What’s the difference between 6061 aluminum and 7075 aluminum?

Definition

6061 Aluminum: It belongs to 6000 series aluminum, the main alloy elements are magnesium and silicon, with medium strength, good corrosion resistance, weldability, good oxidation effect. Widely used in a variety of industrial structures requiring a certain strength and high antibacterial corrosion. It is the most common aluminum, light, good strength, and affordable.

7075 Aluminum: It is a cold-treated forging alloy with high strength, which is much better than mild steel. 7075 is one of the strongest commercial alloys. 7075 aluminum alloy has compact structure and strong corrosion resistance, which is the best for aviation and marine plates. General corrosion resistance, good mechanical properties and anodic reaction. Fine grains make the performance of deep drilling better and the wear resistance of tools enhanced. It is the lightest and strongest aluminum material.

Composition

6061 Aluminum: Aluminum alloy 97.9%, magnesium 1%, silicon 0.6%, plus 0.28% copper and 0.2% (Chromium).

7075 Aluminum: The composition of aluminum alloy consists roughly of 5.6-6.1% 2.1-2.5% zinc, 1.2-1.6% copper, less than half a percentage point, silicon, iron, manganese, titanium, chromium, and other metals. It usually produces several grades of hot temper, 7075-O,7075-T6,7075-T651.

Hardness

6061 Aluminum: hardness can reach to 90HB.

7075 Aluminum: hardness can reach to 150HB.

Series

6061 Aluminum: belongs to 6000 series aluminum alloy.

7075 Aluminum: belongs to 7000 series aluminum alloy, it is zinc magnesium aluminum alloy.

Application

6061 Aluminum: because of the price, 6061 can be used in all kinds of places where aluminum alloy is not required.

7075 Aluminum: commonly used in aerospace, commercial applications requiring high hardness and low density, so 7075 is usually used as a commercial aluminum alloy.

Price

6061 Aluminum: It is the most common aluminum, light, strong and economical.

7075 Aluminum: It is the lightest and highest strength aluminum, the price is also more expensive.

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