50CrV4 Spring Steel Bar

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50CrV4 is a well-regarded spring steel known for its robust mechanical properties and excellent process performance. This steel, adhering to German standards and equivalent to Chinese GB 50CrVA, has seen attention in recent discussions regarding innovative manufacturing techniques and applications in high-load scenarios. It benefits from the addition of vanadium, which enhances grain refinement, reduces overheating sensitivity, and improves overall toughness and strength, achieving a high yield ratio. However, it’s important to note that it exhibits limited weldability and low cold deformation plasticity. This makes it ideal for high-performance applications such as valve springs, piston springs, and safety valve springs, working effectively in temperatures below 300 °C.

Chemical Composition:

C(')Si(')Mn(')P(')S(')Cr(')Ni(')Cu(%)V(%) 0.46-0.54 0.17-0.37 0.50-0.80 0.030 0.80-1.10 0.35 0.25 0.10-0.20

Mechanical Properties'

Tensile Strength σb (MPa):  Yield Strength σ0.2 (MPa): Elongation δ5 (%): Reduction of area ψ (%): Hardness: (130)  (115)  10  25 Max. 280HB

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Equivalent:

American grade: G

Japanese grade: SUP10

China GB grade: 50CrVA

British grades: 735A51

French grade: 50CrV4

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