Which Is Harder: 7075-T6 Or 7075-T651 aluminum

Forged 7075-T6 Aluminum Overview

Forged 7075-T6 aluminum is a cold-treated, high-strength aluminum alloy whose strength is significantly higher than that of mild steel. It offers excellent mechanical properties, strong anodizing performance, and a refined grain structure.

Thanks to its fine grain size, 7075-T6 delivers improved deep-hole drilling capability, enhanced tool wear resistance, and more consistent thread-rolling performance, making it ideal for precision machining and high-load applications. GNEE supplies forged 7075-T6 aluminum with stable quality and reliable performance.

What Is the Difference Between 7075 and 7075-T6?

7075 refers to the aluminum alloy grade itself, while T6 indicates the heat-treatment condition applied to the material.

7075 alloy defines the chemical composition.

T6 temper represents solution heat treatment followed by artificial aging to achieve high hardness and strength.

Compared with other tempers:

T5 is naturally cooled, features a lower deformation coefficient, is easier to control during processing, and has moderate hardness.

T6 is water-quenched, has a higher deformation coefficient, is more difficult to control, but delivers significantly higher hardness and strength.

In aluminum tempers such as T3, T4, T5, and T6, a higher number generally indicates greater hardness and strength.

Typical 7000-Series Aluminum Tempers

7000-series aluminum alloys, including 7075, are commonly available in the following tempers:
T1, T3, T4, T5, T6, and T8, each offering different balances of strength, formability, and stress relief.