Aluminum Tube 6000 Series

The 6-series aluminum alloy is an aluminum alloy with magnesium and silicon as the main alloying elements and Mg2Si phase as the strengthening phase, which belongs to the aluminum alloy that can be strengthened by heat treatment. The alloy has the advantages of medium strength, high corrosion resistance, no tendency of stress corrosion cracking, good welding performance, constant corrosion performance of welding zone, good forming ability and process performance.

When the alloy contains chemical copper, the strength of the alloy can be close to that of the 2-series aluminum alloy, and the process performance is better than that of the 2-series aluminum alloy, but the corrosion resistance becomes worse, and the alloy has good forging performance. Among the 6 series alloys, 6061 and 6063 alloys are the most widely used, which have the best comprehensive properties. The main products are extruded profiles, which are the best extruded alloys widely used as building profiles.

In addition to being widely used as structural and decorative materials for building doors, windows, and curtain walls, it is also widely used as indoor furniture, toilets, radiators, elevator handrail profiles, and general industrial pipes and rods.

F: Free processing state is suitable for products with special requirements for work hardening and heat treatment conditions during the forming process. The mechanical properties of products in this state are not specified (uncommon)

O: Annealed state Applicable to processed products that have been fully annealed to obtain the lowest strength (occasionally appear)

H: Work hardening state It is suitable for products whose strength is increased through work hardening. After work hardening, the product can undergo (or not) additional heat treatment to reduce the strength (generally non-heat treatment strengthened materials)

W Solid solution heat treatment state An unstable state, only applicable to alloys that are naturally aged at room temperature after solution heat treatment, this state code only indicates that the product is in the natural aging stage (uncommon)

T heat treatment state (different from F, O, H state) is suitable for products that have been stabilized after heat treatment (or not) through work hardening. The T code must be followed by one or more Arabic numerals (usually for heat treatment strengthened materials). The state code behind our common non-heat treatment strengthened aluminum alloy is generally the letter H plus two digits.

Such as 1100 H14. The following briefly introduces the meanings of the following status codes.

The letter H is usually followed by two numbers: the first number indicates the method of work hardening. The first digit after H is: 1, 2, 3, 4

That is, H1* H1* means simple work hardening treatment

H2* H2* indicates work hardening and incomplete annealing

H3* H3* indicates work hardening and stabilization

H4* H4* indicates work hardening and painting treatment

The second digit indicates the degree of hardening the material has achieved.

The second digit after H is: 1, 2, 3, 4, 5, 6, 7, 8, 9

Both H*1 hardness between 0 and 2

H*2 1/4 hard

H*3 Hardness between 2 and 4

H*4 1/2 Hard H*5 Hardness between 4 and 6

H*6 3/4 hard H*7 Hardness between 6 and 8

H*8 full hard state H*9 extra hard state

The state code behind common heat-treated aluminum alloys is generally the letter T plus one or more Arabic numerals to indicate the subdivision state of T. Add 0-10 Arabic numerals after T to indicate the subdivision state (called TX state). The number after T indicates the heat treatment procedure for the product. T0 After solution heat treatment, natural aging and then cold working. Suitable for products that have been cold-worked to increase strength.

T1 is cooled by a high temperature forming process and then naturally aged to a substantially stable state. It is suitable for products that are not subjected to cold processing (straightening and leveling, but does not affect the limit of mechanical properties) after being cooled by the high-temperature forming process.

T2 is cooled by the high-temperature forming process, and naturally aged to a basically stable state after cold working. It is suitable for products that are cooled by high temperature forming process, and then cold processed, or straightened and flattened to improve the strength.

T3 Cold working after solution heat treatment, and then natural aging to a basically stable state. It is suitable for products that undergo cold working, or straightening and leveling to improve strength after solution heat treatment.

T4 Naturally aged to a substantially stable state after solution heat treatment. It is suitable for products that do not undergo cold working after solution heat treatment (straightening and leveling can be performed, but do not affect the limit of mechanical properties), and then natural aging products.

T5 Cooled by a high temperature forming process and then artificially aged. It is suitable for products that are cooled by the high-temperature forming process without cold processing (straightening and leveling can be performed, but the limit of mechanical properties is not affected), and then artificially aged.

T6 is the state of artificial aging after solution heat treatment. It is suitable for products that are not subjected to cold working after solution heat treatment (straightening and leveling can be performed, but does not affect the limit of mechanical properties), and then artificially aged.