7150 T7751 T6151 Aircraft Aluminum Plate

What Is 7150 Aluminum Plate

7150 aluminum plate is a high-strength alloy primarily used in aerospace applications due to its excellent strength-to-weight ratio and good resistance to stress corrosion cracking. It is part of the 7000 series of aluminum alloys and is primarily alloyed with zinc.

7150 aluminum alloy is a heat-treatable forging alloy widely used in the aerospace industry, particularly in the manufacturing of aircraft components. Through heat treatment, 7150 aluminum alloy not only significantly improves corrosion resistance but also, in some cases, can slightly reduce strength.

Among the 7000 series aerospace alloys, 7150-T77 aluminum alloy stands out for its exceptional strength and corrosion resistance, providing the best balance between the two. This makes 7150 T77 alloy an ideal material choice for aerospace structural components.

7150 Aluminum Plate

7150 aircraft aluminum sheet size

Alloy	Temper	Thickness(mm)	Width(mm)
7150	T7751	4-260	1200-3800

Properties of 7150 Aircraft Aluminum Plate

High Strength: The 7150 aluminum plate has very high tensile and yield strength, making it suitable for applications that require lightweight yet strong materials.
Heat Treatment: This alloy can be heat-treated to achieve higher strength levels. It is typically processed in the T6 condition, which includes solution heat treatment and aging.
Corrosion Resistance: Although it has good corrosion resistance, it is not as resistant as some other aluminum alloys, particularly the 5000 series. Therefore, protective coatings or finishes are often recommended in certain environments.
Machinability: This alloy can be machined, but care must be taken to prevent cracking due to its high strength and potential brittleness under specific conditions.

7150 aerospace aluminum sheet chemical composition

Element	Composition(%)
Al	Rest
Zn	5.6%-6.3%
Mg	1.9%-2.6%
Cu	1.2%-2%
Mn	0.15%-0.4%
Cr	0.18%-0.28%

7150 aerospace aluminum sheet mechanical property

Below is a comparison table of the mechanical properties of 7150 aluminum alloy in T7751 and T6151 conditions:

Performance Parameters	T7751 (Solution heat treated, stress-relieved by stretching, artificial over-aging)	T6151 (Solution heat treated, stress-relieved by stretching)
Ultimate Tensile Strength	570 - 590 MPa	500 - 530 MPa
Yield Strength (0.2% offset)	500 - 530 MPa	460 - 490 MPa
Elongation at Break	9% - 11%	12% - 14%
Shear Strength	≈ 450 MPa	≈ 420 MPa
Hardness	140 - 160 HB	120 - 140 HB

Key Differences:

T7751 provides higher ultimate tensile strength and yield strength, with excellent exfoliation corrosion resistance, making it suitable for aerospace structures with high strength and corrosion resistance requirements.
T6151 has higher elongation, making it suitable for applications that require better formability, though it has relatively lower corrosion resistance.

7150 T7751 Aircraft Aluminum Plate

Processing: T7751 refers to the aluminum alloy state that has undergone special heat treatment and aging, usually providing higher tensile and yield strength, thereby enhancing the mechanical properties and corrosion resistance of the material.
Characteristics: In the T7751 condition, 7150 aluminum alloy exhibits extremely high strength and good toughness, making it suitable for applications that endure high loads and impacts.

The 7150 T7751 Aircraft Aluminum Plate maintains good performance in high-temperature and high-pressure environments, making it suitable for aircraft engine components and high-stress applications.

7150 T77511 Aircraft Aluminum Plate

T77511 is similar to T7751, undergoing solution heat treatment and stress relief by controlled stretching, followed by artificial over-aging to achieve excellent exfoliation corrosion resistance. The product does not require further straightening after stretching but may undergo slight straightening to meet standard tolerances.

7150 T6151 Aircraft Aluminum Plate

Characteristics: T6151 has slightly lower strength but still offers good corrosion resistance and machinability.
Applications: Suitable for structural components, casings, and other parts in aerospace, transportation, and similar fields.

7150 T61511 Aircraft Aluminum Plate

T61511 is similar to T6151, undergoing solution heat treatment and stress relief by controlled stretching (with permanent deformation of the plate ranging from 0.5% to 3%, and thick plates from 1.5% to 3%), followed by under-aging to enhance formability. The product does not require further straightening after stretching but may undergo slight straightening to meet standard tolerances.

What is 7150 aluminium alloy used for?

1. Fuselage Components: Such as fuselage skin, frames, and supporting structures, the high strength of 7150 aluminum alloy ensures the stability and safety of the fuselage during flight.
2. Wing Skin: The wing is one of the most critical structures of an aircraft; the lightweight characteristics and strength of 7150 aluminum alloy make it an ideal material for wing skins, helping to improve the aircraft's lift and flight performance.
3. Wing Spars and Supporting Structures: Wing spars are the main load-bearing structures of the wings; using 7150 aluminum alloy ensures that the spars have sufficient strength and stiffness when bearing flight loads.
4. Other Critical Components: Including landing gear supports, engine mounts, etc., these components need to withstand significant mechanical stress, and the excellent properties of 7150 aluminum alloy can meet these requirements.

Comparison with Other Alloys

Compared to 7075: 7150 generally has better fracture toughness than 7075, making it more popular in certain applications.
Compared to 6061: While 6061 is more versatile and easier to weld, 7150 offers higher strength.

What is the difference between 7150 and 7075 aluminum?

Below is a comparison table of the differences between 7150 aluminum alloy and 7075 aluminum alloy:

Characteristics	7150 Aluminum Alloy	7075 Aluminum Alloy
Strength and Toughness	Provides better corrosion resistance, especially in exfoliation corrosion and stress corrosion cracking.	Offers very high strength but is more susceptible to stress corrosion cracking than 7150.
Application Areas	Commonly used in large aerospace structural components where a balance of strength and corrosion resistance is required, such as wing structures and fuselage frames.	Primarily used in components requiring high strength-to-weight ratio and durability, such as aircraft wings, fuselage, military equipment, and high-performance sports equipment.
Alloy Composition	Contains a higher proportion of copper, providing better corrosion resistance.	Primarily alloyed with zinc, but has a lower copper content.
Heat Treatment Condition	Can be used in higher strength states (e.g., T77x) with a focus on enhancing corrosion resistance.	Typically in T6 condition, offering extremely high strength but weaker corrosion resistance.
Corrosion Resistance	Better than 7075, especially in exfoliation corrosion and stress corrosion cracking.	Although it offers high strength, it has relatively weaker corrosion resistance and is more susceptible to stress corrosion.

What is the strongest aircraft aluminum?

The strongest aircraft aluminum is typically 7075 aluminum alloy. 7075 aluminum alloy is known for its high strength and good corrosion resistance, commonly used in aerospace and military applications. It primarily consists of elements like lead, zinc, magnesium, and copper, and after heat treatment, its strength can reach very high levels.

Although 7075 aluminum alloy is extremely strong, in some applications, other types of aluminum alloys, such as 6061, may be chosen for their better machinability and weldability. The specific choice of aluminum often depends on the specific requirements and environmental conditions of the application.

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