6061 vs 7075 aluminum

6061 and 7075 belong to the same aluminum alloy, with similar properties, but the difference is very big. 6061 belongs to 6000 series aluminum alloy, while 7075 belongs to 7000 series aluminum alloy. Today, the editor of Mingtai will analyze the difference between 6061 vs 7075 aluminum alloy. Because most of the materials of 6061 and 7075 are T6 temper, the data in this article are based on the typical values ​​of 6061-T6 and 7075-T6.

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Aluminum 6061 vs 7075 alloy composition comparison

The trace elements of 6061 are mainly Mg and Si and form the Mg₂Si phase. A small amount of copper or zinc is added to increase the strength of the alloy without significantly reducing its corrosion resistance.6061-chemical-composition

7075 has a high proportion of trace elements and high cost. The main element is zinc. Adding copper and magnesium to form Al-Zn-Mg-Cu alloys has the largest strengthening effect among all aluminum alloys.

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6061 vs 7075 weight comparison

Theoretically, the density of 6061 and 7075 is basically the same, but due to the difference in alloy composition, the density will be within 5 thousandths of a difference, so the weight difference is not too big when the volume of 6061 and 7075 are the same.

6061 vs 7075 strength comparison

In terms of strength, 6061 has a lower hardness and tensile strength. The lower hardness makes it easier to process than 7075. The lower tensile strength means that 6061 is easier to form than 7075. Although both materials can be joined by welding, brazing, or adhesives, 6061 is weldable and 7075 is generally considered non-weldable.

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Comparison of processing performance

In terms of machinability, both can be milled well on CNC machine tools. 6061 can be welded, 7075 is difficult to weld. 6061 aluminum sheet can be more convenient for surface treatment such as oxidation coloring, but 7075 has an unstable oxidation effect. When the two are not treated, 6061 has better corrosion resistance. The 6061 and 7075 materials have high hardness and cannot be bent.

6061 vs 7075 aluminum application field comparison

6061 can basically meet the general industrial manufacturing requirements. And 7075 is used in demanding occasions, such as aerospace, military products, precision equipment, high-end electronic equipment, high-end products, etc.

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6061 vs 7075 price comparison

Under normal circumstances, the price of 7075 is about 20-40% more expensive than 6061.

Final overview

6061 and 7075 belong to the same aluminum alloy, and their performance is similar, but there are differences. The difference is basically included in the above content, so when looking for 6061 vs 7075 aluminum information, you will know a lot. Although the performance of 7075 is superior to that of 6061, I have to consider it comprehensively in practical applications, combining your use and budget.