Spring Wire

Spring steel wire is a material that comes in amazingly many different designs. Which different types exist according to the EN 10270, which alloy is used for each type, and for which the individual varieties are used, you will find clearly listed in this post.

Spring steel wire types according to EN 10270-1 and EN 10270-2

In the following table we have compared the individual types with designations, group and alloy, as well as the most important applications.

denominationvarietyDIN nameCarbon contentsiliconmanganesechromevanadiumcopperapplication areas
SLdrawn unalloyed spring steelVariety A0,35 – 1%0,10 – 0,30%0,50 – 1,20%Max. 0.20%Tension springs, compression springs, torsion springs - low static load
SMdrawn unalloyed spring steelVariety B0,35 – 1%0,10 – 0,30%0,50 – 1,20%Max. 0.20%Tension springs, compression springs, torsion springs mean static load
SHdrawn unalloyed spring steelVariety C0,35 – 1%0,10 – 0,30%0,50 – 1,20%Max. 0.20%Tension springs, compression springs, torsion springs medium dynamic load, even with strong bending
DMdrawn unalloyed spring steel0,45 – 1%0,10 – 0,30%0,50 – 1,20%Max. 0.12%Tension springs, compression springs, torsion springs, compression springs, torsion springs, high static load
DHdrawn unalloyed spring steelVariety D0,45 – 1%0,10 – 0,30%0,50 – 1,20%Max. 0.12%Tension springs, compression springs, torsion springs, high static or medium dynamic loads, shaped springs
FDCOil-tempered spring steelFD0,60 – 0,75%0,10 – 0,35%0,50 – 1,20%Max. 0.12%Unalloyed wires, static load
TDCOil-tempered spring steel0,60 – 0,75%0,10 – 0,35%0,50 – 1,20%Max. 0.10%Unalloyed wires, dynamic loading
VDCOil-tempered spring steelVD0,60 – 0,75%0,15 – 0,30%0,50 – 1,00%Max. 0.06%Unalloyed wires, difficult dynamic loading
FDSiCrOil-tempered spring steelFDSiCr0,50 – 0,60%1,20 – 1,60%0,50 – 0,90%0,50 – 0,80%Max. 0.12%Chromium-silizim alloy for temperature-resistant springs, static load
TDSiCrOil-tempered spring steel0,50 – 0,60%1,20 – 1,60%0,50 – 0,90%0,50 – 0,80%Max. 0.10%Chromium-silizim alloy for temperature-resistant springs, coupling
VDSiCrOil-tempered spring steelVDSiCr0,50 – 0,60%1,20 – 1,60%0,50 – 0,90%0,50 – 0,80%0,15 – 0,25%Max. 0.06%Chromium-silizim alloy for temperature-resistant springs, valve springs

Tips & Tricks

In addition, spring steel wires are often sorted in other divisions under different terms - such as in pianoforte wires. This often causes confusion. With its variety code, DIN is therefore the most reliable sorting system, which does not cause any confusion.

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