Analysis of Common Grades of 1-8 Series Aluminum Alloys

Analysis of Common Grades of 1-8 Series Aluminum Alloys

Aluminum Alloy Naming Rules

First digit

The main alloy element codes have the following meanings:

1: pure aluminum, aluminum content not less than 99.00%

2: Cu (copper)

3: Mn (manganese)

4: Si (silicon)

5: Mg (magnesium)

6: Mg+Si (magnesium+silicon)

7: Zn (zinc)

8: other elements

9: spare group

Second digit

Indicates the control of the limit content of alloying elements or impurities:

0: Indicates that there is no special control on the limit content of impurities;

1-9: Indicates that there is special control on the limit content of one or more single impurities or alloying elements.

The third and fourth digits

Pure aluminum (the first digit of the grade is 1): indicates the two decimal places after the minimum aluminum percentage, such as 1050 aluminum content is 99.50%; Other alloys (the first digit of the grade is 2~9): The two digits have no special meaning and are only used to identify different alloys in the same group. The second digit indicates the modification. If the second digit is 0, it means the original alloy; if it is 1-9, it means the modified alloy.

The fifth letter

Basic state code (GB/T16475-1996)

F: Free processing state, applicable to products with no mechanical property requirements during the forming process

O: Annealed state, may be suffixed with one Arabic numeral other than 0

H: Work hardening state, applicable to products with improved strength through work hardening (this product can reduce some strength through heat treatment), often suffixed with more than two Arabic numerals

W: Solution heat treatment state (an unstable state), only applicable to alloys naturally aged at room temperature after solution heat treatment, such as W1/2 hours

T: Stable state produced after heat treatment (different from F, O and H states), applicable to products produced by heat treatment (this product can also be work hardened), the letter T is always suffixed with more than one Arabic numeral, the first digit indicates the basic type of heat treatment (from 1 to 10), and the subsequent digits indicate changes in the details of the heat treatment.

Usually, the international grade aluminum alloy name consists of four digits plus a status code (a letter plus several numbers). For example: 6 0 6 1–T 6 5 1

Heat treatment states and representative numbers

T1—Cool from forming temperature and naturally age to a generally stable state.

T2—Annealed state (for castings only).

T3—Natural aging after solution treatment

T4—Natural aging after solution treatment.

T5—Artificial aging after cooling from forming temperature. .

T6—Artificial aging after solution treatment.

T7—Stabilization after solution treatment. Improve dimensional stability, reduce residual stress, and improve corrosion resistance. T8—Artificial aging after solution treatment and cold working.

T9—Artificial aging and cold working after solution treatment.

T10—Cool from forming temperature, artificial aging and cold working.

T31—Natural aging after solution treatment and cold working (1%).

T36—Natural aging after solution treatment and cold working (6%).

T37—Natural aging after solution treatment and cold working (7%), for 2219 alloy. T41—Boiling water quenching after solution treatment.

T411—Air cooling to room temperature after solution treatment, hardness between O and T6, low residual stress.

T42—Natural aging after solution treatment. Processed by the user, suitable for 2024 alloy, slightly lower strength than T4.

T61—T41+artificial aging.

Heat treatment states and representative numbers

T611—solid solution treatment, boiling water quenching.

T62—Artificial aging after solution treatment. T72—Overaging after solution treatment.

T73—Graded aging after solid solution treatment, the strength is lower than T6, and the corrosion resistance is significantly improved.
T76—Graded aging after solution treatment.

T81—cold work after solution treatment and artificial aging. In order to improve the deformation and strength after solution treatment.

T86—Solution treatment followed by cold work (6%), artificial aging.

T87—T37+artificial aging.

Tx51 - Stretching treatment to eliminate residual stress after solution treatment.

Tx52—Compression deformation is performed to eliminate the residual stress after solution treatment. After solution treatment, 2.5% plastic deformation is performed and then aged, such as T352 and T652.
Tx53—Thermal stress relief.

Tx54—Compression deformation is performed to eliminate residual stress after solution treatment of precision forgings.

Note:

X stands for 3, 4, 6 or 8, for example, T351, T451, T651, T851, suitable for plates, drawn bars, wires, and aged without any correction after stretching to eliminate stress. T3510, T4510, T8510, suitable for extruded profiles, and corrected to make the straightness meet the tolerance after stretching to eliminate stress, and aged.

0.5~3% permanent deformation for plates, 1~3% permanent deformation for bars and profiles.

1-8 series Common Brands

1000 Series：1060、1050、1235、1100、1070

3000 Series：3003、3004、3150、3102

5000 Series：5005、5052、5050、5056、5083、5754、5182、5154、5252、5254、5A02、5A03、5A05、5A06

6000 Series：6061、6010、6063、6009

7000 Series：7075、7005、7072

8000 Series：8011、8079

Xienuo Aluminum can produce 1-8 series aluminum plates with thickness of 0.2mm-600mm and width of 80mm-2500mm, undertake orders of 3-500 tons, and export to the world.