Whether spring steel, bronze or brass wire – everyone Spring material has a specific strength. This determines the degree of mechanical resistance, for example if it comes to plastic deformation or separation. The characteristic values for the strength can with a Stress-strain diagram be determined.

The following factors can affect the Strength of materials influence:
• The type and condition of a spring material
• The temperature during processing
• The rate of exercise
• The stress level

Above all, the loads to which a spring is exposed have a direct influence on its strength. A distinction can therefore be made between the types of strengths in the direct dependence of the Stress .

Temporal differentiation:
• In the static strength the load is dormant.
• In the dynamic strength , also Fatigue strength called, the load changes. This strength describes the deformation and failure behavior of an oscillating (dynamically) loaded material for a certain number of cycles. It is made using the Wöhler experiment calculated.

Differentiation according to the type or direction of exposure:
• Tensile strength: It stands for the highest mechanical stress in the material during a tensile test.
• Compressive strength: It describes the resilience of the spring material under the action of compressive forces.
• Flexural strength: It describes the resistance of a material when it is bent.

For the selection of a spring material, the tensile strenght a significant role. Important for the mechanical Design of the spring is the minimum value, i.e. the guaranteed strength value. If you have any questions about spring materials, please send an email to service@federnshop.com or contact our directly technology at (0049) 0035 877 227-11 .

Here you will find a selection of spring materials with high Fatigue strength :

Spring materialApplicationRm min (N/mm²)
at wire size 1 mm
EN 10270-1 Typ DH
Spring steel wire
All common springs, high static and medium dynamic stress2220
EN 10270-1 Typ SH
Spring steel wire
All common springs, high static and medium dynamic stress2220
EN 10270-2 / VDC (unalloyed)
Valve spring wire
With high continuous vibration stress1800
EN 10270-2 / VDSiCr (alloyed)
valve spring wire
High dynamic stress above 100° C, good relaxation properties2080
EN 10270-2 / VDCrV (alloyed)
valve spring wire
High dynamic stress over 100C, good relaxation properties1910
1.4568 / X7CrNiAI17-7 Spring steel V4ALow relaxation, high fatigue strength1800
Spring materials with high fatigue strength