By Jessie | 14 October 2020 | 0 Comments

Aluminum Alloy Classification

                                                          Aluminum Alloy Classification

                                                                                                   before reading this article, please forgive my English my not very professional.

For now aluminum is very popular use in our daily life. they are  7 series of aluminum alloys commonly used. analyze the characteristics of each series of aluminum alloys below.  


1 series

1.Containing more than 99.00% of aluminum, standard material:  1050/1060/1010 

2.Characterized by good electrical conductivity, good corrosion resistance, good welding performance, and low strength (we all know that pure aluminum is soft), and it can not be heat-treated.
3.Applications: High-purity aluminum (more than 99.9% aluminum) is mainly used in scientific experiments, chemical industry, and special applications.
4.Process simple than cheap.  


2 series

1. Among them, the content of copper is the highest, which is about 3-5%. 2××× series aluminum plates are aviation aluminum materials, which are not often used in conventional industries at present. Standard material: 2A16(LY16)、2A06(LY6)

An aluminum alloy containing copper as the main combination element. Manganese, magnesium, lead, and antimony are also added to improve machinability. Yesterday, copper was said to improve the hardness and machinability of the alloy. Such as the 2011 alloy, pay attention to safety protection during the melting process (will produce harmful gases). The 2014 alloy is used in the aerospace industry with high strength. The 2017 alloy is a little weaker than the 2014 alloy, but it is easier to process. 2014 can be heat treated and strengthened. Disadvantages: The tendency of intergranular corrosion is serious. Applications: Aviation industry (2014 alloy), screws (2011 alloy) and industries with higher temperature (2017 alloy).

3 series

1. 3××× series aluminum sheet: mainly represents 3003, 3004, and 3A21.
2. 3××× series aluminum plate is made of manganese as the main component, and the content is between 1.0-1.5%. It is a series with better anti-rust function. It is commonly used in humid environments such as air conditioners, refrigerators, and under cars. The price is higher than the 1××× series. It is a more commonly used alloy series.
3. It can also be called an anti-rust aluminum plate.​​​​​​​ 
Aluminum alloy with manganese as the main alloying element, it cannot be heat-treated and strengthened, has good corrosion resistance, good welding performance and good plasticity (close to super-aluminum alloy). Disadvantages: low strength, but can be strengthened by cold work hardening. It is easy to produce coarse crystal grains during annealing. Applications: Oil-conducting seamless pipes (3003 alloys) and cans (3004 alloys) used on aircraft.

4 series

1.4××× series aluminum plate: representative is 4A01.
2.4××× series aluminum plates belong to the series with the higher silicon content. Usually, the silicon content is between 4.5-6.0%. It belongs to construction materials, mechanical parts, forging materials, and welding materials; low melting point, good corrosion resistance
3.Product description: It has the characteristics of heat resistance and wears resistance

4.Silicon is the main alloying element and is not commonly used. Part 4 is heat treatable, but some 4 series alloys do not heat treatable.

5 series

Magnesium is the main alloying element. It is characterized by tolerability, weldability, and fatigue strength, but it can not be heat-treated and can only be cold worked to increase strength. Applications: lawn mower handles, aircraft fuel tank conduits, body armor, etc.

1.5××× series aluminum plates: on behalf of 5052, 5005, 5083, 5A05 series.
2.The 5××× series aluminum plate belongs to the more commonly used alloy aluminum plate series, the main element is magnesium, and the magnesium content is between 3-5%. It can also be called an aluminum-magnesium alloy. The main features are low density, high tensile strength and high elongation.  In the same area, the weight of the aluminum-magnesium alloy is lower than the other series. So it is often used in aviation, such as aircraft fuel tanks. It is also widely used in conventional industries. The processing technology is continuous casting and rolling, which belongs to the hot-rolled aluminum plate series, so it can be used for oxidation deep processing. In my country, the 5××× series aluminum plate is one of the more mature aluminum plate series.


6 series

Magnesium and silicon are the main alloying elements. Mg2Si is the main strengthening phase and is currently the most widely used alloy. 6063, 6061 are the most used, most of our common building doors and windows, curtain walls, industrial aluminum profiles are 6063 aluminum profiles. Others 6082, 6160, 6125, 6262, 6060, 6005, 6463. 6063, 6060, and 6463 have relatively low strength in the 6 series. 6262, 6005, 6082, 6061 are relatively strong in the 6 series. Characteristics: medium strength, good corrosion resistance, good welding performance, good process performance (easy extrusion). Good oxidation and coloring effect. Applications: Building doors and windows, curtain walls, industrial equipment frames, accessories, solar borders, etc.

6××× series aluminum sheet: represents 6061. It mainly contains two elements of magnesium and silicon, so the advantages of 4××× series and 5××× series are concentrated. 6061 is a cold-treated aluminum forging product, suitable for applications with high requirements for corrosion resistance and oxidation. Good usability, excellent interface characteristics, easy coating, good processability, . It can be used on low-pressure weapons and aircraft joints.​​​​​​​

7 series

Mainly zinc, but sometimes a small amount of magnesium and copper are added. Among them, the super-hard aluminum alloy contains zinc, lead, magnesium and copper alloy, and the hardness is very large, which is close to just now. 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 heat treated and strengthened. Applications: Aviation (aircraft load-bearing components, landing gear), rockets, propellers, airships.

7××× series aluminum sheet: represents 7075. Mainly contains zinc. It also belongs to the aviation series. It is an aluminum-magnesium-zinc-copper alloy, a heat-treatable alloy.  is a super-hard aluminum alloy with good wear resistance. 7075 aluminum plate is stress-relieved and will not deform or warp after processing. All super large and super thick All 7075  aluminum plates are ultrasonically detected, which can ensure no blisters and impurities. 7075 aluminum plates have high thermal conductivity, which can shorten the forming time and improve work efficiency. The main feature of is that the hardness of 7075 is a high-hardness, high-strength aluminum alloy, which is often used to make airplanes.


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