Ship Plater

General industrial ship plates are made of steel. So what is the specific model of this steel? What is the difference between steel plate and ordinary steel plate? Today's China good stuff Xiaobian will give you a detailed introduction.

Steel plate for hull structure is abbreviated as marine plate. Due to the harsh working environment of the ship, the ship shell is subject to chemical corrosion, electrochemical corrosion, marine organisms and microorganisms; The hull bears large wind wave impact and alternating load; The ship shape makes its processing method complex, so the requirements for hull structure steel are strict. First, good toughness is the most critical requirement. In addition, it is required to have high strength, good corrosion resistance, welding performance, processing and forming performance and surface quality. Structural steel for hull is divided into general thickness steel and high strength steel. General strength steel is divided into four grades A, B, C and d according to quality; High strength steel is divided into two strength grades and three quality grades; Ah32, dh32, EH32, AH36, DH36 and EH36. We mark them as 32 and 36 for two strength levels and ah, DH and eh for three quality levels.

Therefore, the difference between ship plate steel and ordinary steel plate is mainly to resist chemical corrosion and microbial corrosion; The hull can withstand large wind wave impact and alternating charge; Also have good toughness; Good welding performance; Easy plasticity, etc.

Marine steel plate material, general strength hull structure steel is divided into four grades A, B, C and D. the yield strength (not less than 235n / mm ^ 2) and tensile strength (400 ~ 520n / mm ^ 2) of these four grades of steel are the same, but the impact energy at different temperatures is different; High strength hull structural steel is divided into strength grades according to its minimum yield strength, and each strength grade is divided into grades A, D, e and F4 according to its impact toughness.

Marine steel refers to the steel used to manufacture ships and inland river hull structures, usually high-quality carbon steel and high-quality low-alloy steel. Marine steel needs certain strength, toughness, low temperature resistance, corrosion resistance and good welding performance.

Common hull structural steels include general strength steel (Grade A, B, D and E) and high strength steel (grade ah32, dh32, EH32, AH36, DH36 and EH36) specified in gb712; High quality carbon steel (CIO, C20) steel pipes for ships specified in GB5312; Class A and B steel ball flat steel for shipbuilding specified in gb9945.

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