51CrV4 6150 Spring Steel
51CrV4 6150 Spring Steel
51CrV4 6150 Spring Steel
51CrV4 6150 Spring Steel
51CrV4 6150 Spring Steel

51CrV4 6150 Spring Steel

Chemical composition Carbon C: 0.47 ~ 0.55 Silicon Si: ≤0.40 Manganese Mn: 0.70 ~ 1.10 Sulfur S: ≤0.030 P: ≤0.030 Chromium Cr: 0.90 ~ 1.20 Nickel Ni: ≤0.35 Copper Cu: ≤0.25 Vanadium: 0.10 ~ 0.25

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Product Introduction

Product Name:

● International name:

51CrV4, 1.8159, G61500, 6150, SUP10, 50CrVA, A23503

● Implementation standard:

EN10089, ISO 683/14, ASTM A29/A29M, JIS G4801, GB/T 1222, etc.

● Main ingredients (%) :

Carbon (C)0.47 ~ 0.55

Silicon (Si)≤0.40

Manganese (Mn)0.70 ~ 1.10

Phosphorus (P)≤0.025

Sulfur (S)≤0.025

Chromium (Cr)0.90 ~ 1.20

Vanadium (V)0.10 ~ 0.25

● Heat treatment process specification and performance:

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

Tensile strength ≥1275Mpa

Yield strength ≥1130MPa

Elongation after fracture ≥10%

Section shrinkage ≥40%

Mechanical properties: hot rolling hardness ≤321HBW, cold drawing + heat treatment hardness ≤321HBW.

● Features and applications:

51CrV4 belongs to German standard spring steel, which has good mechanical properties and process properties, and high hardenability. The addition of vanadium in the steel makes the grain fine, reduces the overheating sensitivity, improves the strength and toughness, has high fatigue strength, high yield ratio, but poor weldability, low cold deformation plasticity.

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