How to Choose Aluminium Profiles: 7075T6 VS 6061T6

Fonnov Aluminium 6061 vs 7075

Some industrial plant clients often ask questions about the selection of 7075 and 6061. FONNOV ALUMINIUM now introduces the comparison of the 7075T6 and 6061T6 that customers often mention, hoping to help your industrial design for production.

6061T6 FONNOV ALUMINIUM1
7075T6 FONNOV ALUMINIUM1

Different Ingredients

Zinc is as the main alloy of 7075 aluminum alloy.

Magnesium and Silicon are the main alloys of 6061 aluminum alloy.

ALUMINIUM ALLOY Si Fe Cu Mn Mg Cr Zn Ti Others AL
7075 0.4 0.5 1.2-2.0 0.3 2.1-2.9 0.18-0.28 5.1-6.1 0.2 each total
0.05 0.15 REST
6061 0.4-0.8 0.7 0.15-0.4 0.15 0.8-1.2 0.04-0.35 0.25 0.15 0.05 0.15 REST

From the above table, we can clearly see that the 7075 aluminum alloy is with much higher alloys in all aspects than the 6061 aluminum alloy.

Different Strength and Hardness

The 6061 aluminum contains more aluminum than the 7075 aluminum, so its mechanical properties will be lower than 7075. More pure aluminum, softer the aluminum alloy, because pure aluminum is a very soft metal element.

In general, we have different methods for measuring the strength of metals. There are three most commonly used methods to measure the strength of aluminum alloys. It is the measurement for Yield Strength, Shear Strength, and Tensile Strength. The following are the data of the strength measurement of aluminum alloys of 6061 and 7075:

ALUMINIUM ALLOY Yield Strength Shear Strength Tensile Strength
6061 7KSI 10KSI 13KSI
7075 15KSI 22KSI 33KSI

Aluminium alloy temper, which can change the characteristics of the metal itself to become another material with completely different mechanical properties. In addition, another way to increase the overall strength of aluminium alloy is what we called “heat treatment.” Generally, the “quenching” we often hear is a kind of “heat treatment”. It is to increase the strength of the aluminum alloy after it is heated at a high temperature and then rapidly cooled.

We often see aluminum alloys treated with “T6″ heat treatment. After the T6 heat treatment of 6061 aluminum alloy can greatly enhance the Yield Strength and Tensile Strength of the aluminum alloy. And the 7075-T6 heat-treated aluminum alloy also has a large increase in Yield Strength”, Tensile Strength and Shear Strength.

ALUMINIUM ALLOY TEMPER Yield Strength Shear Strength Tensile Strength
6061 7KSI 10KSI 13KSI
6061 T6 31KSI 17KSI 35KSI
ALUMINIUM ALLOY TEMPER Yield Strength Shear Strength Tensile Strength
7075 15KSI 22KSI 33KSI
7075 T6 73KSI 48KSI 83KSI

After the T6 heat treatment, the hardness is different. 7075T6 is a high hardness aluminium alloy, so it is very difficult to weld and fabricate.

ALUMINIUM ALLOY HARDNESS                HBW
6061T6 ≥95
7075T6 ≥150

Different Application And Price

7075T6 is the lightest and strongest aluminum alloy, so its price is expensive.

6061T6 is the most common aluminum alloy for industrial production, It is light, strong, and economical.

7075 contains a high proportion of other metals, so welding and fabrication are all very difficult. Since 6061 has a low proportion of other metals, it can increase its strength by various methods and treatments, so the application range is much wider. The sales and usage rate of 6061 in the market is relatively high compared to 7075. Usually 6061 is the highest-selling industrial aluminum alloy material, because its performance is basically consistent with various industrial applications such as machining and equipment processing. In addition, the factory’s production and processing costs for the 6061 are relatively low, so the supply and usage of the 6061 are relatively large. Since the price of the 7075 is relatively high, it is generally used for aluminum alloy for aviation and aircraft.

By | 2019-02-24T07:26:08+00:00 February 24th, 2019|Aluminium Industry|0 Comments
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