Aluminum alloys combine lightweight properties with high strength and play a key role in modern engineering. Among these alloys, 7075 aluminum is a remarkable material due to its impressive composition and properties. In this article, we'll take a closer look at the composition and properties of 7075 aluminum alloy, as well as its many applications.
Learn what 7075 aluminum alloy is
7075 is a cold-treated and forged aluminum alloy that offers superior strength compared to conventional steel. It is considered one of the strongest aluminum alloys used in commercial applications. 7075 aluminum alloy has a dense structure and strong corrosion resistance, making it particularly suitable for aerospace and marine applications. Its general corrosion resistance, excellent mechanical properties, anodic reaction, etc. make it highly sought after. Additionally, its fine-grained structure enhances deep hole drilling performance and resistance to tool wear.
Main alloying elements
The main alloying element in 7075 aluminum is zinc. Compared to aluminum-zinc binary alloys, magnesium is added to alloys containing 3% to 7.5% zinc to form 3% to 7.5%. Increased zinc and magnesium content in the alloy further increases its tensile strength but may reduce its stress corrosion and peel corrosion resistance. After heat treatment, extremely high strength properties can be obtained. Typically, small amounts of copper, chromium, and other alloys are added to 7075 aluminum. Among these changes, 7075-T651 aluminum alloy stands out and is often called the best aluminum alloy product. It offers high strength, with a considerable margin over conventional steel. The alloy also has excellent mechanical properties and anodic reaction. Typical applications include aerospace, mold processing, machine equipment and fixture tooling, particularly in the production of high-strength and corrosion-resistant aircraft structures and other high-stress components.
Characteristics of 7075 aluminum alloy
7075 aluminum alloy is a cold-processed alloy known for its high strength and hardness, exceeding that of ordinary steel. It has general corrosion resistance, excellent mechanical properties and anodic reaction. Its fine-grained structure enhances deep hole drilling performance, increases resistance to tool wear and promotes thread rolling. This makes it a first choice for applications that require low density and high hardness of metallic materials.
