EN 10216-2 Grade 8MoB5-4 normalized or normalized formed (+N)

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Description

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.

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

7.8 - 7.9 g/cm³

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Typical for Molybdenum Steel

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

200 - 215 GPa

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Typical for Molybdenum Steel

Elongation

20.0 °C

19 %

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Elongation, transverse

20.0 °C

17 %

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Poisson's ratio

23.0 °C

0.29 [-]

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Typical for Molybdenum Steel

Tensile strength

20.0 °C

540 - 690 MPa

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Tensile strength, transverse

20.0 °C

540 - 690 MPa

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Yield strength Rp0.2

20.0 °C

400 MPa

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100.0 °C

368 MPa

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150.0 °C

368 MPa

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200.0 °C

368 MPa

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250.0 °C

368 MPa

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300.0 °C

368 MPa

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350.0 °C

368 MPa

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400.0 °C

368 MPa

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Yield strength Rp0.2, transverse

20.0 °C

400 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1.29E-5 1/K

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Typical for Molybdenum Steel

Max service temperature, long

200 - 550 °C

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Melting point

1382 - 1529 °C

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Typical for Molybdenum Steel

Specific heat capacity

23.0 °C

456 J/(kg·K)

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Typical for Molybdenum Steel

Thermal conductivity

23.0 °C

37 - 48 W/(m·K)

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Typical for Molybdenum Steel

Chemical properties

PropertyValue

Aluminium

0.06 %

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Boron

2E-3 - 6E-3 %

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Carbon

0.06 - 0.1 %

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Chromium

0.2 %

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Copper

0.3 %

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Manganese

0.6 - 0.8 %

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Molybdenum

0.4 - 0.5 %

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Phosphorus

0.03 %

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Silicon

0.1 - 0.35 %

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Sulfur

0.01 - 0.02 %

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Titanium

0.06 %

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