Marine steel plate refers to structural steel used in ship building. It is considered a marine grade and must be able to resist corrosive effects that are common in a water environment. To achieve this, special alloying elements are added to these grades in order to defend agaist corrosion. While most carbon steel is not suited for marine environments, there are several marine grade carbon steels that have been approved by the different societies for shipbuilding applications. Structural steel for ship hulls is divided into strength classes according to its minimum yield strength: general strength structural steel and high strength structural steel. Maine steel plate refers to hot rolled steel plate produced in accordance with the requirements of the classication society for the construction of ship hull structures. There are 9 main classification societies in worldwide: A.B.S American Bureau of Shipping B.V. Bureau Veritas C.C.S. China Classification Society D.N.V Det Norske Veritas G.L. Germanischer Lloyd K.R. Korean Register of Shipping L.R. Lloyd鈥檚 Register of Shipping N.K. Nippon Kaiji Kyokai R.I.N.A Registro Italiano Navale RINA A steel is a kind of hot rolled general tensile strength steel. General-strength LR shipbuilding steel comes in 12 grades of 3 strengths, Grade A is one of the grades. Grade A steel plates have yield strength of 235 MPa, and ultimate tensile strength of 400-520 MPa. All the RINA A shipbuilding Steel offered by Gnee can be certificated by Lloyd鈥檚 Register of Shipping (RINA). RINA is a founding member of the International Association of Classification Societies (IACS), formed in 1968. The RINA fleet is recognized by approximately 116 international flag authorities. RINA integrated services for the complate shipping cycle including design, building, shipyard management, inspection and testing of materials/components and regular inspections to maintain the class are used by freight, ferries, ro-ro, passenger ships, yachts, cruise ships, navy, LGN and other specialist carrier vessels. Grade A steel is the impact force subjected to 20 掳C Grade B steel impact force at 0 掳C Grade D steel impact force at -20 掳C Grade E steel impact force at -40 掳C Shot Blasting Service Shot blasting is a method used to clean or polish steel when enhanced surface finishes are required. Shot blasting is used in almost every industry we serve. Especially in shipbuilding, rail, structural fabrication and more. Specifications Range Thickness: 2.5-120mm Width: 1000-3000mm Length: As request Chemical Composition Steel gradeCSiMnPSAls Grade A鈮?.21鈮?.50鈮?.5C鈮?.035鈮?.035- Grade B鈮?.21鈮?.350.8-1.2鈮?.035鈮?.035- Grade D鈮?.21鈮?.350.6-1.2鈮?.035鈮?.035鈮?.015 Grade E鈮?.18鈮?.350.7-1.2鈮?.035鈮?.035鈮?.015 Processing for Different Grades Grade D, E (DH32, DH36, EH 32, EH 36) Grade D and E series (inlcuding AH32/36, DH32, DH36, EH32, EH36) shipbuilding steel plates require good low temperature toughness and good welding performance. The production high-strength shipbuilding steel plate needs to be normalized by means of controlled rolling and controlled cooling or heat treatment processes with more complete equipment. At the same time, the internal steel purity of the supplied billets is required to be high, especially the content of S, P, N, 0 and H in the steel should be strictly controlled. Alloy Elements Added to Improve Toughness In order to ensure the performance of high-strength ship plates, micro-alloying technology is adopted. By adding Nb, V, Ti and other alloying elements to the steel, combined with the controlled rolling process, the grain is refined and the toughness is improved. Direction of Development for Shipbuilding Plate High strength, high specification, with the ship's large-scale and safety, and changes in coating specifications, the demand for ordinary A-class panels is gradually reduced, and the demand for high-strength panels is increasing, which is concentrated in large ships of 5m wide. Plate, 200-300mm thickness special thick ship board. Mechanical Properties Steel gradeYield point MPaTensile point MPaElongation %Temperature 掳CV-type impact test Akv/J 鈮?0MM 50-70MM70-100MM Grade A235400-520鈮?220-34/2441/27 Grade B235400-520鈮?2027/2034/2441/27 Grade D235400-520鈮?2-2027/2034/2441/27 Grade E235400-520鈮?2-44027/2034/2441/27RINA Marine Steel website:http://www.shipbuilding-plate.com/shipbuilding-steel-plate/rina-marine-steel/