Effect of carbon and silicon elements on DH36 steel

The key performance index of DH36 steel plate is the low temperature impact toughness of DH36 steel plate, which requires the impact energy at -20°C to be greater than or equal to 34J.

Generally speaking, the lower the carbon content, the better the low-temperature impact toughness of the steel plate, but when the carbon content is low to a certain extent, the oxygen content at the end of the converter will inevitably increase significantly, resulting in an increase in inclusions in DH36 steel plate, which in turn will reduce the low temperature impact toughness of the steel. At the same time, carbon acts as an interstitial solid solution element in DH36 steel plate, which can cause strong distortion of the crystal lattice, which has a great influence on the strength of DH36 steel. Too low carbon content will greatly reduce the strength of DH36 steel.

In order to prevent the overoxidation of DH36 molten steel during the smelting process and ensure that the strength of DH36 steel meets the standard requirements, the middle and lower limits of carbon content are controlled, which is conducive to the fine-grain strengthening and precipitation strengthening of niobium, and the toughness and strength of DH36 steel are simultaneously improved. The lower carbon content is also conducive to maintaining excellent welding performance.

Silicon is almost completely dissolved in ferrite in DH36 steel. Silicon can significantly increase the yield strength and tensile strength of DH36 steel, but it will also reduce the elongation and impact toughness, and reduce the weldability of DH36 steel plate.


Hot ProductsSee More+

  • Shipbuilding steel pipe

    Shipbuilding steel pipe

    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.

  • Shipbuilding use angle steel

    Shipbuilding use angle steel

    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.

  • Shipbuilding flat bar

    Shipbuilding flat bar

    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

    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.

  • FH40 Shipbuilding steel plate

    FH40 Shipbuilding steel plate

    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.

  • EH40 Shipbuilding steel plate

    EH40 Shipbuilding steel plate

    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.

You can contact us through the following ways:

If you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting, demand table submission, e-mails and telephones. Our staff shall wholeheartedly provide product information, application knowledge and good service for you.

  • Hotline:0086-371-86151827
  • Fax:    0086-371-86011881
  • E-mail:[email protected]