CCSDH420 marine engineering steel plate, CCSDH420 ship plate specifications and sizes, CCSDH420 stee

CCSDH420 marine engineering steel plate, CCSDH420 ship plate specifications and sizes, CCSDH420 stee

CCSDH420 is China Classification Society certification of ultra-high strength ship and marine engineering structural steel, D is grade -20 °C, H is high-strength building materials, 420 is the lower yield strength, there are Z-direction requirements of the steel plate in the suffix Z25, Z35, the use of ultra-high strength ship and marine engineering structural steel.

CCSDH420 ship plate fixed rolling # Wugang Xiangyang #

CCSDH420 steel plate implementation of the national standard: GB711-2011

GB712-2011 Structural Steel for Ships and Offshore Engineering Structural Steel Code The trademarks are: A, B, D, E, AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, AH420, DH420, EH420, AH460, DH460, EH460, FH460, AH500, DH500, EH500, FH500, AH550, DH550, EH550, FH550, FH550, AH620, DH620,EH620,FH620,AH690,DH690,EH690,FH690

CCSDH420 Use: Size, shape, weight and allowable deviation of structural steel

CCSDH420 for ultra-high strength ships and marine engineering: steel plate size, shape, The weight and allowable deviation should be in line with the provisions of GB709, and the deviation under the thickness is -0.3mm

CCSDH420: the content of basic elements such as C, Si, Mn, N and so on is equivalent to the provisions of the ship regulations (as loose as possible), leaving enough space for the manufacturer to adopt different process routes and different delivery conditions for different grades, different thicknesses and different performance requirements. This standard only stipulates the upper limit, which not only reflects the principle of maximum freedom of the standard, but also creates conditions for the production plant to choose the process route with the lowest production cost.

Marine steel is commonly used for welding, and the composition design is generally designed to reduce carbon equivalent, so as to improve the weldability of the steel and increase the toughness of the heat-affected zone.

CCSDH420 Strict control of P and S harmful elements in steel to ensure the quality of structural steel. The low sulfur and low phosphorus control can significantly improve the fracture toughness of structural steel, improve the castability of steel and minimize the crack of the casting billet, and can also reduce the thermal deformation resistance of the steel during the rolling process and improve the plasticity of the steel.

The P and S content specified in this standard is moderate compared with the national standard for special low-alloy high-strength steel, and the actual production control is stricter than that specified in this standard.