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1. Background of AH550, DH550, EH550, FH550 steel grades:
With the development of large-scale ship tonnage, the domestic production technology of high-strength and extra-thick plate steel is obviously insufficient. The main reason is that the high-strength and toughness ship plate steel is difficult in the production process and the quality requirements are high. In order to meet the needs of the domestic shipbuilding industry, high-tech, high-value-added ship plate steel companies all hope to promote product upgrades through technological improvement and vigorous research and development.
2. Introduction to AH550, DH550, EH550, FH550 steel plate:
CCS/NV/GL550 is structural steel for ships and marine engineering, divided into four quality grades: A, D, E, F, namely AH550, DH550, EH550, FH550, H is high-strength building materials, and 550 is min. yield strength.
3. AH550 steel plate executive standard: GB711
The standard is used in the manufacture of steel plates with a thickness of not more than 150mm for navigating ships, fishing boats and marine engineering structures in ocean, coastal and inland waterway areas.
4. Delivery status of AH550, DH550, EH550, FH550 steel plate: thermomechanical rolling (TMCP), quenching and tempering, thermomechanical rolling + tempering (TMCP+T).
5. AH550, DH550, EH550, FH550 steel plate size, shape, weight and allowable deviation:
The size, shape, weight and allowable deviation of the steel plate should meet the requirements of GB/T709, and the deviation under the thickness is -0.30mm.
6. AH550, DH550, EH550, FH550 steel plate classification society certification:
AH550, DH550, EH550, and FH550 ship plates are high-strength ship plates, which can be produced according to user requirements of ship steels in different countries, such as the United States, Norway, Japan, Germany, France, etc. The classification society certification is as follows:
China CCS, United States ABS, Germany GL, France BV, Norway DNV, Japan NK, United Kingdom LR, Italy RINA, Korea KR, Norway DNV merged with Germany: VL.
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
