7075 T6 T651 T7351 Aircraft Aluminum Plate

What Is 7075 Aircraft Aluminum

7075 aluminum plate is a high-strength, heat-treatable aluminum alloy belonging to the Al-Zn-Mg-Cu series, widely used in aerospace, military equipment, and high-end sports equipment fields that require extremely high material performance. It primarily uses zinc (Zn), magnesium (Mg), and copper (Cu) as the main alloying elements, and achieves the ultimate balance of strength and toughness through solid solution strengthening and aging treatment.

• 7075 T6 indicates that it has undergone solution treatment and aging, resulting in high strength.
• 7075 T651 is a tensile treatment under the T6 state, which helps reduce internal stress.
• 7075 T7351 has undergone special treatment to enhance corrosion resistance and toughness.

7075 T6 T651 T7351 Aircraft Aluminum Plate Chemical Composition

7075 Aluminum Plate Characteristics

• Ultra-high Strength and Lightweight Tensile strength can reach 500-700 MPa, more than twice that of 6-series aluminum, with a density of only one-third that of steel.
• Fatigue Resistance and Stress Corrosion Resistance Remains stable over the long term under alternating loads and corrosive environments, suitable for high-stress and high-risk extreme conditions.
• Excellent Machinability Supports forging, rolling, extrusion, and CNC precision machining, with further performance potential unlocked through heat treatments such as T6 and T73.
• Good Weldability Can adopt advanced processes such as friction stir welding and laser welding, with significantly improved weather resistance after anodizing.

Specification of 7075 Aluminum Plate

7075 Aluminum Plate Thickness

Standard Thickness Range of 7075 Aluminum Plate

Common Thickness Specifications Table of 7075 Aluminum Plate

According to common market products, the standard thickness specifications of 7075 aluminum plate are as follows (unit: mm):

7075 Aluminum Plate Thickness Tolerances

7075 Aluminum Thin Plate Thickness Tolerance Table (unit: mm)

7075 Aluminum Medium and Thick Plate Thickness Tolerance Table (unit: mm)

Characteristics and Differences of 7075 Aluminum Plate in Different Temper Conditions

Main Characteristics and Differences of 7075 Aluminum Tempers

The main characteristics and differences of 7075 aluminum plate tempers are as follows:

7075 T6 T651 T7351 Aircraft Aluminum Plate Mechanical Properties

Inventory of Haomei 7075 aerospace grade aluminium sheet plate

Applications of 7075 T6 T651 T7351 Aircraft Aluminum Plate

7075 T6 aerospace grade aluminum sheet plate

The T6 state is commonly used for manufacturing structural components of aircraft, such as wings, fuselage frames, and landing gears. Due to its high strength and good fatigue resistance, T6 state 7075 aluminum alloy is suitable for parts that endure high stress.

7075 T651 aerospace grade aluminum sheet plate

The T651 state is suitable for manufacturing large components, such as fuselage and wing beams, which require stability in dimensions and shapes after processing. T651 state 7075 aluminum alloy performs well in welding and machining, reducing internal stresses caused by processing.

7075 T7351 aerospace grade aluminum sheet plate

The T7351 state is primarily used in aerospace applications for high-strength components, like critical and high-load parts, especially suited for operation in harsh environments.

Haomei 7075 Aluminum Products for Sale

7075 Aluminum Sheet, 7075 Aluminum Plate

• Temper: 7075-0, 7075-T6, 7075-T73, 7075-T76, 7075-T651, 7075-T7351, 7075-T7651
• Bare: QQ-A-250/12, QQ-A-250/24, AMS 4044, AMS 4055, AMS 4078
• Clad: QQ-A-250/13, QQ-A-250/25, AMS 4088, AMS 4049, BMS 7-302

• 7075-0 Bare Aluminum Sheet Per QQ-A-250/12
• 7075-T6 Bare Aluminum Sheet Per QQ-A-250/12, Kaiser Stretch
• 7075-T6 Alclad Aluminum Sheet Per QQ-A-250/13
• 7075-T6 Alclad MRS Quality Aluminum Sheet Per QQ-A-250/13
• 7075-T651 Aluminum Plate Per AMS 4045 with MIL-STD-2154 Class A Ultrasonic Inspection
• 7075-T7351 Aluminum Plate Per QQ-A250/12

7075 Aluminum Bar (Cold Finish and Extruded)

• Temper: 7075-0, 7075-T6, 7075-T651, 7075-T6511, 7075-T73, 7075-T7351, 7075-T73511
• Specification: QQ-A-225/9, QQ-A-200/11, AMS 4123, AMS 4124, AMS 4154, AMS 4166, AMS 4167, AMS 4168, AMS 4169, AMS 4186, AMS 4187, AMS 4147

• 7075-T651 Cold Finish Bar Per QQ-A-225/9, AMS-QQ-A-225/9, ASTM-B-211, AMS 4123
• 7075-T6 Extruded Bar Per QQ-A-200/11, AMS-QQ-A-200/11, ASTM-B-211, AMS 4154
• 7075-T6511 Extruded Bar Per QQ-A-200/11, AMS-QQ-A-200/11, ASTM-B-211, AMS 4169
• 7075-T73 Cold Finish Bar Per QQ-A-225/9, AMS-QQ-A-225/9, ASTM-B-211, AMS 4122
• 7075-T7351 Cold Finish Per QQ-A-225/9, AMS-QQ-A-225/9, ASTM-B-211, AMS 4124
• 7075-T73511 Extruded Bar Per QQ-A-200/11, AMS-QQ-A-200/11, ASTM-B-221, AMS 4167

7075 Aluminum Tube

• 7075-T6 Aluminum Tube Per WW-T-700/7
• 1-1/4" OD x 0.065" x 12 FT
• 1-1/8" OD X 0.156" x 12 FT

Processing and Surface Treatment of 7075 Aluminum Plate

Procurement and Quality Control of 7075 Aluminum Plate

Selection of 7075 Aluminum Plate Specifications and Standards

When procuring 7075 aluminum plate, the following specifications and standards should be considered:

• Material standards: ASTM standards (ASTM B209), AMS standards (such as AMS 4045, AMS 4075), military standards (MIL-A-8190D), aerospace standards
• Temper standards: T6 temper (compliant with SAE AMS 4045 standard), T651 temper (compliant with SAE AMS 4045 standard), T7351 temper (compliant with SAE AMS 4075 standard)
• Quality certifications: aerospace certification, classification society certifications (such as China Classification Society and Lloyd's Register), ISO certifications (e.g., ISO 9001)

Key Points of Quality Control for 7075 Aluminum Plate

The quality control of 7075 aluminum plate mainly includes the following aspects:

Why is Aluminum 7075 used in aircraft?

• High Strength: 7075 aluminum alloy is the strongest among aluminum alloys, offering excellent tensile and yield strength, capable of withstanding various loads and stresses encountered during flight.
• Lightweight: The relatively low density of aluminum alloys allows for a reduction in overall aircraft weight while ensuring strength, which is crucial in aviation manufacturing for improving fuel efficiency and payload capacity.
• Good Fatigue Performance: 7075 aluminum alloy exhibits excellent fatigue strength, able to endure repeated loads and stress variations, essential for the dynamic loads experienced during flight.
• Good Machinability: 7075 aluminum alloy can be formed using various machining methods (such as milling, stamping, extrusion, etc.), making it suitable for complex component manufacturing.
• Corrosion Resistance: Although 7075 aluminum alloy has lower corrosion resistance compared to some other alloys (like 6061), with proper surface treatments (like anodizing), it can still provide adequate corrosion resistance for various environmental conditions.
• Heat Treatment Capability: 7075 aluminum alloy can significantly improve its strength and hardness through heat treatment (such as T6, T651 states), enhancing its performance in high-performance applications.

What are the disadvantages of 7075 aluminum?

The main disadvantages of 7075 aluminum include relatively poor corrosion resistance and greater difficulty in machining. In extreme environments, additional surface treatments may be necessary. Additionally, compared to other aluminum alloys, it has lower ductility and limited welding performance.

• Poor Corrosion Resistance: 7075 aluminum alloy is relatively less resistant to corrosion, especially in marine or humid environments, making it prone to oxidation and corrosion. Thus, surface treatments are usually required to enhance its corrosion resistance.
• Difficult to Machine: Although high in strength, 7075 aluminum alloy poses significant machining challenges. It is prone to cracking during cutting and forming processes, requiring appropriate tools and processing parameters.
• Poor Welding Performance: The welding performance of 7075 aluminum alloy is relatively poor, with strength reduction after welding, and the welded areas can be brittle.
• Higher Cost: Compared to other aluminum alloys, the production cost of 7075 aluminum alloy is higher, making it potentially unsuitable for budget-constrained projects.
• Strict Heat Treatment Requirements: The performance of 7075 aluminum alloy depends heavily on heat treatment, and any improper handling during the process can affect its mechanical properties.
• Brittle: Under certain conditions, 7075 aluminum alloy may exhibit brittleness, particularly in low-temperature environments, which can lead to material fracture.

Which is better, 6061 or 7075 aluminum?

If high strength is required and welding performance is not a priority, 7075 is preferable. However, if good weldability, corrosion resistance, and relatively better mechanical properties are needed, 6061 may be the better choice.

• 6061 Aluminum: Lower strength, with good corrosion resistance and machinability, suitable for structural and non-load-bearing components.
• 7075 Aluminum: High strength, suitable for parts that need to bear heavy loads, but with poorer corrosion resistance and greater machining difficulty.

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