What is the difference between FDSiCr and VDSiCr

In the standard of EN 10270-2, There are some difference between FDSiCr and VDSiCr

DIN EN 10270-2

Chemical Composition

The content ranges of carbon (C), silicon (Si), manganese (Mn), and chromium (Cr) of the two are similar, but there are differences in the control of impurity elements.

The maximum content of phosphorus (P) in FDSiCr is 0.030, the maximum content of sulfur (S) is 0.025, and the maximum content of copper (Cu) is 0.12.

The maximum phosphorus (P) content of VDSiCr is 0.025, the maximum sulfur (S) content is 0.020, and the maximum copper (Cu) content is 0.06.

VDSiCr has stricter control over these impurity elements and higher purity of steel

Mechanical Property

In the EN 10270-2 standard,FDSiCr belongs to the medium tensile strength level, while VDSiCr belongs to the high tensile strength level. Generally speaking,VDSiCr has higher strength, better toughness and fatigue resistance, and can withstand more severe dynamic loads

Tensile strength and fatigue

FDSiCr and VDSiCr Application

Production process

Due to the higher performance requirements of VDSiCr, the control over the steelmaking process, refining degree, heat treatment and other links during its production is stricter than that of FDSiCr. It needs more advanced production equipment and precise process control to ensure the stability of steel quality and consistency of performance.

Equivalents

If you need to purchase FDSiCr and VDSiCr spring steel wires, we sincerely invite you to contact us to obtain detailed price and wires technical data.

As a professional oil tempered spring steel wire manufacturer in China, we can provide high-quality FDSiCr and VDSiCr steels wires that comply with the EN 10270-2 standard. The chemical composition, mechanical properties, and application scenarios all strictly adhere to international norms.

For different specifications (such as round wire, straight bars, profiled wire, etc.) and large quantity requirements, we will offer:Customized Quotations: Competitive pricing based on purchase quantity, delivery time and special process requirements (such as surface treatment and heat treatment status);

Technical Support: Simultaneously providing material test reports (such as tensile strength and fatigue performance test data), and application selection recommendations;

Supply Chain Assurance: Relying on stable production bases and logistics networks to ensure delivery in time and after-sales tracking services.

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