7050 T7451 Aircraft Aluminum Plate Sheet
7050 aluminum plate is a high-strength aluminum alloy mainly used in the aerospace industry, especially for parts that need to withstand high stress and harsh environmental conditions. It belongs to the 7000 series aluminum alloys and is similar to 7075 alloy but has some significant advantages that make it more attractive for certain applications.
The 7050 T7451 aerospace aluminum plate is a zinc-based aluminum alloy primarily used for structural components requiring high strength and corrosion resistance. Its chemical composition allows it to achieve extremely high strength after heat treatment, making it especially suitable for the aerospace industry.
The 7050 T7451 temper refers to artificial aging treatment that ensures the material's stability at high temperatures. In addition, this aluminum plate has good weldability and is widely used in wings, fuselage, and other critical components. Its excellent fatigue resistance and stress corrosion performance enable it to perform exceptionally well under harsh conditions.
The 7050 T7451 aerospace aluminum plate is a high-strength aluminum alloy material widely used in aerospace, automotive, and other demanding engineering fields.
The 7050 aluminum plate is a high-strength, heat-treatable alloy mainly used in aerospace applications, where excellent mechanical properties and corrosion resistance are crucial.
The 7050 aluminum plate belongs to the third generation of advanced international aluminum alloy materials. It has excellent comprehensive performance and is widely used in aerospace, shipbuilding, mechanical equipment, and other fields.
The 7050 aluminum plate balances stress corrosion resistance, exfoliation corrosion resistance, and fracture toughness. Its typical grade is 7050-T7451, which replaces traditional chromium (Cr) with zirconium (Zr) to reduce quenching sensitivity and suppress recrystallization, further enhancing material performance.
Advantages of 7050 Aluminum Plate
- Strength and Toughness: 7050 aluminum alloy strikes a good balance between strength and toughness. Its strength is close to that of 7075 aluminum alloy, but it offers better toughness, especially in thicker sections. This makes 7050 more reliable in aerospace structures, particularly for critical parts like fuselage and wing skins, where it can withstand higher mechanical stresses.
- Corrosion Resistance and Anti-Exfoliation: Compared to 7075 aluminum alloy, 7050 offers stronger corrosion resistance. Particularly in terms of stress corrosion resistance, 7050 excels over 7075 and has better anti-exfoliation corrosion properties. Its resistance to stress corrosion cracking (SCC) is particularly notable in thick plates, making it suitable for long-term stable applications, such as aircraft fuselages and other parts exposed to harsh environments.
- Quench Sensitivity: 7050 aluminum alloy has lower quench sensitivity compared to 7075. This means that, even in thick plates, 7050 can maintain more uniform strength and other mechanical properties during production without being as prone to deformation during the quenching process as 7075.
- Suitable for Thick Plates: 7050 alloy is particularly suitable for aluminum plates with thicknesses between 3 to 6 inches (approximately 75 to 150 mm). This makes 7050 an ideal choice for manufacturing large-section structural components, especially in aircraft and spacecraft, where these thick plates are required to carry large loads.
The Specification of 7050 Aluminum Plate
| Alloy | Temper | Thickness (mm) | Width(mm) |
| 7050 | T7451 | 4-260 | 1200-3800 |
| T7651 | 4-260 | 1200-3800 |
Haomei Aluminum offers 7050 aluminum in various forms and specifications, including 7050 round bars in the T74511 (AMS 4342) condition.
- AMS 4050: 7050-T7451 Plate
- AMS 4107: 7050-T74 Die Forging
- AMS 4108: 7050-T7452 Hand Forgings
- AMS 4201: 7050-T7651 Plate
- AMS 4333: 7050-T7452 Forgings
- AMS 4340: 7050-T76511 Extrusions
- AMS 4341: 7050-T73511 Extrusions
- AMS 4342: 7050-T74511 Extrusions
7050 Aluminum Temper and Heat Treatment
7050 is typically available in two conditions:
- T7451: prioritizes stress corrosion and exfoliation resistance, with slightly lower strength (e.g., AMS 4050 standard)
- T7651: maximizes strength (e.g., tensile strength about 76 ksi) but has average stress corrosion cracking resistance (AMS 4201)
Other specifications include ASTM B209, AMS 4340, and EN 3982, specially tailored for aerospace standards.
| Product Condition | Description |
| 7050-T7451 | 7050-T7451 aluminum alloy is a thick plate material subjected to solution heat treatment, quenching, mild stretching, and high-temperature artificial aging, possessing excellent resistance to stress corrosion cracking and good overall strength. This condition is especially suitable for aerospace environments with extremely high corrosion sensitivity, widely used in main load-bearing aircraft structures such as wing beams, landing gear beams, and fuselage connection structures. It maintains good performance under high strength demands and corrosive environments, ensuring aircraft structural safety and lifespan. |
| 7050-T7651 | 7050-T7651 aluminum alloy is produced by longer or higher temperature artificial aging treatment based on T7451, further enhancing the material's strength while still maintaining good resistance to stress corrosion cracking. This condition is mainly used for aerospace structural parts with high load and strength requirements. Typical applications include thick wing main beams and load-bearing frameworks, especially suitable for military and commercial aircraft structures with long service cycles and difficult maintenance, ensuring reliability and safety. |
| 7050-T74511 | 7050-T74511 aluminum alloy is a heat treatment condition for extruded profiles, involving solution heat treatment, quenching, mild stretching, and high-temperature artificial aging, offering excellent resistance to exfoliation corrosion and stress corrosion cracking. This condition is widely used in manufacturing high-strength extruded aircraft parts, such as stiffeners, frame profiles, and connectors. It is the preferred material for aerospace structural parts that require both corrosion resistance and high strength, ensuring stability and durability of structural components in complex service environments. |
| 7050-T6 | 7050-T6 aluminum alloy undergoes solution heat treatment and single-stage artificial aging, exhibiting extremely high tensile and yield strength, outperforming most other tempers in strength. However, this condition has relatively poor resistance to stress corrosion cracking and is not suitable for long-term exposure to corrosive environments. It is mainly used in non-load-bearing structural parts with extremely high strength requirements but controlled or acceptable corrosion environments, such as test structural samples or reinforcements in space-limited areas, meeting high strength demands but relatively low corrosion resistance needs. |
| 7050-T7351 | 7050-T7351 aluminum alloy uses a two-stage artificial aging process that significantly improves corrosion resistance, particularly showing excellent resistance to exfoliation corrosion and stress corrosion cracking in thick plate applications. This condition is widely used in aerospace main load-bearing structures, such as large box beams, webs, and skins, especially suitable for key structural parts of military and large civil aircraft, ensuring excellent corrosion resistance and structural strength during long-term service. |
| 7050-T74 | 7050-T74 aluminum alloy achieves a good balance between corrosion resistance and moderate strength through a special two-stage artificial aging process. This condition is commonly used in aircraft parts with relatively high long-term service reliability requirements but moderate structural load, such as medium-thickness skins and support components. 7050-T74 provides an excellent balance of service life and process performance, making it an ideal choice balancing material properties and cost-effectiveness, widely applied in non-primary load-bearing areas of aerospace structures. |
Characteristics of 7050 T7451 Aircraft Aluminum Plate Sheet
- High Strength: Compared to other aluminum alloys, 7050 aluminum alloy provides higher strength, suitable for high-load flight environments.
- Lightweight: Reduces the overall weight of the aircraft, improving fuel efficiency and payload capacity.
- Corrosion Resistance: In aviation environments, 7050 aluminum alloy has strong resistance to corrosion, extending the lifespan of components.
- Good Machinability: Despite its high strength, 7050 aluminum alloy still exhibits good weldability and machinability, making it easy to manufacture complex aerospace structures.
7050 T7451 Aircraft Aluminum Plate Sheet Chemical Composition
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Zr | Ti | Standard |
| 7050 | 0.12 | 0.15 | 2.0-2.6 | 0.10 | 1.9-2.6 | 0.04 | 5.7-6.7 | 0.08-0.15 | 0.06 | GB/AMS/EN |
7050 T7451 Aircraft Aluminum Plate Sheet Mechanical Properties
| Material | Temper | Thickness | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation in 2" % |
| Alloy 7050 Plate (longitudinal) | T7451 | <2.0 | 74 | 64 | 10 |
| Alloy 7050 Plate (longitudinal) | T7451 | 2.0 -3.0 | 73 | 63 | 9 |
| Alloy 7050 Plate (longitudinal) | T7451 | 3.0 - 4.0 | 72 | 62 | 9 |
| Alloy 7050 Plate (longitudinal) | T7451 | 4.0 - 5.0 | 71 | 61 | 9 |
| Alloy 7050 Plate (longitudinal) | T7651 | 0.25 - 1.0 | 76 | 66 | 9 |
| Alloy 7050 Plate (longitudinal) | T7651 | 1.0 - 1.5 | 77 | 67 | 9 |
| Alloy 7050 Plate (longitudinal) | T7651 | 1.5 - 2.0 | 76 | 66 | 9 |
| Alloy 7050 Plate (longitudinal) | T7651 | 2.0 - 3.0 | 76 | 66 | 8 |
7050 Aluminum Plate Physical Properties
| Property | Value |
| Density | 2.83 g/cm³ (0.102 lb/in³) |
| Annealing Temperature | 415°C (775°F) |
| Solution Heat Treatment Temperature | 475°C (890°F) |
| Aging Temperature | 120-175°C (250-350°F) |
7050 Aluminum Plate Core Performance Features
Corrosion Resistance
Outstanding resistance to stress corrosion cracking (SCC) and exfoliation corrosion, superior to most 7xxx series aluminum alloys.
Environmental Adaptability
Fatigue resistance, damage tolerance, suitable for high stress cyclic load scenarios.
Electrical conductivity of 41% IACS, density 2.83g/cm³, combining lightweight and conductivity.
Advantages of 7050 Aluminum Plate Over Similar Alloys
Compared with the well-known 7075 aluminum alloy, 7050 aluminum alloy has the following advantages:
- Excellent resistance to stress corrosion cracking.
- Better toughness, especially in thick sections.
- Lower quenching sensitivity, resulting in more uniform mechanical properties in large cross-sections.
- Thick section performance: lower quenching sensitivity allows 7050 to maintain strength in plates up to 6 inches thick, unlike 7075.
- Corrosion resistance: superior resistance to stress corrosion cracking and exfoliation corrosion, reducing maintenance requirements in harsh environments.
- Machinability: stable performance in thick products, critical for precision aerospace components.
Differences Compared to 7075 Aluminum Alloy
| Comparison Item | 7050 Aluminum Plate | 7075 Aluminum Plate |
| Alloy Adjustment | Increased Zn/Cu content, optimized Cu/Mg ratio, Zr replaces Cr | Traditional Al-Zn-Mg-Cu system, contains Cr |
| Performance Advantages | Higher strength, better stress corrosion resistance, lower quenching sensitivity | Lower cost, but poorer weldability and corrosion resistance |
| Application Focus | High-end aerospace structural parts, marine environment components | General high-strength parts, CNC machined components |
Applications of 7050 Aluminum Plate in Aerospace
Due to its high strength and corrosion resistance, 7050 aluminum plate is widely used in aerospace and military fields, including:
- Aircraft structural components, such as fuselage frames and bulkheads
- Wing skins and other critical fuselage parts
- Military aircraft structures requiring high strength and durability
Aerospace: Because it maintains strength in thick sections, it can be used to manufacture bulkheads, fuselage frames, wing skins, and spacecraft fuel tanks.
| Field | Specific Application Scenarios |
| Aerospace | Aircraft wing beams, engine mounts, landing gear support structures, and other high-stress components. |
Fuselage Structure
The 7050 T7451 aluminum plate is commonly used for structural components of the aircraft fuselage. Due to its high strength and lightweight characteristics, it effectively reduces the overall weight of the aircraft, improving fuel efficiency and payload capacity. Specific applications include:
- Fuselage Frame: Used to support the main structure of the fuselage, providing strength and rigidity.
- Outer Skin Panels: Used to cover the exterior of the fuselage, providing protection and reducing aerodynamic drag.
Wing Structure
- Wing Spars: As the main load-bearing structure of the wing, the 7050 aluminum plate can withstand high loads during flight.
- Wing Ribs: Used to support and enhance the structural strength of the wing, ensuring stability during flight.
Landing Gear
- Landing Gear Support Structures: Due to the high strength and good fatigue resistance of 7050 aluminum, it can withstand impact loads during takeoff and landing.
- Brackets and Connectors: Provide necessary strength and stability in the connection and support parts of the landing gear.
Cargo and Passenger Cabin Structures
- Cargo Floor: The 7050 T7451 aluminum plate is used for the floor structure of the cargo hold, capable of supporting heavy loads while remaining lightweight.
- Interior Walls and Partitions: Used for the interior walls and partitions of the passenger cabin, providing structural support while maintaining lightness inside the cabin.
Other Structural Components
- Engine Mounts: The 7050 T7451 aluminum plate provides necessary strength and stability in the engine installation and support areas.
- Control Surfaces: Structural components such as ailerons and rudders, ensuring effectiveness and safety during flight.
The 7050 T7451 aluminum plate is also used in high-performance automotive parts, sports equipment, high-end bicycle frames, and shipbuilding.
Other Fields Where 7050 Aluminum Is Also Used
- Defense: Armored vehicles and military equipment requiring high durability
- Industry: High-stress mechanical parts and molds
- Sports Equipment: Bicycle frames and high-performance gear
| Field | Specific Application Scenarios |
| Shipbuilding Engineering | Hull structures, decks, seawater pump components, relying on its marine corrosion resistance and fatigue resistance. |
| Industrial Manufacturing | Mold processing, tooling fixtures, hydraulic equipment, utilizing high strength and wear resistance. |
7050 Aluminum Plate Manufacturing and Processing
Although 7050 aluminum has limited cold workability, its good machinability makes it suitable for manufacturing precision components. However, welding is generally not recommended as it may reduce the strength and corrosion resistance in the weld zone.
7050 Aluminum Processing and Welding
Although 7050 aluminum alloy has high strength, its machinability remains good compared to other high-strength alloys. After heat treatment, it retains excellent mechanical properties and can accommodate various manufacturing processes. However, due to its high strength, the weldability of 7050 aluminum alloy is poor and requires appropriate welding methods, such as using special aluminum welding alloys or suitable preheating and post-treatment processes, to ensure the quality of the welded joints.
7050 aluminum plate is a critical material in the aerospace industry, performing excellently in applications requiring high strength, superior corrosion resistance, low quenching sensitivity, and outstanding toughness. Its comprehensive performance makes it a more reliable choice than traditional high-strength aluminum alloys like 7075, especially in thicker material applications. 7050 can maintain more stable properties and reduce potential risks caused by stress corrosion. Therefore, 7050 aluminum plate is an ideal material for manufacturing aircraft, spacecraft, and other high-end aerospace components.
Manufacturing Considerations
- Welding: Welding is not recommended due to the presence of porosity and low weld strength. Gas Tungsten Arc Welding (GTAW) is not advised.
- Heat Treatment: Aging treatment needs to be performed at 122-163°C (250-325°F) to improve strength through precipitation hardening.
- Formability: The best forming condition is full annealing (softened state), but cold workability is limited.
7050 Aluminum Plate Industry Standards
Standards: AMS 4050 (T7451), AMS 4201 (T7651), and ASTM B209 are widely used.
7050 aluminum plate is a cornerstone of the aerospace and defense industries, offering unmatched strength, corrosion resistance, and durability. Its unique tempering characteristics and adaptability to thick cross-sections give it an irreplaceable advantage in high-stress applications, but due to welding limitations and precise heat treatment requirements, careful handling is necessary.
7050 aluminum plate is a premium aerospace alloy that combines high strength, excellent corrosion resistance, and good toughness, especially in thick-walled components. Its properties make it an ideal choice for critical structural parts in harsh environments.
Stock of Haomei 7050 aerospace aluminum plate Sheet
What is the difference between 6061 and 7050 aluminum?
In the aerospace field, 6061 aluminum alloy is commonly used for manufacturing aircraft fuselage structures, brackets, and components due to its good machinability and weldability.
- 7050 aluminum alloy is primarily used for high-strength structural applications in aerospace, such as aircraft wings, fuselages, and other load-bearing components, because of its high strength and good fatigue performance.
- Strength: 7050 aluminum alloy has a higher strength than 6061 aluminum alloy, making it suitable for components that bear greater loads.
- Weldability: 6061 aluminum alloy is easier to weld, while 7050 aluminum alloy has poorer welding performance.
- Application Fields: 6061 is suitable for structures with medium strength and corrosion resistance requirements, while 7050 is suitable for critical structures that require high strength and high fatigue performance.
What is the difference between 7050 and 7075 aluminum?
Due to its high strength and good fatigue performance, 7050 aluminum alloy is commonly used for critical structural components in the aerospace field, such as wings, fuselages, and load-bearing structures.
7075 aluminum alloy is often used for components that require extremely high strength in aerospace applications, such as aircraft wings, fuselages, and high-load structural components.
- Strength: The strength of 7075 aluminum alloy is generally higher than that of 7050 aluminum alloy, making it more commonly used in applications that require extremely high strength.
- Fatigue Resistance: 7050 aluminum alloy performs better in terms of fatigue performance, making it suitable for structures that endure repeated loads.
- Corrosion Resistance: The corrosion resistance of 7050 is superior to that of 7075, making it suitable for use in humid or corrosive environments.
- Weldability: Both alloys have poor weldability, but welding 7075 is more challenging.
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