The difference between cold rolled steel sheet and hot rolled steel plate. The carbon content of LR DH36 watercraft structural steel, hot rolled steel plate is slightly higher than that of cold rolled steel sheet. In the case of little difference in composition, the density of cold rolled steel sheet and hot rolled steel plate is the same. Hot rolled steel plate has characteristics of low hardness, easy processing and good ductility. Cold rolled steel sheet has high hardness, and it is relatively difficult for processing. But it is not easy to deform and has high strength. Hot rolled steel plate can be made into alloy steel plate by adding other elements, and its properties are also excellent compared with other high-quality steel plates.
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The Shipbuilding steel plate can be divided into general strength LR DH36 watercraft structural steel structural steel and high strength structural steel according to its minimum yield point strength level.BBN supplies and exports 3 types of ship steel, Ordinary Strength Steel Plate, High-tensile Strength Steel Plate and LR DH36 watercraft structural steel Extra High-tensile Strength Steel Plate. All steel plate product can be manufactured according to Society LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS, etc.
Magnetic particle flaw detection is only suitable for detecting surface defects, which means that by laying magnetic powder on the surface of the equipment and using its aggregate shape on the surface defects of the magnetic material equipment to determine the position, size and shape of the defect. This LR DH36 watercraft structural steel method has a relatively low cost and is easy for steel production enterprises to adopt in batches. However, for special steel profiles with deeper thickness, whether this method is used to detect hidden defects is yet to be verified.
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