Main uses of aluminum alloys
Because of its excellent physical properties, aluminum alloys has been widely used in various sectors of the national economy and national defense industry.
As a lightweight structural material, aluminum is light in weight and strong. Land, sea, and air vehicles, especially aircraft, missiles, rockets, satellites, etc., use a large amount of aluminum.
Various vehicles made of aluminum and aluminum alloys can reduce energy consumption due to their lightweight, and the energy saved far exceeds the energy consumed during aluminum smelting.
In the construction industry, aluminum alloy is used as the door, window, and structural material of the house, and solar energy collectors are made of aluminum, which can save energy.
In terms of power transmission, aluminum is the first to use, and 90% of high-voltage electrical wires are made of aluminum.
In the food industry, everything from warehouse storage tanks to cans to beverage containers is mostly made of aluminum.
In other aspects, aluminum powder is used as a reducing agent for refractory metals (such as molybdenum, etc.) and as a deoxidizer in the steelmaking process.
Pots, basins, spoons, etc. in daily life.
The international brand naming system for aluminum and aluminum alloys
Series 1: pure aluminum, aluminum content above 99.00%, good electrical conductivity, good corrosion resistance, good welding performance, low strength, not heat-treatable. Application range: high-purity aluminum (aluminum content above 99.9%) is mainly used in Scientific experiments, chemical industry, and special purposes.
2 Series: Aluminum alloy containing copper and Cu as the main element. Manganese, magnesium, lead, and bismuth are also added for machinability. Such as the 2011 alloy, pay attention to safety protection during the smelting process (hazardous gas will be generated). The 2014 alloy is used in the aviation industry with high strength. The 2017 alloy has a lower strength than the 2014 alloy, but it is easier to process. 2014 can be strengthened by heat treatment. The disadvantage is that the tendency of intergranular corrosion is serious. Mainly used in the aviation industry (2014 alloy), screws (2011 alloy), and industries with higher service temperatures (2017 alloy).
Series 3: The main alloying element is manganese Mn, which cannot be strengthened by heat treatment, has good corrosion resistance, good welding performance, and good plasticity. The disadvantage is that the strength is low, but it can be strengthened by cold work hardening, and it is easy to produce coarse grains during annealing. Mainly used for seamless oil pipes (3003 alloys) and cans (3004 alloys) on airplanes.
Series 4: The main alloying element is silicon Si, which is not commonly used. Some 4 series alloys can be strengthened by heat treatment, but some 4 series alloys cannot be heat treated.
Series 5: The main alloying element is magnesium Mg, which has good resistance performance, good welding performance, and good fatigue strength. It cannot be strengthened by heat treatment, and can only be cold-worked to increase the strength. Mainly used for the handles of lawnmowers, aircraft fuel tank ducts, and body armor.
Series 6: The main alloying elements are magnesium Mg and silicon Si. Mg2Si is the main strengthening phase and is currently the most widely used alloy. 6063, 6061 are most used, other 6082, 6160, 6125, 6262, 6060, 6005, 6463. The strength of 6063, 6060, and 6463 is relatively low in the 6 series. The 6262, 6005, 6082, 6061 have higher strength in the 6 series. It is characterized by medium strength, good corrosion resistance, good welding performance, good process performance (easy to be extruded and formed), and good oxidation and coloring performance. Mainly used for car luggage racks, doors, windows, car bodies, heat sinks, and compartment shells)
7 series: The main alloying element is zinc and Zn, but sometimes a small amount of magnesium and copper are added. Among them, super-hard aluminum alloys contain zinc, lead, magnesium, and copper alloys close to the hardness of steel. The extrusion speed is slower than that of the 6 series alloy, and the welding performance is good. 7005 and 7075 are the highest grades in the 7 series and can be strengthened by heat treatment. Application scope: aviation (plane’s load-bearing components, landing gear), rockets, propellers, aviation spacecraft.
Series 8: other elements
9 series: (spare alloy)
1XXX series means pure aluminum, the aluminum content is not less than 99.00%, and the last two digits mean two digits after the decimal point. The second digit indicates the control of the limit content of alloy elements or impurities. If the second digit is 0, it means that there is no special control on the limit content of impurities. If it is 1-9, it means that one or more items are individually controlled. The limit content of impurities or alloying elements is specially controlled.
The last two digits in the 2XXX-8XXX series have no special meaning and are only used to identify different alloys in the same group. The second digit indicates the modification situation, if the second digit is 0, it is expressed as the original alloy, and if it is 1-9, it is expressed as the modified alloy.
Aluminum alloys with different gold labels have different uses. The details are as follows:
1050 Extrusion coils for food, chemical, and brewing industries, various hoses, fireworks powder
1060 Where high corrosion resistance and formability are required, but the strength requirements are not high, chemical equipment is its typical use
1100 is used for processing parts that require good formability and high corrosion resistance but do not require high strength, such as chemical products, food industry equipment, and storage containers, thin plate processing parts, deep drawing or spinning concave vessels, Welding parts, heat exchangers, printed boards, nameplates, reflectors
1145 Packaging and insulation aluminum foil, heat exchanger
1199 Electrolytic capacitor foil, optical reflective deposition film
1350 wires, conductive strands, bus bars, transformer strips
2011 Screws and machined products requiring good cutting performance
2014 Used in occasions requiring high strength and hardness (including high temperature). Aircraft heavy-duty, forgings, thick plates and extruded materials, wheels and structural elements, multi-stage rocket first-stage fuel tanks and spacecraft parts, truck frames, and suspension system parts
2017 is the first 2-series alloy to obtain industrial applications. The current application range is relatively narrow, mainly for rivets, general mechanical parts, structural and transportation structural parts, propellers, and accessories
2024 aircraft structure, rivets, missile components, truck hubs, propeller components, and other various structural parts
2036 car body sheet metal parts
2048 Aerospace vehicle structural parts and weapon structural parts
2124 Aerospace Vehicle Structural Parts
2218 aircraft engine and diesel engine piston, aircraft engine cylinder head, jet engine impeller, and compressor ring
2219 Space rocket welding oxidant tank, supersonic aircraft skin, and structural parts, working temperature is -270~300 degrees Celsius. Good weldability, high fracture toughness, T8 state has high resistance to stress corrosion cracking
2319 Welding electrode and filler solder of 2219 alloy
2618 Die forgings and free forgings. Pistons and aero-engine parts
2A01 Structural rivets with working temperature less than or equal to 100 degrees Celsius
2A02 Axial compressor blades of turbojet engines with the operating temperature of 200~300 degrees Celsius
2A06 Rivets for aircraft structures with the operating temperature of 150-250 degrees Celsius and aircraft structures with the operating temperature of 125-250 degrees Celsius
The strength of 2A10 is higher than that of 2A01 alloy. It is used to manufacture aircraft structural rivets whose operating temperature is less than or equal to 100 degrees Celsius.
2A11 Medium-strength structural parts of aircraft, propeller blades, vehicles, and building structural parts. Medium-strength bolts and rivets for aircraft
2A12 Aircraft skins, bulkheads, wing ribs, wing beams, rivets, etc., construction and transportation tool structures
2A14 Free forgings and die forgings with complex shapes
2A16 Aerospace aircraft parts with a working temperature of 250~300 degrees Celsius, welding vessel and air-tight cockpit working at room temperature and high temperature
2A17 Aircraft parts with an operating temperature of 225~250 degrees Celsius
2A50 Medium-strength parts with complex shapes
2A60 aircraft engine compressor wheel, wind deflector, fan, impeller, etc.
2A70 Aircraft skins, aircraft engine pistons, wind deflectors, roulettes, etc.
2A80 aero-engine compressor blades, impellers, pistons, expansion rings, and other parts with high working temperature
2A90 Aero Engine Piston
3003 is used for processing parts that require good formability, high corrosion resistance, and good weldability, or work that requires these properties and requires higher strength than 1XXX series alloys, such as kitchenware, food, and chemical products processing And storage devices, tanks, and tanks for transporting liquid products, various pressure vessels, and pipes made of thin plates
3004 all-aluminum can body, requiring higher strength parts than 3003 alloys, chemical product production and storage devices, sheet processing parts, construction processing parts, construction tools, various lighting components
3105 Room partitions, baffles, movable house boards, gutters and downpipes, thin plate forming parts, bottle caps, bottle stoppers, etc.
3A21 aircraft fuel tanks, oil ducts, rivet wires, etc.; industrial equipment such as building materials and food
Similar to alloy 3003, 5005 has medium strength and good corrosion resistance. Used as conductors, cooking utensils, instrument panels, shells, and architectural decorations. The anodic oxide film is brighter than the oxide film on 3003 alloys and is in harmony with the color tone of the 6063 alloy
5050 thin plate can be used as the inner liner of refrigerators and refrigerators, automobile air pipes, oil pipes, and agricultural irrigation pipes; it can also process thick plates, pipes, bars, special-shaped materials, and wires, etc.
5052 This alloy has good forming performance, corrosion resistance, candle resistance, fatigue strength, and medium static strength. It is used to manufacture aircraft fuel tanks, oil pipes, and sheet metal parts of vehicles and ships, instruments, street lamp brackets and rivets, hardware products, etc.
5056 Magnesium alloy and cable sheath rivets, zippers, nails, etc.; aluminum-clad wires are widely used in the processing of agricultural insect trap covers, and other occasions where high corrosion resistance is required
5083 is used in occasions that require high corrosion resistance, good weldability, and medium strength, such as welded parts of ships, automobiles, and aircraft plates; pressure vessels, refrigeration devices, TV towers, drilling equipment, and transportation that require strict fire protection Transportation equipment, missile components, armor, etc.
5086 is used in occasions that require high corrosion resistance, good weldability, and medium strength, such as ships, automobiles, airplanes, cryogenic equipment, television towers, drilling equipment, transportation equipment, missile parts, and decks, etc.
5154 Welded structures, storage tanks, pressure vessels, ship structures, and offshore facilities, transportation tanks
5182 thin plates are used for processing can lids, automobile body panels, control panels, reinforcements, brackets, and other parts
5252 is used to manufacture high-strength decorative parts, such as decorative parts for automobiles. Bright and transparent oxide film after anodic oxidation
5254 Hydrogen peroxide and other chemical product containers
5356 Welding aluminum-magnesium alloy electrodes and wires with magnesium content greater than 3%
5454 Welded structures, pressure vessels, pipelines for marine facilities
5456 armor plates, high-strength welded structures, storage tanks, pressure vessels, ship materials
5457 Polished and anodized decorative parts for automobiles and other equipment
5652 Hydrogen peroxide and other chemical products storage containers
5657 Decorative parts of automobiles and other equipment that have been polished and anodized, but in any case, the material must be ensured to have a fine grain structure
5A02 aircraft fuel tanks and pipes, welding wires, rivets, ship structural parts
5A03 medium-strength welding structure, cold stamping parts, welding container, welding wire, can be used to replace 5A02 alloy
5A05 Welded structural parts, aircraft skin frame
5A06 Welded structure, cold die forging parts, stressed parts of welded pull container, aircraft skin, and bone parts
5A12 Welded structural parts, bulletproof deck
6005 extruded profiles and pipes, used for structural parts that require strength greater than 6063 alloys, such as ladders, TV antennas, etc.
6009 car body panel
6010 sheet: car body
6061 requires a variety of industrial structures with a certain strength, weldability, and high corrosion resistance, such as pipes, rods, shaped materials, and Plank
6063 Building profiles, irrigation pipes, and extrusion materials for vehicles, benches, furniture, fences, etc.
6066 Forgings and welding structure extrusion materials
6070 Heavy-duty welded structure and extrusion materials and pipes for the automotive industry
6101 High-strength bars, electrical conductors, and radiator materials for buses
6151 is used for die forging crankshaft parts, machine parts, and the production of rolled rings. It is used for applications that require good forge ability, high strength, and good corrosion resistance.
6201 High-strength conductive material and wire
6205 Thick plates, pedals, and high impact resistant extrusions
6262 Threaded high-stress parts requiring corrosion resistance better than 2011 and 2017 alloys
6351 Extruded structural parts of vehicles, pipelines for water, oil, etc.
6463 Building and various appliance profiles, as well as automotive decorative parts with bright surfaces after anodizing treatment
6A02 Aircraft engine parts, complex forgings, and die forgings
7005 Extruded material, used to manufacture welded structures that require both high strength and high fracture toughness, such as trusses, rods, and containers of vehicles; large heat exchangers, and no solid solution treatment after welding Parts; can also be used to make sports equipment such as tennis rackets and softball bats
7039 Freezer containers, cryogenic equipment, and storage boxes, fire-fighting pressure equipment, military equipment, armor plates, missile installations
7049 is used for forging parts that have the same static strength as 7079-T6 alloy and require high resistance to stress corrosion cracking, such as aircraft and missile parts-landing gear hydraulic cylinders and extrusions. The fatigue performance of the parts is roughly equal to that of 7075-T6 alloy, but the toughness is slightly higher
7050 Medium and heavy plates, extrusions, free forgings and die forgings for aircraft structural parts. The requirements for the manufacture of such parts for the alloy are: high resistance to spalling corrosion, stress corrosion cracking, fracture toughness, and fatigue resistance.
7072 air conditioner aluminum foil and ultra-thin strip; 2219, 3003, 3004, 5050, 5052, 5154, 6061, 7075, 7475, 7178 alloy plate and tube coating
7075 is used to manufacture aircraft structures and futures, which require high-stress structural parts and molds with high strength and strong corrosion resistance.
7175 is used for high-strength structural forging aircraft. T736 material has good comprehensive properties, that is, high strength, spalling corrosion resistance and stress corrosion cracking resistance, fracture toughness, and fatigue strength.
7178 Parts that require high compressive yield strength for the manufacture of aerospace vehicles
7475 Aluminum-clad and non-aluminum-clad plates for the fuselage, wing skeletons, stringers, etc. Other parts that must have both high strength and high fracture toughness
7A04 Aircraft skins, screws, and force-bearing components such as girder stringers, bulkheads, wing ribs, landing gear, etc.
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