EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT)
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) introduction
The steel 71 Si 7 is used for highest loaded tension springs in the clock engineering and similar applications up to 3.0 mm sheet thicknesses.
Equivalent material: GOST 70S2ChA, DIN 1.5029, EN 71Si7, EN 1.5029
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) general
| Property | Temperature | Value |
|---|---|---|
| Density | 20.0 °C | Density of 7.78 g/cm³ |
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) thermal
| Property | Temperature | Value |
|---|---|---|
| Coefficient of thermal expansion | -100.0 °C | Coefficient of thermal expansion of 1.05E-5 1/K |
| - | 20.0 °C | Coefficient of thermal expansion of 1.15E-5 1/K |
| - | 100.0 °C | Coefficient of thermal expansion of 1.21E-5 1/K |
| - | 200.0 °C | Coefficient of thermal expansion of 1.27E-5 1/K |
| - | 300.0 °C | Coefficient of thermal expansion of 1.32E-5 1/K |
| - | 400.0 °C | Coefficient of thermal expansion of 1.36E-5 1/K |
| - | 500.0 °C | Coefficient of thermal expansion of 1.4E-5 1/K |
| - | 600.0 °C | Coefficient of thermal expansion of 1.44E-5 1/K |
| Specific heat capacity | 20.0 °C | Specific heat capacity of 461 J/(kg·K) |
| - | 100.0 °C | Specific heat capacity of 479 J/(kg·K) |
| - | 200.0 °C | Specific heat capacity of 499 J/(kg·K) |
| - | 300.0 °C | Specific heat capacity of 517 J/(kg·K) |
| - | 400.0 °C | Specific heat capacity of 536 J/(kg·K) |
| - | 500.0 °C | Specific heat capacity of 558 J/(kg·K) |
| - | 600.0 °C | Specific heat capacity of 587 J/(kg·K) |
| Thermal conductivity | 20.0 °C | Thermal conductivity of 34.1 W/(m·K) |
| - | 100.0 °C | Thermal conductivity of 35.2 W/(m·K) |
| - | 200.0 °C | Thermal conductivity of 36.5 W/(m·K) |
| - | 300.0 °C | Thermal conductivity of 36.7 W/(m·K) |
| - | 400.0 °C | Thermal conductivity of 35.8 W/(m·K) |
| - | 500.0 °C | Thermal conductivity of 34.5 W/(m·K) |
| - | 600.0 °C | Thermal conductivity of 32.9 W/(m·K) |
| Thermal diffusivity | 20.0 °C | Thermal diffusivity of 9.5 mm²/s |
| - | 100.0 °C | Thermal diffusivity of 9.2 mm²/s |
| - | 200.0 °C | Thermal diffusivity of 8.9 mm²/s |
| - | 300.0 °C | Thermal diffusivity of 8.3 mm²/s |
| - | 400.0 °C | Thermal diffusivity of 7.7 mm²/s |
| - | 500.0 °C | Thermal diffusivity of 6.7 mm²/s |
| - | 600.0 °C | Thermal diffusivity of 5.6 mm²/s |
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) magnetic
| Property | Value |
|---|---|
| Carbon | Carbon of 0.68 - 0.75 % |
| Manganese | Manganese of 0.6 - 0.8 % |
| Phosphorus | Phosphorus of 0.04 % |
| Silicon | Silicon of 1.5 - 1.8 % |
| Sulfur | Sulfur of 0.035 % |
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) electrical
| Property | Temperature | Value |
|---|---|---|
| Electrical resistivity | 20.0 °C | Electrical resistivity of 3.05E-7 Ω·m |
| - | 100.0 °C | Electrical resistivity of 3.64E-7 Ω·m |
| - | 200.0 °C | Electrical resistivity of 4.32E-7 Ω·m |
| - | 300.0 °C | Electrical resistivity of 5.12E-7 Ω·m |
| - | 400.0 °C | Electrical resistivity of 6.07E-7 Ω·m |
| - | 500.0 °C | Electrical resistivity of 7.16E-7 Ω·m |
| - | 600.0 °C | Electrical resistivity of 8.42E-7 Ω·m |
EN 10132-4 Grade 71Si7 cold rolled, quenched and tempered (+C+QT) mechanical
| Property | Temperature | Value |
|---|---|---|
| Elastic modulus | -100.0 °C | Elastic modulus of 217 GPa |
| - | 20.0 °C | Elastic modulus of 206 - 212 GPa |
| - | 100.0 °C | Elastic modulus of 207 GPa |
| - | 200.0 °C | Elastic modulus of 199 GPa |
| - | 300.0 °C | Elastic modulus of 192 GPa |
| - | 400.0 °C | Elastic modulus of 184 GPa |
| - | 500.0 °C | Elastic modulus of 175 GPa |
| - | 600.0 °C | Elastic modulus of 164 GPa |
| Hardness, Vickers | 20.0 °C | Hardness, Vickers of 445 - 650 [-] |
| Shear modulus | 20.0 °C | Shear modulus of 78 GPa |
| Tensile strength | 20.0 °C | Tensile strength of 1500 - 2200 MPa |