EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C)
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) introduction
The free cutting case hardening steel 35S20 is used for bulk parts of mean strength, especially if ductility demands in transversal direction are as high as for usual C-steels (e.g. C35). Cutting speed is increased but higher cracking risk according to rising C-content has to be considered. Application in car industry, apparatus, equipment and machine engineering (e.g. screws, nuts, small-size parts). As a bright steel product it is used in the form of bars, bright, straight, in various conditions (see DIN EN 10277 : 1999-10).
Equivalent material: GB Y35, AFNOR 35MF6, BS 212M36, ISO 35S20, JIS SUM41, PN A35, SS 1957-03, VSM 35S20, UNE F.2131-35S20, SAE 1141, DIN 35S20, ASTM A108 Grade 1140, SAE 1140, UNS G11400, DIN 1.0726, AFNOR 35MF4, AFNOR 35S20, BS 35S20, UNI 1957, AISI 1140, JIS 35S20, EN 1.0726, GOST A35, GB/T U70302, GB/T Y30, GB/T U70352, GB/T Y35, ASTM 1140
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.8 - 7.85 g/cm³ |
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) 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 |
- |
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) 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 % |
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) 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 |
EN 10277-3 Grade 35S20 quenched and tempered and cold drawn (+QT+C) 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 9 - 14 % |
| 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 - 900 MPa |
| Yield strength Rp0.2 |
20.0 °C |
Yield strength Rp0.2 of 385 - 600 MPa |
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