EN 10216-2 Grade 8MoB5-4 (Normalized/Normalized Formed +N): High‑Temperature Seamless Tubes for Boilers, Pipelines & Pressure Vessels
Seamless tubes of the high-temperature 8MoB5-4 are used in steam boiler and pipeline construction, pressure vessel and apparatus engineering, especially in chemical industry and power station construction at temperatures from approx. 200 °C to maximum 400 °C and simultaneously high pressures. The total load and the special scaling circumstances can decrease or increase the temperature limit. Weldability is available.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.8 - 7.9 g/cm³ | Typical for Molybdenum Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 215 GPa | Typical for Molybdenum Steel |
Elongation | 20.0 °C | 19 % | |
Elongation, transverse | 20.0 °C | 17 % | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Molybdenum Steel |
Tensile strength | 20.0 °C | 540 - 690 MPa | |
Tensile strength, transverse | 20.0 °C | 540 - 690 MPa | |
Yield strength Rp0.2 | 20.0 °C | 400 MPa | |
100.0 °C | 368 MPa | ||
150.0 °C | 368 MPa | ||
200.0 °C | 368 MPa | ||
250.0 °C | 368 MPa | ||
300.0 °C | 368 MPa | ||
350.0 °C | 368 MPa | ||
400.0 °C | 368 MPa | ||
Yield strength Rp0.2, transverse | 20.0 °C | 400 MPa | |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.29E-5 1/K | Typical for Molybdenum Steel |
Max service temperature, long | 200 - 550 °C | ||
Melting point | 1382 - 1529 °C | Typical for Molybdenum Steel | |
Specific heat capacity | 23.0 °C | 456 J/(kg·K) | Typical for Molybdenum Steel |
Thermal conductivity | 23.0 °C | 37 - 48 W/(m·K) | Typical for Molybdenum Steel |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 0.06 % |
Boron | 2E-3 - 6E-3 % |
Carbon | 0.06 - 0.1 % |
Chromium | 0.2 % |
Copper | 0.3 % |
Manganese | 0.6 - 0.8 % |
Molybdenum | 0.4 - 0.5 % |
Phosphorus | 0.03 % |
Silicon | 0.1 - 0.35 % |
Sulfur | 0.01 - 0.02 % |
Titanium | 0.06 % |
Metal
- EN 10225 S355G14 Steel – Normalized or Normalized Formed (+N) for Offshore Structures
- EN 10225 Grade S355G15 – Normalized or Normalized‑Formed Steel for Offshore Applications
- EN 10225 Grade S355G13 – Normalized/Normalized Formed (+N) for Offshore Structures
- EN 10216-2 Grade 16Mo3: Normalized or Normalized Formed Tubes for High-Temperature Applications
- EN 10216-2 Grade St 45.8: High‑Temperature Normalized Tube Steel (+N) for Seamless Tubes
- EN 10217-2 Grade St 37.8: High‑Temperature Normalized Tube Steel for Industrial Use
- EN 10216-2 Grade P195GH – Normalized or Normalized Formed (+N) Seamless Tubes
- EN 10216-2 Grade P235GH Seamless Tubes – Normalized or Normalized Formed (+N)
- EN 10216‑2: Grade P265GH (Normalized/Normalized Formed +N) – High‑Temperature Seamless Tubes for Power and Chemical Industries
- EN 10216-2 Grade 19Mn5: Normalized or Normalized Formed Steel for High-Temperature Applications (+N)