EN 10132-4 Grade C125S Soft Annealed Steel – Ideal for Springs, Watches, and Precision Applications
The steel C125S is used as cold rolled strip for springs and special applications in thicknesses of up to 6 mm and as tempered cold strip in thicknesses from 0.30 to 3.00 mm. The springs made of steel C125S are suitable for highly stressed tension springs, especially in the watch industry, as well as for pen nibs.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.8 - 7.9 g/cm³ | Typical for Low Carbon Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 215 GPa | Typical for Low Carbon Steel |
Elongation A80 | 20.0 °C | 11 % | |
Hardness, Brinell | 20.0 °C | 97 [-] | |
Hardness, Vickers | 20.0 °C | 230 [-] | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Low Carbon Steel |
Shear modulus | 23.0 °C | 82 GPa | Typical for Low Carbon Steel |
Tensile strength | 20.0 °C | 740 MPa | |
Yield strength Rp0.2 | 20.0 °C | 600 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.32E-5 - 1.38E-5 1/K | Typical for Low Carbon Steel |
Max service temperature | 500 °C | Typical for Carbon Steel | |
Melting point | 1480 - 1526 °C | Typical for Low Carbon Steel | |
Specific heat capacity | 23.0 °C | 465 J/(kg·K) | Typical for Low Carbon Steel |
Thermal conductivity | 23.0 °C | 25 - 93 W/(m·K) | Typical for Low Carbon Steel |
Electrical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Electrical resistivity | 23.0 °C | 1.43E-7 - 1.74E-7 Ω·m | Typical for Carbon Steel |
Magnetic
| Property | Value | Comment |
|---|---|---|
Curie temperature | 770 °C | Typical for Low Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Carbon | 1.2 - 1.3 % |
Chromium | 0.4 % |
Manganese | 0.3 - 0.6 % |
Molybdenum | 0.1 % |
Nickel | 0.4 % |
Phosphorus | 0.03 % |
Silicon | 0.15 - 0.35 % |
Sulfur | 0.025 % |
Metal
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- EN 10132‑4 Grade C60S Soft‑Annealed Steel – Premium Spring & Cold‑Rolled Strip
- EN 10132-4: Grade C90S Soft Annealed Steel – Ideal for Springs & Cold‑Rolled Applications
- EN 10132-4 102Cr6 Soft Annealed Steel – Spring & Cold-Rolled Strip with Skin Pass Options (+A, +A+LC)
- EN 10132-4 Grade 80CrV2: Soft Annealed & Skin-Passed Steel for Springs & Cold-Rolled Applications
- EN 10132-4 Grade C100S: Soft Annealed Steel for Springs & Precision Applications
- EN 10132-4 Grade C67S – Soft Annealed & Skin-Passed Steel for Precision Spring Strips
- EN 10132-4 Grade C75S – Soft Annealed Steel for Springs & Cold‑Rolled Applications