Knowledge

While less versatile than 6061, 7075 aluminum plate does offer many specific benefits that can be preferable for the right applications. The main difference is that 7075aluminum plate is stronger. It offers upgrades both in terms of overall strength and strength-to-weight ratio compared with 6061. Other benefits include resistance to stress-corrosion cracking, good fatigue strength and decent machinability.

The main alloying agent of this aluminum is zinc. Its properties include a tensile strength of 83,000 psi, yield strength of 74,000 psi, Brinell hardness rated at 150, and an elongation at break of 10%. Its shear strength is 48,000 psi, with a thermal conductivity of 130 W/m-K and a strength to weight ratio of 196 kN-m/kg.

Potential drawbacks include less corrosion resistance than other alloys, poor weldability and cost. 7075 aluminum plateis more expensive than 6061, and thus is mainly used when its improved strength is a necessity. It also offers excellent hardness that allows it to handle a great deal of friction.

Because of its cost, 7075 aluminum plate is most commonly found in premium applications in the aerospace, marine and transportation industries. Other examples include high-end bicycle components, molds, airframes, and military-grade rifle receivers.

6061 is extremely adaptable and can be found in many more industries, while 7075 aluminum plate is most commonly selected where strength is of the utmost importance.