7475 aluminum plate is a high-strength aluminum alloy known for its excellent fatigue resistance and high thermal conductivity. It is an optimized derivative of the mature 7075 alloy system. Compared with 7075 in the same temper, 7475 offers about 40% higher fracture toughness, making it especially suitable for aerospace applications where resistance to cracking and long service life are critical.
Thanks to its high fracture toughness, 7475 aluminum alloy is widely used in key aircraft and space shuttle structural components that face extreme stress and strict safety requirements. In straightforward terms, Al 7475 can be regarded as an enhanced version of aerospace-grade 7075, specifically designed to enhance structural safety and durability.
You may wonder what 7475 aluminum alloy has in common with 7075. First, both alloys are part of the 7000 series of aluminum alloys and share a common basic alloy system. Zinc and magnesium are the main strengthening elements, with a small amount of copper added to further increase strength. Both alloys achieve high mechanical performance through a process that includes solution heat treatment, followed by artificial aging. This process results in a strong precipitation-hardened structure.
Features of 7475 Aluminum Plate
Outstanding Mechanical Performance
After proper heat treatment, 7475 aluminum alloy delivers very high mechanical strength. In T761 & T651 tempers, it offers improved fracture toughness and better ductility, making it suitable for high-stress structural applications.
Excellent Corrosion Resistance
The corrosion resistance of 7475 aluminum plate can be further enhanced through anodizing or Alclad coating. This makes it highly resistant to chemical exposure and harsh environments, especially in humid conditions or applications where steel performs poorly.
Lightweight with High Strength
7475 aluminium alloy maintains the low density of aluminum while achieving higher strength. This combination makes it ideal for projects that require both lightweight design and high structural performance, which is why it is widely used in demanding engineering applications.
Good Machinability
In the O temper, 7475 aluminum has good ductility and is easy to form. It is well suited for high-precision machining and for producing complex structural components with tight tolerances.
7475 Aluminum Plate Specification
| Alloy Grade |
7475 |
| Temper |
O, T61, T76, T761, T651, T7351, T7651 |
| Thickness |
0.2 – 6.0 mm or 6.0 – 250 mm |
| Width |
900 – 2650 mm |
| Length |
2000 – 12000 mm (custom cut available) |
| Standards |
AMS 4085 / AMS 4100 / AMS 4207 ASTM B209 EN 485 / EN 573 GB/T 3880 |
| Surface Treatment |
Alclad ,Anodized,Protective Film |
| MOQ |
1 TON |
| serivces |
Sample testing is supported, and certificates are provided. |
Chemical Composition of 7475 Aluminum Alloy (wt.%)
| Zinc (Zn) |
5.2 – 6.2 |
| Magnesium (Mg) |
1.9 – 2.6 |
| Copper (Cu) |
1.2 – 1.9 |
| Chromium (Cr) |
0.18 – 0.25 |
| Iron (Fe) |
≤ 0.12 |
| Silicon (Si) |
≤ 0.10 |
| Titanium (Ti) |
≤ 0.06 |
| Other Elements (each) |
≤ 0.05 |
| Other Elements (total) |
≤ 0.15 |
| Aluminum (Al) |
Balance |
Properties of 7475 Aluminum Sheet / Plate
7475 T761 / T76 (Alclad) Sheet / Plate
| Ultimate Tensile Strength (Rm) |
455 – 485 MPa |
| Yield Strength (Rp0.2) |
380 – 415 MPa |
| Elongation (A50) |
8 – 10 % |
| Brinell Hardness (HB) |
~150 |
| Fatigue Resistance |
Excellent |
| Stress Corrosion Resistance |
Very Good |
7475 T651 Sheet
| Ultimate Tensile Strength (Rm) |
470 – 510 MPa |
| Yield Strength (Rp0.2) |
400 – 440 MPa |
| Elongation (A50) |
7 – 9 % |
| Brinell Hardness (HB) |
~155 |
| Fracture Toughness |
High |
7475 T7351 / T7651 Sheet
| Ultimate Tensile Strength (Rm) |
430 – 470 MPa |
| Yield Strength (Rp0.2) |
360 – 400 MPa |
| Elongation (A50) |
9 – 11 % |
| Stress Corrosion Cracking Resistance |
Excellent |
| Fracture Toughness |
Superior to 7075 |
7475 O (Annealed) Sheet
| Ultimate Tensile Strength (Rm) |
~220 MPa |
| Yield Strength (Rp0.2) |
~130 MPa |
| Elongation (A50) |
≥ 15 % |
| Formability |
Excellent |
Applications of 7475 Aluminum Plate
7475 aluminum plate is mainly used in engineering and structural fields that require extremely high strength, toughness, and long-term reliability. Its stable performance makes it a preferred material for critical load-bearing components.
Aerospace Applications
7475 aluminum plate is widely used in aircraft and space structures, including fuselage skins, wing spars, internal frames, and support structures. It is also applied in landing gear brackets, connectors, and other high-stress areas where structural safety is essential.
In space and aerospace vehicles, it is commonly used for rocket components, spacecraft structural frames, large integrated load-bearing panels, and other critical parts with very high safety margin requirements.
High-Precision Industrial Applications
In industrial fields, 7475 aluminum plate is used for high-strength mechanical components, precision molds, and structural support and connection parts. Its combination of strength, toughness, and machinability makes it suitable for demanding precision engineering applications.
