ISO 683-4 Grade 35S20 quenched and tempered (+QT)
ISO 683-4 Grade 35S20 quenched and tempered (+QT) introduction
The free-cutting steel 35S20, suitable for quenching and tempering, is used for bulk parts of mean strength, especially for lower requirements to ductility in transversal direction opposite to comparable C-steels (e.g. C35). Increased cutting speed represents an advantage, the increased cracking risk at rising C-content has to be considered. Application in automotive engineering, as well as in apparatus equipment and machine engineering (e.g. screws, nuts, small-size parts).
Equivalent material: GB Y35, GB U70352, EN 1.0726, ISO 35S20, GOST A35, SAE 1140, UNS G11400, DIN 1.0726, DIN 35S20, AFNOR 35MF4, AFNOR 35S20, AFNOR 35MF6, BS 212M36, BS 35S20, UNI 1957, AISI 1140, JIS 35S20, GB/T U70302, GB/T Y30, GB/T U70352, GB/T Y35, ASTM 1140
ISO 683-4 Grade 35S20 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.8 - 7.85 g/cm³ |
ISO 683-4 Grade 35S20 quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 1.08E-5 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.19E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.1E-5 - 1.25E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.18E-5 - 1.3E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.36E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.32E-5 - 1.41E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.45E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.49E-5 1/K |
- |
| Max service temperature |
- |
Max service temperature of 500 °C |
Typical for Carbon Steel |
| Melting point |
- |
Melting point of 1380 - 1514 °C |
Typical for Medium Carbon Steel |
| Specific heat capacity |
-100.0 °C |
Specific heat capacity of 423 J/(kg·K) |
- |
| - |
20.0 °C |
Specific heat capacity of 420 - 461 J/(kg·K) |
- |
| - |
100.0 °C |
Specific heat capacity of 479 - 490 J/(kg·K) |
- |
| - |
200.0 °C |
Specific heat capacity of 499 - 530 J/(kg·K) |
- |
| - |
300.0 °C |
Specific heat capacity of 517 J/(kg·K) |
- |
| - |
400.0 °C |
Specific heat capacity of 536 - 610 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 44.9 - 49 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 46.2 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 45.5 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 43.1 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 40.4 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 37.7 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 34.9 W/(m·K) |
- |
| Thermal diffusivity |
20.0 °C |
Thermal diffusivity of 12.5 mm²/s |
- |
| - |
100.0 °C |
Thermal diffusivity of 12 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 11 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 9.8 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.6 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 7.3 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 5.9 mm²/s |
- |
ISO 683-4 Grade 35S20 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.32 - 0.39 % |
| Manganese |
Manganese of 0.7 - 1.1 % |
| Phosphorus |
Phosphorus of 0.06 % |
| Silicon |
Silicon of 0.4 % |
| Sulfur |
Sulfur of 0.15 - 0.25 % |
ISO 683-4 Grade 35S20 quenched and tempered (+QT) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 1.2E-7 - 2.32E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 2.77E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.47E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.35E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.38E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.56E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 7.95E-7 Ω·m |
ISO 683-4 Grade 35S20 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
| Elastic modulus |
-100.0 °C |
Elastic modulus of 217 GPa |
| - |
20.0 °C |
Elastic modulus of 210 - 212 GPa |
| - |
100.0 °C |
Elastic modulus of 207 GPa |
| - |
200.0 °C |
Elastic modulus of 193 - 199 GPa |
| - |
300.0 °C |
Elastic modulus of 185 - 192 GPa |
| - |
400.0 °C |
Elastic modulus of 175 - 184 GPa |
| - |
500.0 °C |
Elastic modulus of 175 GPa |
| - |
600.0 °C |
Elastic modulus of 164 GPa |
| Elongation |
20.0 °C |
Elongation of 15 - 17 % |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.28 [-] |
| Shear modulus |
20.0 °C |
Shear modulus of 81 GPa |
| Tensile strength |
20.0 °C |
Tensile strength of 550 - 780 MPa |
| Yield strength |
20.0 °C |
Yield strength of 320 - 430 MPa |
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