The basic state of aluminium alloys is divided into 5 types, and we are going to give a detailed introduction to the code name description and application.
F Free-working state
This state is suitable for products with no special requirements for work-hardening and heat treatment conditions during the forming process, the mechanical properties of products in this state are not specified.
O Annealed state
This state is suitable for products that have been fully annealed to obtain a minimum strength.
H Work-hardened state
This state is suitable for products with increased strength through work-hardening, which may or may not be followed by an additional heat treatment that reduces strength.
W Solid melt heat treatment state (an unstable state)
This state is only applicable to the solution heat treatment, natural aging of the alloy at room temperature, the state code only indicates that the product is in the natural aging stage.
T Heat treatment state (different from F, O, H state)
This state is suitable for products that have been heat treated and have reached stability with (or without) work hardening. the T designator must be followed by one or more Arabic numerals. The first digit after the T indicates the basic type of heat treatment (from 1 to 10), subsequent digits indicate variations in heat treatment details. For example, 6061-T 62; 5083-H 343, etc.
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