51crv4 Spring Steel

51CrV4 is a high-strength low-alloy steel, containing Cr, V and C alloying elements, with high strength, fatigue resistance, high elasticity and wear resistance. Suitable for spring manufacturing, tool manufacturing, automotive industry and other fields. This material is usually selected for processing because of its excellent performance and applicability, and the corresponding standards and regulations need to be followed.

Physical property

Chemical composition

C：0,47 - 0,55

Si：max. 0,40

Mn：0,70 - 1,10

P：max. 0,035

S：max. 0,035

Cr：0,90 - 1,20

V：0,10 - 0,25

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

Heat treatment specification and metallographic structure

Heat treatment specification: quench 850℃±20℃, oil cold; Tempering 500℃±50℃(for special needs,±30℃).

use

51CrV4 is a higher level spring, used as a large section of high load important spring and operating temperature < 300 ℃ valve spring, piston spring, safety valve spring.

Product quality testing

Packing & Delivery

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