Steel is not an elastic material, but it can be molded into an elastic structure. Steel is mostly made out of iron. Steel springs can be found in many vehicles, such as cars.

Steel springs are used in cars and in ball-point pens. Steel is not an elastic material, but it can be molded into an elastic structure. 

Image on the left: The hole punch contains two steel springs. They are elastic structures that compress when pressure is applied to the punch's lever. When the pressure is lifted, they return back to their original shape. Image on the right: Steel springs provide flexibility to the trampoline. 

Image on the left: Leaf springs are used in vehicles and machinery. Image on the right: A hunting trap is based on two u-shaped leaf springs.