7075-T651 aluminum plate belongs to the Al-Zn-Mg-Cu series of ultra-high-strength aluminum alloys. First developed and commercialized by Alcoa in 1943, this alloy has long been a core material within the aerospace industry and remains one of the most representative products of the 7xxx series aluminum alloys.
By adding chromium to the Al-Zn-Mg-Cu high-strength alloy system, 7075 aluminum plate achieves improved resistance to stress corrosion cracking. Thanks to its excellent mechanical performance and favorable anodizing behavior, 7075-T651 aluminum plate offers an outstanding balance of strength, reliability, and durability, making it especially suitable for aerospace and other high-performance structural applications.
As a professional aluminum plate supplier, GNEE provides stable-quality 7075-T651 aluminum plates for demanding industrial uses worldwide.
7075-T651 Aluminum Plate Properties
7075-T651 aluminum plate is characterized by high hardness and superior mechanical strength. Typical physical and mechanical properties include:
Hardness: approximately 150 HB
Density: about 2.81 g/cm³
Tensile strength: around 524 MPa
Elongation: approximately 11%
After solution heat treatment, the alloy exhibits excellent plasticity, strong heat-treatment responsiveness, high strength at temperatures up to 150 °C, and good low-temperature performance. However, its welding performance is relatively poor, and it shows a tendency toward stress corrosion cracking. For this reason, surface protection such as aluminum cladding or other protective treatments is commonly applied in practical use.
The primary alloying element in 7075 aluminum plate is zinc, with magnesium and copper added to further enhance strength. Increasing the zinc and magnesium content can raise tensile strength, but it may also reduce resistance to stress corrosion and exfoliation corrosion, requiring careful alloy balance and processing control.
Key Features of 7075-T651 Aluminum Plate
High-strength, heat-treatable aluminum alloy
Excellent mechanical properties under high load
Good usability for precision machining
Easy to process with good wear resistance
Reliable corrosion resistance and oxidation resistance after proper treatment
These characteristics make 7075-T651 aluminum plate one of the most trusted materials for high-stress structural applications.
Chemical Composition of 7075-T651 Aluminum Plate (WT%)
Silicon (Si): ≤ 0.40
Iron (Fe): ≤ 0.50
Copper (Cu): 1.2–2.0
Manganese (Mn): ≤ 0.30
Magnesium (Mg): 2.1–2.9
Chromium (Cr): 0.18–0.28
Zinc (Zn): 5.1–6.1
Titanium (Ti): ≤ 0.20
Single impurity: ≤ 0.05
Total impurities: ≤ 0.15
Balance: Aluminum
Mechanical Properties of 7075-T651 Aluminum Plate
Typical performance data include:
Tensile strength: ≈ 525 MPa
Yield strength: ≈ 503 MPa
Elongation: ≈ 11%
Volume expansion coefficient: 68 × 10⁻⁶ m³/(m³·K)
Electrical conductivity (20 °C): ≈ 33% IACS
Electrical resistivity (20 °C): ≈ 52.2 nΩ·m
Elastic modulus: ≈ 71 GPa
Hardness: ≈ 150 HB
Density: ≈ 2820 kg/m³
These properties highlight the excellent strength-to-weight ratio of 7075-T651 aluminum plate, especially in comparison with lower-strength aluminum alloys.
Applications of 7075-T651 Aluminum Plate
Thanks to its exceptional strength and reliable performance, 7075-T651 aluminum plate is widely used in industries requiring high load-bearing capacity and structural integrity, including:
Aerospace structural components and aircraft parts
Aviation fixtures and tooling
Truck and transportation components
Tower structures and high-strength building elements
Ships, pipelines, and heavy industrial structures
Precision parts such as gears, shafts, instrument spindles, and fasteners
Golf club heads, molds, and high-wear components
Aircraft, turbine, missile, and other critical defense and aerospace parts
Due to its performance advantages, 7075-T651 aluminum plate remains one of the most valuable and irreplaceable alloy materials in modern industry.
GNEE 7075-T651 Aluminum Plate Solutions
GNEE supplies high-quality 7075-T651 aluminum plates with stable mechanical properties, controlled internal stress, and reliable chemical composition. We support customized cutting, machining, and technical selection to meet the requirements of aerospace, transportation, and high-end industrial customers.
