Aluminum rod W solid solution heat treatment state (an unstable state) is only applicable to alloys that are naturally aged at room temperature after solid solution heat treatment, and this special code is used only when the natural aging time is specified, such as W1/2 hours; T is a stable state produced after heat treatment (different from F, O and H states), which is suitable for products that have been heat treated to produce a stable state (such products can also be work-hardened).
The T letter is always preceded by one or more Arabic numerals; Aging Most profiles need to be heat treated in an aging furnace after quenching. The main function of aging is to reconfigure the alloy elements (magnesium and magnesium) so that they can be evenly distributed in all parts of the profile to improve the strength of the profile.
