Sprung Steel

Sprung steel is a low alloy, medium carbon kind of steel. This alloy is used in springs because it does not easily lose its form. Technically, this means it has a higher elastic modulus compared to other steels.Silicon is the key component to most spring steel alloys. An example of a spring steel used for cars would be AISI 9255 (DIN and UNI: 55Si7, AFNOR 55S7), containing 1.50%-1.80% silicon, 0.70%-1.00% manganese and 0.52%-0.60% carbon.