Naval B

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Description

These steel grades are generally supplied under the supervision of classification societies, in accordance with the appropriate regulations in each case. Plates can be supplied as rolled, shotblasted or shotblasted and painted.

Depending on the part of the ship where the steel is to be used, toughness values at different temperatures and/or through-thickness mechanical properties can be required. Weldability is often a key requirement.

Related Standards

Equivalent Materials

This material data has been provided by ArcelorMittal.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
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.

Ashby charts

Properties

Mechanical

PropertyTemperatureValueComment

Charpy impact energy

0 °C

20 J

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min. | for thickness 5-50 mm | Transverse

0 °C

24 J

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min. | for thickness 50-70 mm | Transverse

0 °C

27 J

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min. | for thickness 5-50 mm

0 °C

27 J

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min. | for thickness 70-100 mm | Transverse

0 °C

34 J

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min. | for thickness 50-70 mm

0 °C

41 J

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min. | for thickness 70-100 mm

Elongation

22 %

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min. A5.65√So | for thickness 5-100 mm | Transverse

Tensile strength

400 - 520 MPa

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for thickness 5-100 mm | Transverse

Yield strength

235 MPa

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min. | for thickness 5-100 mm | Transverse

Chemical properties

PropertyValueComment

Carbon

0.21 %

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max.

Chromium

0.2 %

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max.

Copper

0.3 %

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max.

Manganese

0.6 %

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min.

Molybdenum

0.08 %

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max.

Nickel

0.4 %

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max.

Other

0.12 %

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max. | Nb + Ti + V

Phosphorus

0.035 %

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max.

Silicon

0.35 %

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max.

Sulfur

0.035 %

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max.

Technological properties

Property
Application areas

Steel for shipbuilding can be used for the entire range of shipbuilding applications e.g. for the hull and interior of ships

Chemical composition

For B grade, the carbon + 1/6 of the manganese content should not exceed 0.40%. The steel should contain aluminium, niobium, vanadium or other suitable grain-refining elements, either singly or in any combination. When these elements are used singly, the steel should contain the specified minimum content of the grain-refining element (0.02% ≤ Nb ≤ 0.05%, 0.05% ≤ V ≤ 0.10%, Ti ≤ 0.02%). When used in combination, the specified minimum content of each element is not applicable.

Delivery condtion

For the dimensions available please visit Dimension tables (see Table A).

Other

Agreements

The maximum thickness approved in shipbuilding specifications can be communicated on request by your sales agent.


Available options

Options available (after prior agreement):

  • Reduced carbon equivalent value
  • Ultrasonic testing
  • Through-thickness properties (Z test)
  • Shotblasting or shotblasting and painting
  • Suitability for cold bending
  • Other options specified in the standard


    Mechanical properties

    Charpy V notch impact test specimens should be taken in the longitudinal direction. Transverse test specimens are not usually required. Transverse test results for plates and wide flats should be guaranteed by the supplier.