51crv4 Spring Steel Wire

Features and scope of application:

51CrV4 (1.8159) spring steel has good mechanical properties and process performance, high hardenability, adding vanadium to refine the grain of steel, reducing superheat sensitivity, improving strength and toughness, high fatigue strength, yield ratio Higher, but poor weldability, cold due to low deformation plasticity. The 51CrV4 is a higher-grade spring used as a high-load important spring with a large cross section and a valve spring, piston spring, and safety valve spring with an operating temperature <300 °C.

51CrV4 spring steel chemical composition:

Carbon C: 0.47~0.55

Silicon Si: ≤ 0.40

Manganese Mn: 0.70 to 1.10

Sulfur S :≤0.030

Phosphorus P :≤0.030

Chromium Cr: 0.90 to 1.20

Nickel Ni: ≤0.35

Copper Cu: ≤ 0.25

Vanadium V: 0.10~0.25

Heat treatment specifications and metallographic organization:

Heat treatment specification: quenching 850 ° C ± 20 ° C, oil cooling; tempering 500 ° C ± 50 ° C (specially required, ± 30 ° C).

Delivery status: Hot rolled steel is delivered in heat or non-heat treated condition, and cold drawn steel is delivered in heat treated condition.

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