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.

Mechanical Properties (Reference Data)

T4 temper

Ultimate tensile strength (UTS): ~324 MPa

Yield strength: ~215 MPa

Elongation: ~11%

Electrical conductivity: 40–49%

T5 temper

Ultimate tensile strength (UTS): ~345 MPa

Yield strength: ~305 MPa

Elongation: ~9%

Electrical conductivity: 40–49%

T6 temper

Ultimate tensile strength (UTS): ~350 MPa

Yield strength: ~290 MPa

Elongation: ~8%

Electrical conductivity: 40–49%

Key Characteristics of 7075-T6 Aluminum Plate

High-strength, heat-treatable aluminum alloy

Excellent mechanical performance

Good machinability and usability

Easy to process with strong wear resistance

Good corrosion resistance and oxidation resistance

These features make 7075-T6 aluminum plate a core product offered by GNEE for demanding industrial applications.

Export Control Compliance Notice - High-Strength Aluminum Alloys

Certain high-strength aluminum alloy products supplied by GNEE are subject to the export control regulations of the People's Republic of China for dual-use items and technologies. Under these regulations, the export, re-export, or transfer of such items generally requires an export license issued by the competent Chinese authorities. Unlicensed export of the controlled item categories is prohibited.

The alloys listed in the table below represent product categories commonly affected by these controls. Whether a specific inquiry or order is controlled depends on the alloy grade, temper, product form, dimensions, quantity, and intended end-use.

GNEE does not export to parties or destinations prohibited under applicable export control and international sanctions laws.