DIN 17200 Grade C40: Normalized or Normalized Formed Steel for Heavy-Duty Applications
Steel C 40 is suitable for larger forged parts in vehicle manufacturing and machine engineering (e.g. road wheels, axles). Lowest application temp. -25 °C.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.8 - 7.85 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | -100.0 °C | 217 GPa |
20.0 °C | 210 - 212 GPa | |
100.0 °C | 205 - 207 GPa | |
200.0 °C | 195 - 199 GPa | |
300.0 °C | 185 - 192 GPa | |
400.0 °C | 175 - 184 GPa | |
500.0 °C | 175 GPa | |
600.0 °C | 164 GPa | |
Elongation | 20.0 °C | 17 - 19 % |
Elongation, transverse | 20.0 °C | 15 - 17 % |
Poisson's ratio | 20.0 °C | 0.28 [-] |
Shear modulus | 20.0 °C | 81 GPa |
Tensile strength | 20.0 °C | 510 - 720 MPa |
Tensile strength, transverse | 20.0 °C | 510 - 720 MPa |
Yield strength | 20.0 °C | 260 - 320 MPa |
Yield strength, transverse | 20.0 °C | 260 - 320 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | -100.0 °C | 1.08E-5 1/K | |
20.0 °C | 1.19E-5 1/K | ||
100.0 °C | 1.11E-5 - 1.25E-5 1/K | ||
200.0 °C | 1.21E-5 - 1.3E-5 1/K | ||
300.0 °C | 1.29E-5 - 1.36E-5 1/K | ||
400.0 °C | 1.35E-5 - 1.41E-5 1/K | ||
500.0 °C | 1.45E-5 1/K | ||
600.0 °C | 1.49E-5 1/K | ||
Max service temperature | 500 °C | Typical for Carbon Steel | |
Max service temperature, long | -25 - 0 °C | ||
Melting point | 1380 - 1514 °C | Typical for Medium Carbon Steel | |
Specific heat capacity | -100.0 °C | 423 J/(kg·K) | |
20.0 °C | 461 - 480 J/(kg·K) | ||
100.0 °C | 479 J/(kg·K) | ||
200.0 °C | 499 J/(kg·K) | ||
300.0 °C | 517 J/(kg·K) | ||
400.0 °C | 536 J/(kg·K) | ||
500.0 °C | 558 J/(kg·K) | ||
600.0 °C | 587 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 44.9 - 52 W/(m·K) | |
100.0 °C | 46.2 - 50.6 W/(m·K) | ||
200.0 °C | 45.5 - 48.1 W/(m·K) | ||
300.0 °C | 43.1 - 45.7 W/(m·K) | ||
400.0 °C | 40.4 W/(m·K) | ||
500.0 °C | 37.7 W/(m·K) | ||
600.0 °C | 34.9 W/(m·K) | ||
Thermal diffusivity | 20.0 °C | 12.5 mm²/s | |
100.0 °C | 12 mm²/s | ||
200.0 °C | 11 mm²/s | ||
300.0 °C | 9.8 mm²/s | ||
400.0 °C | 8.6 mm²/s | ||
500.0 °C | 7.3 mm²/s | ||
600.0 °C | 5.9 mm²/s | ||
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 1.2E-7 - 2.32E-7 Ω·m |
100.0 °C | 2.77E-7 Ω·m | |
200.0 °C | 3.47E-7 Ω·m | |
300.0 °C | 4.35E-7 Ω·m | |
400.0 °C | 5.38E-7 Ω·m | |
500.0 °C | 6.56E-7 Ω·m | |
600.0 °C | 7.95E-7 Ω·m | |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.37 - 0.44 % |
Manganese | 0.5 - 0.8 % |
Phosphorus | 0.05 % |
Silicon | 0.4 % |
Sulfur | 0.045 % |
Metal
- DIN 2394-2: Grade St 28 Steel – Normalized & Normalized Formed (+N) Properties
- DIN 17240 Grade C35 Steel – Normalized or Normalized‑Formed (+N) for Creep Resistance up to 400 °C
- DIN 2395‑3 Grade M22 Tubes – Normalized & Normalized‑Formed (N)
- DIN 2391-2: Grade St 30 Al Seamless Steel Tubes – Normalized or Formed (+N)
- DIN 17200 Grade C60 Steel – Normalized/Normalized Formed (N) for High Ductility & Wear Resistance
- DIN 17200 Grade C35 Steel – Normalized or Normalized Formed (N) for Automotive & Machinery Applications
- DIN 17200 Grade C45 – Normalized or Normalized‑Formed Steel for Automotive & Machinery Applications
- DIN 17200 Grade C50 Steel – Normalized/Normalized Formed (+N) for High‑Strength Vehicle and Machine Parts
- DIN 17200 Grade C55: Normalized or Normalized Formed Steel for High-Stress Applications
- DIN 17200: Grade C22 Normalized or Normalized Formed Steel – Properties & Applications