Spring Steel Wire EN 10270-2: Alloyed Steel for Mechanical Springs
General Specifications
Spring wire manufactured in compliance with the European standard EN 10270-2 is a high-quality alloyed steel product designed for various types of mechanical springs. Produced via cold drawing followed by heat treatment, the wire provides an optimal combination of strength, elasticity, and fatigue resistance.
Wire diameters range from 0.28 to 18.0 mm, enabling its use in springs of different sizes and purposes. The surface of the wire has a light gray color typical of heat-treated steel, free from scale and mechanical defects.
Chemical Composition (%)
CHEMICAL COMPOSITION — OIL-QUENCHED AND TEMPERED STEEL FOR MECHANICAL SPRINGS EN 10270-2
| Chemical Composition Mass % | C | Si | Mn | P (max %) | S (max %) | Cu (max %) | Cr | V |
|---|---|---|---|---|---|---|---|---|
| FDC | 0.60-0.75 | 0.10-0.35 | 0.50-1.20 | 0.03 | 0.025 | 0.12 | — | — |
| FDSiCr | 0.50-0.60 | 1.20-1.60 | 0.50-0.90 | 0.03 | 0.025 | 0.12 | 0.50-0.80 | — |
| FDSiCrV | 0.50-0.70 | 1.20-1.65 | 0.40-0.90 | 0.03 | 0.025 | 0.12 | 0.50-1.00 | 0.10-0.25 |
| TDSiCr | 0.50-0.60 | 1.20-1.60 | 0.50-0.90 | 0.025 | 0.02 | 0.1 | 0.50-0.80 | — |
| TDSiCrV | 0.50-0.70 | 1.20-1.65 | 0.40-0.90 | 0.02 | 0.02 | 0.1 | 0.50-1.00 | 0.10-0.25 |
| VDSiCr | 0.50-0.60 | 1.20-1.60 | 0.50-0.90 | 0.025 | 0.02 | 0.06 | 0.50-0.80 | — |
| VDSiCrV | 0.50-0.70 | 1.20-1.65 | 0.40-0.90 | 0.02 | 0.02 | 0.06 | 0.50-1.00 | 0.10-0.25 |
Mechanical Properties
| Diameter (mm) | Tensile Strength (N/mm²) | Elastic Modulus (GPa) |
|---|---|---|
| 0.28-1.60 | 1900-2380 | 206 |
| 1.61-3.20 | 1800-2380 | 206 |
| 3.21-10.0 | 1700-2100 | 206 |
| 10.1-18.0 | 1600-1900 | 206 |
Applications
EN 10270-2 wire is widely used in the following sectors:
- Automotive industry (valve springs, suspension springs)
- Mechanical engineering (springs for machinery and equipment)
- Household appliances
- Rail transport
- Agricultural machinery
- Industrial equipment
Features
- High fatigue strength due to specially formulated chemical composition and heat treatment
- Consistent mechanical properties along the entire length of the wire
- Excellent weldability and cold-forming ability
- Enhanced corrosion resistance compared to non-alloyed steel grades
- Long service life in cyclic load conditions
- Minimal diameter deviations for precision in spring manufacturing
Quality Control and Certification
Each batch undergoes strict quality control and is accompanied by an EN 10204 3.1 certificate, confirming compliance with EN 10270-2 standards. Tests include:
- Chemical composition
- Mechanical properties
- Surface quality
- Geometric parameters
Storage and Transportation
The wire is supplied in coils or spools, wrapped in protective paper or plastic film to prevent corrosion. It should be stored in dry, closed areas with relative humidity not exceeding 70%.
This spring wire combines high mechanical properties, stable quality, and versatility, making it an optimal choice for producing durable springs for various applications.
Forms made of spring steel wire EN 10270-2
Steel wire | |
| Steel grade | Diameters (mm) |
| FDC, FDSiCr, FDSiCrV, TDSiCr, TDSiCrV, VDSiCr, VDSiCrV | 0.28 – 18 |
