50CrVA？ Standard:

GB/T 1222-2007

Characteristics and scope of application of 50CrVA:

Good mechanical properties and technological properties, high hardenability, adding vanadium can refine the grain of steel, reduce overheating sensitivity, improve strength and toughness, and have high fatigue strength and yield ratio, but poor weldability and low cold deformation plasticity. It is an advanced spring, which is used as an important spring with large cross-section and high load, and its working temperature is less than 300? When the valve spring, piston spring and safety valve spring are at 50℃.

50CrVA？ Chemical composition:

Carbon? c？ :0.46~0.54

Silicon? Si:0. 17~0.37

Manganese? Manganese: 0.50-0.80

Sulfur? s？ :≤0.030

Phosphorus? p？ :≤0.030

Chromium? Cr:0.80~ 1. 10

Nickel? Nickel: ≤0.35

Copper? Copper: ≤0.25

Vanadium v :0. 10~0.20

50CrVA？ Mechanical properties:

Tensile strength? σb (MPa):≥ 1274( 130)

Yield strength? σs(MPa):≥ 1 127( 1 15)

Elongation? δ5 (%):≥ 10

Area shrinkage? ψ? (%):≥40

Hardness? : hot rolling, ≤ 321HB; Cold drawing+heat treatment, ≤32 1HB

50CrVA？ Heat treatment specification:

Quenching at 850℃ 20℃ and oil cooling; Tempering at 500℃ 50℃ (30℃ if necessary).

50CrVA？ Delivery status:

Hot rolled steel is delivered with or without heat treatment, and cold drawn steel is delivered with heat treatment.

50CrVA？ Main specifications:

50CrVA round bars, 50CrVA rolled bars, 50CrVA cold-drawn bars, 50CrVA forged bars, 50CrVA plates, 50CrVA flat steel, 50CrVA forgings, 50CrVA forged rings, 50CrVA workpieces, 50CrVA pipes and 50CrVA forged cakes.