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Weathering steel is widely used in railways, bridges, high-rise buildings, ships and so on. Here we only discuss the weathering steel for ships. Using weathering steel can improve the service life of ships. In the service life cycle, it can also reduce the number of anti-corrosion treatment of ships and reduce the maintenance cost of ships. The weathering low alloy marine steel has high strength, high toughness and good weldability by aging precipitation strengthening of Cu and alloying of Nb, Ti and other elements.
The main defects are reddish brown fine lines along the rolling direction and fine warped skin. These two morphologies are sometimes accompanied by one of them, and the upper surface is usually more serious than the lower surface. The defects are distributed in parallel along the rolling direction with uncertain spacing, and the single defect is about 5-50mm short line. The development and application of aging steel containing Cu are limited by the hot cracking phenomenon of Cu. The addition of Ni can reduce the risk of copper embrittlement, but the cost is high.
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.
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BBN SHIP STEEL FACTORY
