GB/T 1222-2007/50CrVA/GB/T 5218-1999/YB/T 5058-2005/GJB 1951-1994

Chemical Composition

Carbon (C): 0.46% to 0.54%Silicon

(Si): 0.17% to 0.37%

Manganese (Mn): 0.50% to 0.80%

Chromium (Cr): 0.80% to 1.10%

Vanadium(V): 0.10% to 0.20%

Sulfur (S) and phosphorus (P): both ≤ 0.030% (≤ 0.025% in some advanced quality standards

nickel (Ni) ≤ 0.35% and copper (Cu) ≤ 0.25%.

Physical Property

Tensile strength:

≥ 1274 MPa (approximately 130 kgf/mm ²)

Yield strength:

≥ 1127 MPa (approximately 115 kgf/mm ²)

Hardness:

The hardness in the hot-rolled state is ≤ 321 HB, and it can be adjusted according to demand after heat treatment.

Resilience:

Cross-sectional shrinkage rate ≥ 40%, elongation rate ≥ 10%.

Main Purpose

50CrVA steel is widely used in:

Spring manufacturing:

Such as high stress springs and elastic components in automobiles, locomotives, and machinery.

Heavy load equipment:

A key component of high-speed heavy-duty locomotives that can withstand alternating loads under complex operating conditions.

Precision components:

Precision mechanical components that require high durability and stability, such as spring components in electrical appliances.In the aviation field, it meets the standards for high-quality structural steel used in aviation and is used to manufacture high-performance structural components.The synergistic effect of carbon, chromium, and vanadium elements significantly improves the corrosion resistance, grain refinement, and overheating sensitivity control of steel, making it suitable for industrial scenarios with strict requirements for mechanical properties and reliability.