What is the importance of steel in helical spring (i want clearly)?
*A Coil spring, also known as a helical spring, is a mechanical device, which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded. Coil springs are a special type of torsion spring, the material of the spring acts in torsion when the spring is compressed or extended. The two usual types of coil spring are: 1.Tension coil springs which are designed to resist stretching. They usually have a hook or eye form at each end for attachment. 2.Compression coil springs are designed to resist being compressed. A typical use for compression coil springs is in car suspension systems. http://en.wikipedia.org/wiki/Coil_spring *An ideal spring material has high strength properties, a high elastic limit and a low modulus. Because springs
