EN 10217-2 Grade St37.8 normalized or normalized formed (+N)

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) introduction

High temperature tube steel for welded tubes and tube products. Applicable up to 500 °C wall temperature for continuous operation.
Application:
vessel construction, apparatus construction, petrochemical industry

Equivalent material: ISO TW5, UNI Fe37, DIN 1.0315, EN 1.0315, ASTM C55

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) general

Property Temperature Value
Density 20.0 °C Density of 7.85 g/cm³

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) 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 1.22E-5 - 1.25E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.29E-5 - 1.3E-5 1/K -
- 300.0 °C Coefficient of thermal expansion of 1.34E-5 - 1.36E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.4E-5 - 1.41E-5 1/K -
- 500.0 °C Coefficient of thermal expansion of 1.43E-5 - 1.45E-5 1/K -
- 600.0 °C Coefficient of thermal expansion of 1.46E-5 - 1.49E-5 1/K -
Max service temperature - Max service temperature of 500 °C Typical for Carbon Steel
Max service temperature, long - Max service temperature, long of 0 - 500 °C -
Melting point - Melting point of 1480 - 1526 °C Typical for Low Carbon Steel
Specific heat capacity -100.0 °C Specific heat capacity of 423 J/(kg·K) -
- 20.0 °C Specific heat capacity of 461 J/(kg·K) -
- 100.0 °C Specific heat capacity of 479 - 500 J/(kg·K) -
- 200.0 °C Specific heat capacity of 499 - 540 J/(kg·K) -
- 300.0 °C Specific heat capacity of 517 - 580 J/(kg·K) -
- 400.0 °C Specific heat capacity of 536 - 620 J/(kg·K) -
- 500.0 °C Specific heat capacity of 558 - 690 J/(kg·K) -
- 600.0 °C Specific heat capacity of 587 - 780 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 56.9 W/(m·K) -
- 100.0 °C Thermal conductivity of 56.4 - 57 W/(m·K) -
- 200.0 °C Thermal conductivity of 53.5 - 54 W/(m·K) -
- 300.0 °C Thermal conductivity of 49.4 - 50 W/(m·K) -
- 400.0 °C Thermal conductivity of 45 - 45.2 W/(m·K) -
- 500.0 °C Thermal conductivity of 41.3 - 42 W/(m·K) -
- 600.0 °C Thermal conductivity of 37 - 37.6 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 15.7 mm²/s -
- 100.0 °C Thermal diffusivity of 14.5 mm²/s -
- 200.0 °C Thermal diffusivity of 12.9 mm²/s -
- 300.0 °C Thermal diffusivity of 11.2 mm²/s -
- 400.0 °C Thermal diffusivity of 9.6 mm²/s -
- 500.0 °C Thermal diffusivity of 7.9 mm²/s -
- 600.0 °C Thermal diffusivity of 6.3 mm²/s -

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) chemical

Property Value
Carbon Carbon of 0.17 %
Manganese Manganese of 0.4 - 0.8 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.1 - 0.35 %
Sulfur Sulfur of 0.04 %

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) magnetic

Property Value Comment
Curie temperature Curie temperature of 770 °C Typical for Low Carbon Steel

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 1.83E-7 Ω·m
- 100.0 °C Electrical resistivity of 2.27E-7 - 2.3E-7 Ω·m
- 200.0 °C Electrical resistivity of 2.95E-7 - 3E-7 Ω·m
- 300.0 °C Electrical resistivity of 3.8E-7 Ω·m
- 400.0 °C Electrical resistivity of 4.8E-7 - 4.81E-7 Ω·m
- 500.0 °C Electrical resistivity of 5.99E-7 - 6E-7 Ω·m
- 600.0 °C Electrical resistivity of 7.38E-7 - 7.4E-7 Ω·m

EN 10217-2 Grade St37.8 normalized or normalized formed (+N) mechanical

Property Temperature Value Comment
Elastic modulus -100.0 °C Elastic modulus of 217 GPa -
- 20.0 °C Elastic modulus of 212 GPa -
- 100.0 °C Elastic modulus of 207 GPa -
- 200.0 °C Elastic modulus of 199 - 200 GPa -
- 300.0 °C Elastic modulus of 192 GPa -
- 400.0 °C Elastic modulus of 183 - 184 GPa -
- 500.0 °C Elastic modulus of 175 GPa -
- 600.0 °C Elastic modulus of 164 - 166 GPa -
Elongation 20.0 °C Elongation of 25 % -
Elongation, transverse 20.0 °C Elongation, transverse of 23 % -
Poisson's ratio 20.0 °C Poisson's ratio of 0.28 [-] -
Shear modulus 23.0 °C Shear modulus of 82 GPa Typical for Low Carbon Steel
Tensile strength 20.0 °C Tensile strength of 360 - 480 MPa -
Yield strength Rp0.2 20.0 °C Yield strength Rp0.2 of 235 MPa -
- 200.0 °C Yield strength Rp0.2 of 185 MPa -
- 250.0 °C Yield strength Rp0.2 of 165 MPa -
- 300.0 °C Yield strength Rp0.2 of 140 MPa -
- 350.0 °C Yield strength Rp0.2 of 120 MPa -
- 400.0 °C Yield strength Rp0.2 of 110 MPa -
- 450.0 °C Yield strength Rp0.2 of 105 MPa -

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