What Are Properties and Uses of Aluminium 7000 Series

 The yield strength of aluminum 7000 series is usually between 300-500MPa, which can effectively resist deformation caused by external loads. The alloy has good heat treatment properties and corrosion resistance. Heat treatment can significantly increase its strength and hardness while improving its corrosion resistance.

7 series aluminum alloys are widely used in the manufacture of aircraft structural parts and other parts requiring high strength, such as engine parts, landing gear, seats, etc. In addition, 7 series aluminum alloy can also be used to manufacture other mechanical parts that require high strength, high hardness and wear resistance, such as gears, shaft parts, etc.

Matweb aluminum 7075 is one of its main grade. It can be used in the aerospace industry, blow molding (bottle) molds, ultrasonic plastic welding molds, golf ball heads, shoe molds, paper molds, foam molding molds, dewaxing molds, templates, fixtures, mechanical equipment, aluminum alloy bicycle frame.

7075 aluminum's medium and thick plates, extrusions, free forgings and die forgings are used for the aircraft structural parts. The requirements for alloys in manufacturing such parts are high resistance to spalling corrosion, stress corrosion cracking, fracture toughness and fatigue resistance.

Features of 7000 aircraft aluminum alloys

High strength: The strength of 7 series aluminum alloy is much better than that of mild steel. Its main alloying elements are zinc and magnesium. The MgZn2 structure formed by zinc and magnesium has obvious strengthening effect, making the heat treatment effect of 7 series aluminum plates far better than other aluminum plates. As the zinc and magnesium content increases, the strength of the aluminum plate will further increase. Especially when the temperature is lower than 150℃, the performance is better.

High mechanical properties: 7 series aluminum alloys have excellent mechanical properties, including high strength, hardness and good plasticity. Due to the small and even distribution of internal crystals, the 7 series aluminum plate has super wear resistance, and its high level of drilling performance is also rare. These properties make it suitable for manufacturing aircraft parts that need to withstand heavy loads and high-speed movements.

Strong corrosion resistance: 7 series aluminum alloy can resist corrosion and oxidation when exposed to the atmosphere. It has good resistance to stress corrosion and spalling corrosion, and performs well in the processing of high-stress structural parts. This makes it suitable for aircraft components in marine environments and other corrosive environments.

Easy to process: 7000 aluminum alloys can be processed into parts of various shapes and sizes through various processing methods such as casting, forging, extrusion and rolling, which can meet the strict requirements of aircraft manufacturing.

Lightweight: Because 7xxx aluminum alloy has high strength and hardness and relatively low density, it is suitable for manufacturing lightweight aircraft parts, helping to improve the fuel efficiency and performance of aircraft.

Good thermal conductivity: 7 series aluminum alloy has good thermal conductivity and can effectively transfer heat. It is suitable for manufacturing aircraft parts that need to withstand high temperatures and dissipate heat.

Disadvantages: Adding zinc and magnesium elements can improve the strength of 7 series aluminum plates. However, with the increase of zinc and magnesium elements, the resistance to stress corrosion and spalling corrosion of 7 series aluminum plates will also decrease. It should be noted that the 7 series aluminum alloy has a higher hardness and is more difficult to process, requiring fine machining and heat treatment operations.

Haomei Aluminum has different grades of 7000 aluminum alloys like matweb aluminum 7075 and 7050 aluminum alloy. Welcome to leave message below to inquire what you need.

Original Source:https://www.aircraftaluminium.com/a/what-are-properties-and-uses-of-aluminium-7000-series.html

Aluminum 7075 Material Properties

 7075 aluminum sheet is a commonly used grade in the 7xxx aluminum alloys. Zinc is its main alloying element. The addition of magnesium to the alloy containing 3%-7.5% zinc can form MgZn2 with a significant strengthening effect, so that the heat treatment effect of 7075 aluminum is far better than that of the aluminum-zinc binary alloy.

Aluminum plate 7075 is used to manufacture a variety of structural parts, especially aerospace structural parts. It is the most widely used high-strength aluminum alloy today, ranging from the front fuselage truss of the C919 large aircraft to the mobile phone casing. What are aluminum 7075 material properties?

It is available in various heat treatment tempers: T6, T73, T76, T77. Through a large number of experimental data and theoretical analysis, on the basis of 7075-T6, the aging heat treatment process was used to successfully develop 7075-T73, which is resistant to stress corrosion. Although this material sacrifices part of its static strength, its corrosion resistance has been significantly improved.

Later, 7075-T76 was further developed, which not only obtained stronger corrosion resistance, but also sacrificed a lower static strength than 7075-T73, which improved the comprehensive properties of aluminum alloy materials and became the best corrosion-resistant aluminum alloy.

7075 alloy can be resistance welded, and the long-term working temperature of the workpiece is less than or equal to 125℃. For incomplete annealing of materials or workpieces, the specification is 290°C~320°C, and after holding for 2h~4h, it is air cooled. Complete annealing specification is (390~430)℃/(0.5~1.5)h and it should be cooled down to ≤200℃ with a cooling rate not greater than 30℃/h.

The solution treatment temperature of 7075 alloy sheet is 460℃~490℃, and the treatment temperature of aluminum sheet should be close to the lower limit, and the number of repeated treatments should not be more than 2 times, so as to prevent alloy elements from diffusing through the aluminum clad layer and reducing the corrosion resistance of the material.

AA7075 composition

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Zn	Zr	Ti	Standard
7075	0.40	0.50	1.2-2.0	0.30	2.1-2.9	0.18-0.28	5.1-6.1	-	0.20	GB/AMS/EN

Original source: https://www.aircraft-aluminium-sheet.com/a/aluminum-7075-material-properties.html

Race Car Aluminum Sheets 7075

 Aluminum alloy has become one of the preferred materials for automobile lightweight due to its high specific strength, good corrosion resistance, formability and weldability. In the automotive industry, automobile lightweight is one of the most important means of energy saving and emission reduction. Limited by the difficulty of sheet metal forming, the all-aluminum body realized by high-cost and low-efficiency sheet metal forming technology is mainly used in high-end sports cars, race cars and luxury cars.

After a long period of development, the most common aluminum alloy sheets used for automobile bodies are 2××× (Al-Cu-Mg) series, 5××× (Al-Mg) series, 6××× (Al-Mg -Si) alloys and 7××× (Al-Zn-Mg-Cu) aluminum alloys.

7075 aluminum sheet is an Al-Zn-Mg-Cu alloy, which can be heat-treated and strengthened. Among them, Zn and Mg mainly play the role of strengthening, and the role of Cu is mainly to improve the corrosion resistance of the alloy. 7075 aluminum plate is a superhard aluminum alloy with very good mechanical properties. The tensile and shear strength can reach more than 600, and the elongation rate can reach as high as 70%.

7075 aluminum alloy is widely used in aerospace and related fields, especially in the manufacture of aircraft structures and other high-stress structures that require high strength and strong corrosion resistance. In recent years, with the "consumption upgrade" and "lightweight" trend, 7075 aluminum has gradually extended from the traditional aerospace and military fields to the fields of mechanical equipment, mold processing, automobiles and even consumer electronics due to its ultra-high performance and practicability.

The main criterion for ultra-high-strength aluminum alloys is the so-called yield strength. 7075 aluminum alloy can be obtained in two tempers T6 and T7. In 7075-T6, a yield point of about 500MPa is reached, while for 7075-T7, the value is about 450MPa. A yield point of 450 to 500 MPa is already a very high value for aluminum alloys

Different parts of race cars have very different requirements for materials. For example, the front and rear parts of a car like front and rear longitudinal beams is required to absorb impacts from the front and rear. The area enclosed by strength and deformation can be roughly considered as the material's ability to absorb energy. Of course, we don't want these energy-absorbing parts to break prematurely during the collision, so a certain elongation is the basic requirement for these parts.

The second need is strength. The intensity should not be so strong that the main energy is transmitted backwards, nor so weak that it cannot absorb enough energy. Proper strength and good deformability are the requirements for these parts. 7000 race car aluminum sheets meets this requirements.

Original Source:https://www.autoaluminumsheet.com/a/race-car-aluminum-sheets-7075.html

Aluminum 7075 Material Properties

 7075 aluminum sheet is a commonly used grade in the 7xxx aluminum alloys. Zinc is its main alloying element. The addition of magnesium to the alloy containing 3%-7.5% zinc can form MgZn2 with a significant strengthening effect, so that the heat treatment effect of 7075 aluminum is far better than that of the aluminum-zinc binary alloy.

Aluminum plate 7075 is used to manufacture a variety of structural parts, especially aerospace structural parts. It is the most widely used high-strength aluminum alloy today, ranging from the front fuselage truss of the C919 large aircraft to the mobile phone casing. What are aluminum 7075 material properties?

It is available in various heat treatment tempers: T6, T73, T76, T77. Through a large number of experimental data and theoretical analysis, on the basis of 7075-T6, the aging heat treatment process was used to successfully develop 7075-T73, which is resistant to stress corrosion. Although this material sacrifices part of its static strength, its corrosion resistance has been significantly improved.

Later, 7075-T76 was further developed, which not only obtained stronger corrosion resistance, but also sacrificed a lower static strength than 7075-T73, which improved the comprehensive properties of aluminum alloy materials and became the best corrosion-resistant aluminum alloy.

7075 alloy can be resistance welded, and the long-term working temperature of the workpiece is less than or equal to 125℃. For incomplete annealing of materials or workpieces, the specification is 290°C~320°C, and after holding for 2h~4h, it is air cooled. Complete annealing specification is (390~430)℃/(0.5~1.5)h and it should be cooled down to ≤200℃ with a cooling rate not greater than 30℃/h.

The solution treatment temperature of 7075 alloy sheet is 460℃~490℃, and the treatment temperature of aluminum sheet should be close to the lower limit, and the number of repeated treatments should not be more than 2 times, so as to prevent alloy elements from diffusing through the aluminum clad layer and reducing the corrosion resistance of the material.

AA7075 composition

Alloy	Si	Fe	Cu	Mn	Mg	Cr	Zn	Zr	Ti	Standard
7075	0.40	0.50	1.2-2.0	0.30	2.1-2.9	0.18-0.28	5.1-6.1	-

Original source: https://www.aircraft-aluminium-sheet.com/a/aluminum-7075-material-properties.html

The Manufacturing Level of Aircraft Aluminum Sheet in China

 Aviation materials are the foundation for the development of the aviation industry and involve a large amount of global import and export trade. Due to the high demand for materials by aerospace parts manufacturers, the aerospace materials market in Asia-Pacific, Europe and North America has huge potential.

The aviation material including aircraft aluminum sheet are important technical guarantees for realizing advanced aircraft with high performance, light weight, high reliability, long life, and low cost. Based on the importance of aircraft materials,the world's aviation powers attach great importance to the development of aircraft materials.

At present, China has basically formed a relatively complete aviation material research and development technology system and mass production capacity, and has the ability to supply key materials for major aviation equipment. There are some typical ones.

2024 Aluminum Sheet

2024 T3 aluminum sheet is the most common high-strength aluminum alloy. 2024-T3 aluminum plate is of super high strength and excellent fatigue resistance. Welding is generally not recommended. The typical use is for fuselage, wing shells and aircraft structure.

6061 T6 Aluminum

It has very good corrosion resistance and finishing ability, and good welding performance. The strength level of 6061-T6 aluminum plate is equivalent to that of low carbon steel. Its typical uses are aircraft landing pads, truck bodies and frames, structural parts, etc.

7075 Aluminum Alloy

Aircraft manufacturers use high-strength alloys, 7075 aluminum alloy to strengthen aluminum aircraft structures. 7075 aluminum sheet belong to Al-Zn-Mg-Cu alloy for ultimate strength, but the copper content makes it very difficult to weld. On the other hand, it has good anodizing effect. Aluminum 7075 has the best machining performance and can achieve very good results.

Original Source:https://www.aircraftaluminium.com/a/the-manufacturing-level-of-aircraft-aluminum-sheet-in-china.html