DIN 1.8159 51CRV4 Spring Steel

Spring steel refers to steel specially used for the manufacture of springs and elastic components due to its elasticity in the quenched and tempered state. The elasticity of steel depends on its ability to elastic deformation, that is, within the specified range, the ability to elastic deformation makes it withstand a certain load, and there is no permanent deformation after the load is removed. Spring steel should have excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield ratio), elastomeric properties (that is, anti-elasticity, also known as anti-relaxation properties), fatigue properties, hardenability, physical and chemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.). In order to meet the above performance requirements, spring steel has excellent metallurgical quality (high purity and uniformity), good surface quality (strict control of surface defects and decarbonization), precise shape and size.

Mechanical property

Tensile strength σb (MPa):≥1274(130)

Yield strength σs (MPa):≥1127(115)

Elongation δ5 (%):≥10

Section shrinkage ratio ψ (%):≥40

Hardness: hot rolling,≤321HB; Cold drawing + heat treatment,≤321HB

Complete processing capability

Product Application

Product quality testing

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