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While there is a plethora of materials used in shipbuilding, steel remains the most widely used. And for good reason: Steel is strong enough to withstand the fatigue that a lifetime spent on the open seas will thrust upon it. In the shipbuilding industry, steel is categorized by four grades of toughness:
GRADE A STEEL:This mild steel is used for ship structures measuring less than 20 mm, such as bulkheads.
GRADE B STEEL:This slightly stronger steel is used for structures measuring 20 to 25 mm.
GRADE D STEEL:Grade D steel is strong enough to resist cracks and is used for structures that measure more than 25 mm thick.
GRADE E STEEL:This type of steel is heat treated for the ultimate strength and is used for structures measuring 50 mm or more, making it the ideal material for high-stress parts of the ship, such as the keel.
Property of Grade A, B, D, E shipbuilding steel plate
| Property | Grade A | Grade B | Grade D | Grade E |
| % of Carbon | 0.21 max | 0.21 max | 0.21 max | 0.18 max |
| % of Manganese | 2.5 times %C min | 0.8 times %C min | 0.6 times %C min | 0.7 times %C min |
| % of Silicon | 0.5 max | 0.35 max | 0.1 – 0.35 | 0.1 – 0.35 |
| % of Phosphorous | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
| % of Sulphur | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
| % of Aluminum | – | – | 0.015 min | – |
| Ultimate Tensile Strength (N/mm2) | 400-520 | |||
| Yield Strength (N/mm2) | 235 | |||
| % Elongation | 22 | |||
| Temperature at which Impact test is done (deg Cel) | NA | 0 | -20 | -40 |
BBN steel: Steel for Shipbuilding
BBN steel is one of the world’s leading suppliers of steel for shipbuilding. All our grades are certified to ASTM/ASME specification and can be classified according to any of the relevant societies. Our steels for shipbuilding include:
AH36: A common steel for shipbuilding that is typically formatted as heavy plates and fabricated surfaces for large, heavy-duty vessels like commercial ships and bulk carriers.
DH36: Another common shipbuilding steel used to construct and retrofit ship superstructures.
EH36: A desirable steel for shipbuilding that is available in prefabricated sections and heavy plates for hull construction and superstructure design.
If you would like to learn more about our steel for shipbuilding, please contact us.
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
If you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting, demand table submission, e-mails and telephones. Our staff shall wholeheartedly provide product information, application knowledge and good service for you.
BBN SHIP STEEL FACTORY
