The basic state code of the coated aluminum coil alloy:
F
Free machining state
It is suitable for products with special requirements for work hardening and heat treatment conditions during the forming process, and the mechanical properties of the products in this state are not specified (uncommon)
O
Annealed state
For processed products fully annealed for minimum strength (occasionally)
H
Work hardened state
It is suitable for products whose strength is increased by work hardening. After work hardening, the product may (or may not) undergo additional heat treatment to reduce the strength (generally non-heat treatment strengthening materials)
W
Solution heat treatment state
An unstable state, which is 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 states)
It is suitable for products stabilized with (or without) work hardening after heat treatment. The T code must be followed by one or more Arabic numerals (usually heat-treated reinforced materials)
The state code behind our common non-heat-treated reinforced aluminum alloys is generally the letter H plus two digits.
Such as 1100 H14.
The following briefly introduces the meaning of the following status codes.
The letter H is usually followed by two digits:
The first digit indicates the method of work hardening.
The first digit after H is: 1, 2, 3, 4
That is, H1* represents simple work hardening treatment
H2* means work hardening and incomplete annealing
H3* means work hardening and stabilization
H4* means work hardening and painting treatment
The second digit indicates the degree of hardening achieved by the material.
The second digits after H are: 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 super hard state
(There are not many cases where H is followed by three numbers, only a few. H111 means that a moderate amount of work hardening has been carried out after final annealing. H112 means products suitable for hot forming. H116 means 5* with magnesium content ≥ 4.0% **Products made of alloys.)
The state code behind our 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 the T indicates the heat treatment procedure for the product.
T0
After solution heat treatment, it is naturally aged and then cold worked.
For products that have been cold worked to increase their strength.
T1
It is cooled by the high temperature forming process and then naturally aged to a substantially stable state.
It is suitable for products that are not cold processed after being cooled by the high temperature forming process (can be straightened and leveled, but do not affect the limit of mechanical properties).
T2
It is cooled by the high temperature forming process, and then naturally aged to a basically stable state after cold working. It is suitable for cold working, or straightening, leveling to increase the strength of products after cooling by high temperature forming process.
T3
After solution heat treatment, cold working is performed, and then it is naturally aged to a substantially stable state. It is suitable for products that are cold worked, or straightened and leveled to increase strength after solution heat treatment.
T4
After solution heat treatment, it is naturally aged to a basically stable state. It is suitable for products that are not subjected to cold working after solution heat treatment (straightening and leveling can be performed, but the mechanical property limit is not affected).
T5
A state that is cooled by a high temperature forming process and then artificially aged.
It is suitable for products that are artificially aged after being cooled in the high temperature forming process without cold working (straightening and leveling can be carried out, but the mechanical performance limit is not affected).
T6
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 carried out, but the mechanical property limit will not be affected).
T7
The state of artificial aging after solution heat treatment.
It is suitable for products whose strength exceeds the highest peak point on the aging curve during artificial aging in order to obtain some important characteristics after solution heat treatment.
T8
After solution heat treatment, it is cold worked and then artificially aged.
It is suitable for products that have been cold worked, or straightened and leveled to increase the strength of the product.
T9
The state of artificial aging after solution heat treatment and then cold working.
Suitable for products that have been cold worked to increase product strength.
T10
After cooling from the high temperature forming process, it is cold worked and then artificially aged.
It is suitable for products that have been cold worked, or straightened and leveled to increase the strength of the product.
T state and TXXX state (except stress relief state)
Add an Arabic numeral after the TX status code (called TXX status), or add two Arabic numerals (called TXXX status), indicating that the specific product characteristics (such as mechanical properties, corrosion resistance, etc.) have been significantly changed. Process status.
T42
It is suitable for products whose natural aging reaches a fully stable state after solid solution heat treatment in O or F state, and also applies to products whose mechanical properties reach T42 state after heat treatment of processed products in any state by the buyer.
T62
It is suitable for products that enter artificial aging after solid solution heat treatment from O or F state, and also applies to products whose mechanical properties reach T62 state after heat treatment of processed products in any state by the buyer.
T73
It is suitable for products that have been aged to achieve the specified mechanical properties and stress corrosion resistance performance indicators after solution heat treatment.
T74
Same as T73 state definition. The tensile strength of this state is greater than that of the T73 state, but less than that of the T76 state.
T76
Same as T73 state definition. The tensile strength of this state is higher than that of T73 and T74 states, respectively, and the stress corrosion cracking resistance is lower than that of T73 and T74 states, respectively, but its resistance to spalling corrosion is still good.
T7X2
It is suitable for products whose mechanical properties and corrosion resistance have reached T7X state after artificial aging treatment after solid solution heat treatment from O or F state.
T81
It is suitable for products that are subjected to about 1% cold working deformation to increase the strength after solution heat treatment, and then artificially aged.
T87
It is suitable for products that are subjected to about 7% cold working deformation to increase the strength after solution heat treatment, and then artificially aged.
stress relief
Adding "51", or "510", or "511" or "52" or "54" after the above TX or TXX or TXXX status code indicates the product status code that has undergone stress relief treatment.
TX51
TXX51
TXXX51
It is suitable for thick plates, rolled or cold-finished bars, and die forgings, forged rings or rolled rings that are drawn to a specified amount after solution heat treatment or cooling from a high temperature forming process. Straighten.
The permanent deformation of thick plate is 1.5%~3%; the permanent deformation of rolled or cold-finished bar is 1%~3%; the permanent deformation of die forging ring or rolled ring is 1%~5% .
TX510
TXX510
TXXX510
It is suitable for extruded rods, shapes and tubes that are stretched to specified amounts after solution heat treatment or cooling from high temperature forming processes, as well as drawn tubes that are stretched without straightening.
The permanent deformation of extruded rods, shapes and pipes is 1% to 3%; the permanent deformation of drawn pipes is 1.5% to 3%.
TX511
TXX511
TXXX511
Suitable for extruded rods, shapes and tubes drawn to specified amounts after solution heat treatment or cooling from high temperature forming processes, as well as drawn tubes, these products can be slightly straightened after drawing to meet standard tolerances.
The permanent deformation of extruded rods, shapes and pipes is 1% to 3%; the permanent deformation of drawn pipes is 1.5% to 3%.
TX52
TXX52
TXXX52
It is suitable for solution heat treatment or after cooling from high temperature forming process, to relieve stress through compression to produce 1%~5% permanent deformation products.
TX54
TXX54
TXXX54
Suitable for die forgings where stress is relieved by cold shaping in the final forging die.
T6, solution treatment (quenching), artificial aging
T62, solution treated by annealing or F temper, artificially aged
T61 is a special heat treatment state that requires lower strength than T6.