EN 10132-4 Grade C125S Quenched & Tempered Steel – Precision Spring & Watch Industry Grade
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 |
Hardness, Rockwell C | 20.0 °C | 38.5 - 57 [-] | |
Hardness, Vickers | 20.0 °C | 370 - 630 [-] | |
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 | 1200 - 2100 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
- EN 10132-4 Grade 51CrV4 Quenched & Tempered Steel (QT) – High-Performance Cold-Rolled Strip
- EN 10132-4 Grade 102Cr6 Quenched & Tempered Steel – High Strength, Low Temperature Performance
- EN 10132-4 Grade 80CrV2 Steel: Quenched & Tempered (QT) – High-Performance Spring Strip
- EN 10132-4 Grade C55S Quenched & Tempered Steel – Ideal for Springs & Cold-Rolled Strips
- EN 10132-4 Grade C60S – Premium Quenched & Tempered High‑Carbon Steel
- EN 10132-4 Grade C90S Quenched & Tempered Steel – High-Performance Spring Material
- EN 10132-4 Grade C100S: Quenched & Tempered Steel for Precision Springs and Cold‑Rolled Applications
- EN 10132‑4 Grade C85S Quenched & Tempered Steel – Premium Cold‑Rolled Strip for Springs & Thin Components
- EN 10132-4 Grade C125S Quenched Steel – Precision Spring & Strip Material
- EN 10132-4 Grade C75S Quenched & Tempered Steel – High-Strength, High-Hardness Performance