Aluminum can be crafted into several different alloys and tempers. Each alloy possesses specific characteristics, making it a more versatile material. There are certain alloys that have strength comparable to steel while others are malleable and easy to form. It is important to understand the alloy and temper of aluminum to select the best material for a specific project. If you need a strong alloy that is machinable, 7075 T651 aluminum is one of the best choices.
Different classes of 7075 alloy
These particular kinds of aluminum we are speaking about belong to the 7075 class of alloys. This class of alloy is formulated with zinc, copper, and magnesium. The class is known for its strength, which is comparable to steel. It is an alloy that is easy to machine and capable of being manipulated for different uses. The 7075 class is divided into tempering methods. There are several tempers for the 7075 class of aluminum alloy.
7075-0 – No temper or heat treatment
7075-T6 – Tempered with homogenizing, quenching and aging
7075-T7 – Tempered with an overaging process
7075-RRA – Retrogression and re-aging temper multiple stage process
7075-T651 Heat treated temper with a tensile strength of 570 MPA or 83,000 psi
Characteristics of 7075 T651 Aluminum
This alloy and temper results in a super strong aluminum that is as strong as steel. It is used in applications that endure high stress or weight loads. It is commonly used in transport vehicle construction. It is a favorite amongst the aerospace industry. It is also commonly used to create marine vehicles.
The alloy is fabricated in several forms such as extrusions, plates, and sheets. The alloy is also fabricated in round, square, and hexagon shaped bars. The strength of this aluminum alloy is diminished in the plate form.
This specific alloy is tempered in a process that enhances strength. It is first heat treated. It then goes through a stress relieving process that involves stretching the material. Finally, it is artificially aged through curing. This multiple step process is specific to this temper classification, created to maximize the strength of the alloy.
This alloy is not designed for welding, or to be formed. Welding, specifically arc welding, will weaken the anti-corrosive properties of the material. This material is very strong and designed to resist warping, making it a horrible choice if you are looking for a malleable aluminum. It is, however, designed for many different methods of machining and possesses decent abilities to resist corrosion.
