The strength of aluminum plate compared to steel plate depends on various factors such as the alloy composition, heat treatment, and thickness of the material. Generally, steel is known for its higher tensile strength and yield strength compared to aluminum. However, aluminum has a higher strength-to-weight ratio, meaning it can provide comparable strength to steel while being lighter in weight.

In specific applications, such as aerospace and automotive industries, aluminum plates are often preferred over steel plates due to their lightweight nature and adequate strength properties. Additionally, aluminum plates offer excellent corrosion resistance, making them suitable for use in environments where steel may corrode more quickly.

Overall, while steel plates may have higher absolute strength values than aluminum plates, the choice between the two materials depends on the specific requirements of the application, including factors such as weight, strength, corrosion resistance, and cost.