7039 aluminum alloy is a medium and high strength Al-Zn-Mg aluminum alloy developed by the United States. It has excellent welding performance, elastic resistance and good processing and formability, and is widely used as a gun frame and armor structure. 7039 is used for refrigerated containers, cryogenic equipment and storage boxes, fire-fighting pressure equipment, military equipment, armor plates, and missile installations. 7039 aluminum alloy is an aluminum alloy principally containing zinc (3.5–4.5%) as an alloying element. It is heat treatable wrought aluminum alloy. It is used for making armour suites.

Heat Treating T Temper Codes for Aluminium 7039 Plates:

T1 – Cooled from an elevated temperature shaping process and naturally aged to a substantially stable condition.
T2 – Cooled from an elevated temperature shaping process, cold worked, and naturally aged to a substantially stable condition.
T3 – Solution heat treated, cold worked, and naturally aged to a substantially stable condition.
T4 – Solution heat treated, and naturally aged to a substantially stable condition.
T5 – Cooled from an elevated temperature shaping process then artificially aged.
T6 – Solution heat treated then artificially aged.
T7 – Solution heat treated then overaged/stabilized.
T8 – Solution heat treated, cold worked, then artificially aged.
T9 – Solution heat treated, artificially aged, then cold worked.
T10 – Cooled from an elevated temperature shaping process, cold worked, then artificially aged.
Additional digits may be used after the first T temper digit to indicate subsequent stress relieving by processes such as stretching, compressing, or a combination.


H Temper Strain Hardening Codes for Aluminium 7039 Plates:

H1 – Strain hardened only
H2 – Strain hardened and partially annealed
H3 – Strain hardened and stabilized
H4 – Strain hardened and lacquered or painted. This assumes that thermal affects from the coating process affect the strain hardening; seldom encountered.

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