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Difference in hardness and density between 6061 aluminum plate and 2A12 aluminum

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2019-03-09 15:33

6061 aluminum plate and 2A12 aluminum plate are commonly used aluminum plates, all of which are heat treatable aluminum alloys. After heat treatment, the two are difficult to distinguish from the appearance. Because the prices of the two are very different, even more than 10,000 yuan / ton, so many markets The dealer used the 6061 aluminum plate to pretend to sell 2A12 aluminum plates. If you can't tell the difference, it will bring huge economic losses to the company. The following Mingtai Aluminum teaches you how to distinguish between the two aluminum plates.

6061 aluminum coils

First, the use is different

6061 aluminum plate: It is an Al-Mg-Si alloy, medium strength, good plasticity and excellent corrosion resistance. In particular, it has a tendency to crack without stress corrosion, has excellent weldability, good corrosion resistance and cold workability, and is a promising alloy with a wide range of applications. It can be anodized and colored, or it can be painted on the enamel, suitable for building decoration materials. It contains a small amount of Cu, so the strength is higher than 6063, but the quenching sensitivity is also higher than 6063. After quenching, wind quenching cannot be achieved, and re-solution treatment and quenching aging are required to obtain higher strength.

2A12 aluminum plate: It is a kind of high-strength hard aluminum, which can be heat-treated and strengthened. It has medium plasticity in annealing, quenching and hot state. It has good spot welding and good tendency to form intergranular cracks when using gas welding and argon arc welding. Alloy The quenching and cold work hardening performance is good, and it is not good in the annealed state. Commonly used in aircraft structures, rivets, missile components, truck hubs, propeller components and other structural components.

Second, the hardness is different

The hardness of 6061 aluminum plate after heat treatment is about 90HB, while the hardness of 2A12 aluminum plate can reach 120HB. 2A12 belongs to ultra-high strength aluminum alloy, which is also a high-end product in aluminum plate.

Third, the density is different

The density of the 6061 aluminum plate is 2.7, while the 2A12 aluminum plate has a high copper content and a density of 2.78-2.79, and the product density can be calculated by weight.

Fourth, different production requirements

At present, there are not many manufacturers that can produce 2A12 aluminum plates in China. Mingtai Aluminum is one of the few private aluminum processing enterprises that can produce 2A12 aluminum plates. The processing technology of the 6061 aluminum plate is relatively low, and can be produced by almost all manufacturers.