7st series aluminum

①7000 series aluminum alloy is another commonly used alloy, with a wide variety of types. It contains zinc and magnesium. Among the common aluminum alloys, the one with the best strength is 7075 alloy, but it cannot be welded and its corrosion resistance is quite poor. Many CNC-cutting manufactured parts use 7075 alloy. Zinc is the main alloy element in this series. Adding a small amount of magnesium alloy enables the material to undergo heat treatment and achieve very high strength characteristics. This series of materials usually contain a small amount of copper, chromium, etc. Among them, the 7075 alloy with the number is particularly superior, having the highest strength and suitable for aircraft frames and high-strength components.

②7075 belongs to the Al-Zn-Mg-Cu series of super-hard aluminum. This alloy was already applied in the aircraft manufacturing industry in the late 1940s and is still widely used in the aerospace industry to this day as an ultra-high-strength wrought aluminum alloy. Its characteristics are that it has good plasticity after solution treatment, excellent heat treatment strengthening effect, high strength below 150℃, and particularly good low-temperature strength; poor welding performance; tendency to stress corrosion cracking; and requires aluminizing or other protective treatments for use. Two-stage aging can enhance the alloy’s ability to resist stress corrosion cracking. The plasticity under annealed and quenched conditions is slightly lower than that of 2A12 in the same state, slightly better than 7A04. The static fatigue and notch sensitivity of the sheet material are better than 7A04, and the stress corrosion performance is superior to 7A04.

• Common brand names:

7A01、7A03、7A04、7A05、7A09、7A10、7A15、7A19、7A31、7A33、7A52 、7003、7005、7020、7022、7050、7075、7475

• Such As

7005 Compression material, used for manufacturing welding structures that require both high strength and high fracture toughness, such as trusses, rods, and containers of transportation vehicles; large heat exchangers, as well as components that cannot undergo solidification treatment after welding; it can also be used to manufacture sports equipment such as tennis rackets and softball bats.

7039 Refrigeration containers, low-temperature equipment and storage boxes, fire-fighting pressure equipment, military equipment, armored plates, missile devices

7049 is used for forging parts with the same static strength as 7079-T6 alloy but with the requirement of having high resistance to stress corrosion cracking, such as aircraft and missile components – landing gear hydraulic cylinders and extruded parts. The fatigue performance of the parts is approximately equal to that of 7075-T6 alloy, while the toughness is slightly higher.

7050 Aircraft structural components made of medium-thick plates, extrusions, free forging pieces and die forging pieces. The requirements for alloys in manufacturing such parts are: high resistance to pitting corrosion, stress corrosion cracking resistance, fracture toughness and fatigue resistance.

7072 Air conditioner aluminum foil and ultra-thin sheet materials; 2219, 3003, 3004, 5050, 5052, 5154, 6061, 7075, 7475, 7178 alloy sheet and tube materials’ coating layers.

7075 is used for manufacturing aircraft structures and components. He requires high-strength and highly corrosion-resistant structural parts and molds for manufacturing.

7175 is used for forging high-strength structural parts for aircraft. The T736 material has excellent comprehensive properties, including high strength, resistance to pitting corrosion and stress corrosion cracking, high fracture toughness, and fatigue strength.

7178 is designed to provide components with high compressive yield strength for the manufacture of aerospace vehicles.

7475 Includes both aluminum-clad and non-aluminum-clad sheet materials for the fuselage, as well as wing frames, stringers, etc. Also includes other components that require both high strength and high fracture toughness.

7A04 Aircraft skin, screws, and stressed components such as main beams, stringers, spar frames, wing ribs, landing gear, etc.