aluminum Ceiling, Electric cooker bottom, TV LCD backboard, storage tank, curtain wall, building construction panel heat sink, billboard. Industrial floor, air conditioning, refrigerators radiators, Make-up board, Prefabricated house etc. |
5xxx | 5052 |
Marine and transportation material, railway carriage's inner and outer cabinet, oil and chemical industry storage device, equipment and medical device panel etc. |
5005 |
Marine applications, bodies of boats, buses, trucks and trailer. Curtain wall panel. |
|
5086 | Ship board, deck, bottom and edge panel etc. | |
5083 |
Tanker, oil storage tank, drilling platform, ship board, deck, bottom, welded parts and edge panel, railway carriage 's board, automotive and aircraft panel, cooling device and automotive molding etc. |
|
5182 | ||
5454 | ||
5754 |
Tanker body, marine facilities, pressure container, transportation etc. |
|
6xxx |
6061 6083 6082 |
Railway inside and outside parts, board and bed plate. Industry moldingHighly stressed applications includes Roofing construction,transportation, and marine as well as mould. |
6063 |
Auto parts, architectural fabrication, window and door frames, aluminum furniture, electronic components as well as various consumer durable products. |
|
7xxx | 7005 |
Truss, rod/bar and the container in transportation vehicles; Large-sized heat ex changers. |
7050 |
Molding (bottles) mode, ultrasonic plastic welding mold, golf head, shoe mold, paper and plastic molding, foam molding, lost wax mold, templates, fixtures, machinery and equipment. |
|
7075 |
Aerospace industry, military industry electronic etc. |
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