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Low carbon and nickel, chromium, molybdenum, vanadium or nickel, chromium, molybdenum, copper, niobium series are mostly used for submarine steel. The main alloying elements added in steel are: carbon, nickel, chromium, molybdenum, vanadium, copper, niobium, etc.
Carbon, as a strengthening element, can effectively improve the strength of steel, but can significantly reduce the toughness of steel and damage the weldability of steel. In the submarine steel of the world, the highest carbon content is 0.18%, and the lowest carbon content is 0.06%. The carbon content of 0.10% is usually used to obtain good comprehensive properties.
Nickel, an important alloying element in submarine steel, plays a weak role in solution strengthening, but can significantly improve the toughness of the steel. With the increase of iron content, the ductile brittle transition temperature of steel decreases greatly, which can ensure the good low temperature toughness and explosion resistance of submarine steel. It can also improve the hardenability and corrosion resistance of the steel. The shackle content of submarine steel is usually in the range of 2.0% to 5.25%.
Vanadium is a strong carbonitride forming element. The strength of submarine steel can be improved by precipitation strengthening, but the toughness of steel can be lost at the same time. Therefore, the vanadium content in submarine steel is usually less than 0.10%.
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
