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Spring steel – tough and maximally elastic

Spring steels for industrial springs.

Spring steels made by thyssenkrupp are within the carbon range of 0.55 to 1%. The especially high-carbon spring steels can be hardened, but also be tempered and subjected to other treatments like isothermal transformation.

Spring steels feature a tensile strength and fatigue strength favorable for the application, a high elongation at fracture and area reduction at fracture and are particularly elastic. They can be bent up to the elastic limit and return to their original position after the load is removed without being permanently deformed. The high elastic limit is achieved by a special alloy containing silicon, manganese, chrome, vanadium, molybdenum and nickel. The tensile strength is obtained by the final heat treatment.

We supply spring steels C55S, C60S, C67S, C75S and C100S as well as 51CrV4 and 80CrV2 according to DIN EN 10132-4.

Typical applications of spring steel

Typical applications of spring steel are technical springs like cup springs, return springs or suspension springs.

thyssenkrupp supplies the following steel grades as per the product information or the reference steel grades in accordance with the respective standards.

Spring steel according to DIN EN 10132-4

Steel grade designation Reference grade THICKNESS1
from _ to in mm
WIDTH1
from _ to in mm
C55S C55S 2,00 – 13,00 50 – 1,630
C60S C60S 2,00 – 13,00 50 – 1,630
C67S C67S 2,00 – 13,00 60 – 1,630
C75S C75S 2,00 – 13,00 60 – 1,630
C100S C100S 2,00 – 13,00 80 – 1,630
51CrV4 51CrV4 2,00 – 13,00 100 – 1,630
80CrV2 80CrV2 2,00 – 13,00 100 – 1,630
1. Not all thickness and width combinations possible.

Chemical composition of spring steel

Steel grade C [%]
Si [%] Mn [%]
P [%] ­max. S [%] ­max. Cr [%] ­max. / – Mo [%] Ni [%] ­max. V [%]
C55S 0.52 – 0.60 0.15 – 0.35 0.60 – 0.90 0.025 0.010 0.40 0.10 0.40
C60S 0.57 – 0.65 0.15 – 0.35 0.60 – 0.90 0.025 0.010 0.40 0.10 0.40
C67S 0.65 – 0.73 0.15 – 0.35 0.60 – 0.90 0.025 0.010 0.40 0.10 0.40
C75S 0.70 – 0.80 0.15 – 0.35 0.60 – 0.90 0.025 0.010 0.40 0.10 0.40
C100S 0.95 – 1.05 0.15 – 0.35 0.30 – 0.60 0.025 0.010 0.40 0.10 0.40
51CrV4 0.47 – 0.55 0.40 0.70 – 1.10 0.025 0.010 0.90 – 1.20 0.10 0.40 0.10 – 0.25
80CrV2 0.75 – 0.85 0.15 – 0.35 0.30 – 0.50 0.025 0.010 0.40 – 0.60 0.10 0.40 0.15 – 0.25
Mass fractions in ladle analysis.
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