The spring material mechanical spring is to make full use of the physical properties of the material, to achieve its stored energy and release energy through a certain transformation. The properties of the material determine the physical and mechanical properties of the spring, which affects the design and development of the spring and the improvement of special performance requirements. The most commonly used materials are metal and non-metallic materials. The rapid development of modern new material varieties, especially the new high strength metal alloy, has made the mechanical spring more efficient. Raw materials at the same time the follow-up processing method of optimization, such as the structure shape, heat treatment and surface quality, etc., to make the application and development of spring more can meet the functional requirements, further enhance the safety, economy and environment of spring products use protective properties. In recent years, with the rapid development of chemical rubber industry, polyurethane materials have been widely used in spring products, which are widely used in the field of vibration reduction and noise reduction. Liquid nitrogen or air as the medium of air spring is also widely applied in stamping die, host, vibration reduction, constant force apparatus, ultra high temperature elastic structure in areas such as: the most commonly used materials have two broad categories: metal materials and nonmetal materials commonly used metal materials are: spring steel, spring with stainless steel, spring with copper alloy, nickel and nickel alloys, spring with elastic alloy, spring with other special alloys and recently developed ultra pure spring steel commonly used non-metallic materials are: polyurethane, rubber, plastic, carbon fiber and special material, such as gas.