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The purity has great influence on the plasticity, toughness, weldability, ductile brittle transition temperature and anti explosion performance of submarine steel, so the submarine steel is usually produced by ultra pure smelting process.
First, the raw materials should be selected, the scrap steel with low harmful element content or the blast furnace iron with low phosphorus sulfur after pretreatment should be selected as the raw material for steelmaking. Then, the electric furnace or converter plus vacuum refining method should be used to smelting, so as to greatly reduce the content of sulfur and phosphorus and other inclusions and harmful gases in the steel to obtain high purity steel.
In the developed countries, the United States is the representative of the western countries, which use electric furnace or converter to add vacuum refining method to produce submarine steel; The former Soviet Union used converter smelting method to cast electrodes, and then the electroslag heavy trust method was used to produce submarine steel.
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
