The concept of spring steel: 

 The spring steel is due to the flexibility in the quenched and tempered condition, which are specialized for the manufacture of steel springs and elastic components. 

 The elasticity of the steel depends on the ability of its elastic deformation, that is, within the limits prescribed by the elastic deformation of the ability to accept 

 By the load, the permanent deformation after load removal 

 Spring steel characteristics: 

 Spring steel has excellent overall performance, such as mechanical properties (particularly elastic limit, ultimate strength, yield ratio) 

 Reduction performance of ballistic resistance (ie resistance decreased elasticity of the performance, also known as anti-stress relaxation properties), fatigue properties, hardenability, physical and chemical 

 Energy (heat, low temperature resistance, oxidation resistance, corrosion resistance, etc.). 

 In order to meet these performance requirements, spring steel with excellent metallurgical quality (high purity and uniformity), good 

 Good surface quality (strict control of surface defects and decarburization), the exact shape and size. 

 Spring steel use: 

 The spring steel is mainly used in locomotives, vehicles, automobiles, tractors, airplanes, all kinds of spiral springs and leaf springs, etc..