DIN 2395-3 Grade QStE 340 N Welded Precision Tubes – Normalized or Normalized‑Formed (+N)
Rectangular and square welded precision tubes made from QStE 340 N are manufactured by cold forming and electrical resistance welding. Application: automotive engineering
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.84 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | -100.0 °C | 217 GPa | |
20.0 °C | 212 GPa | ||
100.0 °C | 207 GPa | ||
200.0 °C | 199 GPa | ||
300.0 °C | 192 GPa | ||
400.0 °C | 184 GPa | ||
500.0 °C | 175 GPa | ||
600.0 °C | 164 GPa | ||
Elongation | 20.0 °C | 27 % | |
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 | 460 - 580 MPa | |
Yield strength | 20.0 °C | 340 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 | 1.25E-5 1/K | ||
200.0 °C | 1.3E-5 1/K | ||
300.0 °C | 1.36E-5 1/K | ||
400.0 °C | 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 | |
Melting point | 1480 - 1526 °C | Typical for Low Carbon Steel | |
Specific heat capacity | -100.0 °C | 423 J/(kg·K) | |
20.0 °C | 461 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 | -100.0 °C | 46.5 W/(m·K) | |
20.0 °C | 49.4 W/(m·K) | ||
100.0 °C | 49.4 W/(m·K) | ||
200.0 °C | 47.8 W/(m·K) | ||
300.0 °C | 45.1 W/(m·K) | ||
400.0 °C | 41.8 W/(m·K) | ||
500.0 °C | 38.6 W/(m·K) | ||
600.0 °C | 35.3 W/(m·K) | ||
Thermal diffusivity | -100.0 °C | 15.9 mm²/s | |
20.0 °C | 13.7 mm²/s | ||
100.0 °C | 12.7 mm²/s | ||
200.0 °C | 11.5 mm²/s | ||
300.0 °C | 10.2 mm²/s | ||
400.0 °C | 8.9 mm²/s | ||
500.0 °C | 7.4 mm²/s | ||
600.0 °C | 5.8 mm²/s | ||
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | -100.0 °C | 1.47E-7 Ω·m |
20.0 °C | 2.11E-7 Ω·m | |
100.0 °C | 2.59E-7 Ω·m | |
200.0 °C | 3.3E-7 Ω·m | |
300.0 °C | 4.16E-7 Ω·m | |
400.0 °C | 5.2E-7 Ω·m | |
500.0 °C | 6.41E-7 Ω·m | |
600.0 °C | 7.85E-7 Ω·m | |
Magnetic
| Property | Value | Comment |
|---|---|---|
Curie temperature | 770 °C | Typical for Low Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.02 % |
Carbon | 0.16 - 0.23 % |
Manganese | 0.4 - 0.75 % |
Phosphorus | 0.04 % |
Silicon | 0.28 % |
Sulfur | 0.04 % |
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