Round bar peeled diameter 112 mm 1.8159 - 51CrV4 - 15 260

Basic designations

• Numeric designation (EN/DIN): 1.8159

• Steel grade: 51CrV4

• AISI/SAE equivalent: approx. 6150

Chemical composition (typical values)

• C (Carbon): 0.47 – 0.55 %

• Mn (Manganese): 0.70 – 1.10 %

• Si (Silicon): 0.15 – 0.40 %

• Cr (Chromium): 0.90 – 1.20 %

• V (Vanadium): 0.10 – 0.25 %

• P, S: max. 0.035 %

Properties

• High tensile strength and toughness after heat treatment.

• Good fatigue resistance, suitable for dynamically stressed parts.

• Can be quenched in oil or water.

• Hardness after quenching and tempering: approx. 50 – 58 HRC (depending on treatment).

• Excellent spring properties and dynamic load capacity.

Heat treatment

• Hardening: 830 – 870 °C, quench in oil or water.

• Tempering: 420 – 600 °C (depending on required hardness/elasticity).

• Annealing for springs: 680 – 720 °C.

Applications

• Coil springs, leaf springs, torsion bars.

• Stabilizers and suspension components in automotive industry.

• Highly stressed machine parts.