7071aluminum

7071 aluminum is a commonly used aluminum alloy material with excellent mechanical and process performance. The execution standard of 7071 aluminum is GB/T3190-2008. According to the standard, the chemical composition range of 7071 aluminum is as follows: silicon (Si) content is 0.4%~0.8%, magnesium (Mg) content is 0.8%~1.3%, zinc (Zn) content is 5.1%~6.1%, copper (Cu) content is 1.2%~2.0%, lead (Pb) content is not more than 0.05%, tin (Sn) content is not more than 0.05%, cadmium (Cd) content is not more than 0.005%, other element content is not more than 0.05% for each element, and the total content is not more than 0.15%. Aluminum (Al) is the balance.

The mechanical properties of 7071 aluminum are excellent. Its hardness reaches HB160, yield strength is 520MPa, tensile strength is 560MPa, elongation is 12%, and fracture elongation is 16%. These properties make 7071 aluminum widely used in aerospace, military, automotive, and machinery manufacturing.

7071 aluminum has good heat treatment performance, and the material's strength and hardness can be improved through heat treatment. At the same time, 7071 aluminum has excellent corrosion resistance, especially to chloride and sulfate corrosion.

However, 7071 aluminum also has some drawbacks. First, the material cost is high because it contains a higher proportion of copper and zinc elements. Second, the thermal expansion coefficient of 7071 aluminum is relatively large, which can cause thermal stress and require appropriate heat treatment and design.

The most common forms of 7071 aluminum are sheet, rod, profile, and tube, among which the sheet is often used in aerospace and automotive manufacturing, the rod and tube are used in machinery manufacturing, and the profile is used in construction and decoration fields.

In different countries' standards, 7071 aluminum has different equivalent grades. For example, the American grade is 7071-T651, the Chinese grade is YD7071-T651, and the Japanese grade is 7071-AIZn5.5MgCu. These grades have some differences in chemical composition and mechanical properties requirements, but generally have a high degree of similarity.

In conclusion, 7071 aluminum is an aluminum alloy material with excellent mechanical and process performance. It is widely used in aerospace, military, automotive, and machinery manufacturing. Although 7071 aluminum has a high cost and a relatively large thermal expansion coefficient, its excellent mechanical properties and corrosion resistance make it an important aluminum alloy material.

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• We pride ourselves on our ability to deliver high-quality Hard Aluminum products and services.
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