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The structure and comprehensive properties of high strength EH36 hull structural steel plate produced with Nb as microalloying element are obviously better than those of high strength EH36 hull structural steel plate produced without Nb as microalloying element. The average yield strength, tensile strength, elongation and longitudinal impact at - 40 C were increased by 32 MPa, 16 MPa, 2% and 128 J respectively.
High strength EH36 Hull Structural Steel plate produced by Nb as microalloying element has moderate strength, abundant low temperature impact and thickness direction properties, uniform structure and fine grain size, suitable welding, excellent comprehensive properties, good strength and impact toughness.
Controlled rolling plus normalizing process is the best process for obtaining ideal strength and toughness of high strength EH36 hull structural steel plate, which can fully play the role of grain refinement and precipitation strengthening of micro-niobium alloy.
Nb, as a microalloying element, has a stable production process for low temperature and high strength EH36 hull structural steel plate, and its physical quality exceeds the requirements of ship regulations of various countries. It lays a foundation for the future production of 40 kg, F grade and ultra-high strength hull plate by microalloying.
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
