7075 Aluminum Alloy Bars Supplier Aerospace Grade
7075 aluminum alloy is a premium ultra-high strength Al-Zn-Mg-Cu series aerospace-grade alloy. Compared with conventional 6000-series aluminum alloys, 7075 features outstanding tensile strength, superior fatigue resistance, and stable mechanical performance after heat treatment. It is the most widely used high-strength aluminum material for aerospace, defense, precision machinery, and high-load structural applications.
Shenzhen Chinalco Metal supply 7075 aluminum round bars in a wide range of diameters and standards, including extruded, casting, and cold drawn types for aerospace, tooling, and industrial use.
7075 Aluminum Alloy Chemical Composition
Strictly following ASTM standard specifications, the chemical composition of 7075 aluminum alloy ensures ultra-high strength and structural stability. Zinc serves as the primary strengthening element, while magnesium and copper further improve hardness and mechanical toughness.
Element Content (%)
Zinc (Zn) 5.10 – 6.10
Magnesium (Mg) 2.10 – 2.90
Copper (Cu) 1.20 – 2.00
Chromium (Cr) 0.18 – 0.28
Silicon (Si) ≤ 0.40
Iron (Fe) ≤ 0.50
Manganese (Mn) ≤ 0.30
Titanium (Ti) ≤ 0.20
Aluminum (Al) Balance
7075 Aluminum Mechanical Properties
Mechanical performance varies by different tempers. 7075-T6 and 7075-T6511 are the most mainstream aerospace tempers, delivering maximum strength and low residual stress for precision machining.
Main Mechanical Properties (Room Temperature)
- Tensile Strength: 540 – 572 MPa
- Yield Strength: 465 – 510 MPa
- Elongation: 8% – 11%
- Hardness (HB): 150 – 160 HB
- Density: 2.81 g/cm³
Performance Features
7075 alloy achieves strength close to mild steel while maintaining low aluminum density. Heat-treated 7075 exhibits excellent fatigue resistance and structural rigidity, suitable for long-term alternating load working conditions. The T6511 stress-relieved temper effectively reduces internal deformation, ensuring high dimensional accuracy after CNC processing.
7075 Aluminum Bars Standard Comparison Table
| Standard Number | Title / Type | Applicable Product Form | Common Tempers | Notes |
|---|---|---|---|---|
| AMS 4122 | Aluminum Alloy, Bars and Rods, 7075-T6 | Extruded or rolled bars | T6 | High-strength aerospace use |
| AMS 4123 | Aluminum Alloy, Bars and Rods, 7075-T73 | Extruded or rolled bars | T73 | Stress-corrosion resistant, aerospace grade |
| AMS 4124 | Aluminum Alloy, Bars and Rods, 7075-T73511 | Extruded bar | T73511 | Excellent corrosion resistance and mechanical strength |
| AMS 4165 | Forgings, 7075-T6 | Forged bars and shapes | T6 | High-strength forged bars |
| AMS 4167 | Forgings, 7075-T73 | Forged bars and shapes | T73 | Forged parts for aerospace structures |
| AMS-QQ-A-225/9 | Aluminum Alloy 7075, Bar, Rod, Wire | Drawn or extruded bar/rod/wire | T6, T651, T73, T7351 | Legacy MIL spec, now superseded by AMS |
| ASTM B211 | Aluminum and Aluminum-Alloy Bar, Rod, and Wire | General industrial bars | Multiple | For structural and machining applications |
| ASTM B221 | Aluminum and Aluminum-Alloy Extruded Bars, Rods | Extruded bars | Multiple | Used in non-aerospace structural parts |
| ISO 6361-3 | Wrought aluminium and aluminium alloys – Rod/bar | International standard | Multiple | Global standard for commercial-grade bars |
7075 Aluminum Bar – Available Diameters
Product Type Diameter Range (mm) Notes 7075 Aluminum Round Bars 5 – 40 mm, 380 – 560 mm Standard extruded round bars; widely used for structural, aerospace, and industrial applications 7075 Casting Aluminum Round Bars 5 – 20 mm Ideal for applications requiring near-net-shape and large diameter custom machining 7075 Cold Drawn Aluminum Round Bars 450 / 480 / 500 / 560 mm Precision-drawn bars for high dimensional accuracy and smooth surface finish
Key Advantages of Aerospace Grade 7075 Alloy
1. Ultra-high structural strength
7075 is one of the strongest commercial aluminum alloys available. Its mechanical strength far exceeds 6061 and 6063 alloys, capable of replacing partial steel structures to achieve lightweight design.
2. Excellent machining stability
Uniform grain structure and professional stress-relief treatment minimize post-processing deformation. The alloy offers stable cutting performance for high-precision CNC milling, drilling, and turning.
3. Reliable aerospace comprehensive performance
With outstanding fatigue resistance, impact resistance, and temperature stability, certified AMS-standard 7075 alloy adapts to extreme working environments and strict aviation safety standards.
7075 Aluminum Alloy Applications
As a classic aerospace alloy, 7075 is widely applied in fields requiring light weight + high strength + high precision:
Aerospace & Defense
Aircraft fuselage frames, wing components, aviation fixtures, missile structural parts, military equipment precision components
Precision Machinery & Mold Industry
High-load mechanical brackets, hydraulic system parts, mold base blanks, automotive racing structural parts
Advanced Industrial Manufacturing
UAV frames, robotic structural components, high-strength equipment fasteners, high-precision shaft parts
Our Supply Capacity
We provide customized extrusion, cutting, heat treatment, and precision straightening services for aerospace-grade 7075 aluminum alloy. All products comply with ASTM and AMS standards, supporting
