1.High strength: Ship building steel plateneeds to withstand the impact of external forces such as ship weight, cargo weight and wind and waves, so it must have sufficient strength to ensure the safety and stability of the structure.
2.Good resilience: It needs to maintain good resilience when encountering unexpected situations such as extreme weather or collision, so as to absorb and disperse energy and reduce the risk of structural damage.
3.Corrosion resistance: ships operate in harsh environments such as humidity and salt spray for a long time. This steel plate must have good corrosion resistance to extend service life and reduce maintenance costs.
4.Excellent weldability: in the process of ship manufacturing, a large number of steel plates need to be welded together. Therefore, the steel plate must have good weldability to ensure the strength and reliability of the weld.
Standard | ASTM, AISI, GB, JIS, DIN, BS |
Certification | ISO |
Surface Treatment | Blackface |
Technique | Hot Rolled |
Special Use | High-strength Steel Plate |
Material Grade | Q235B/Q345b/Ss400/A36/St37,etc |
Thickness | 2~100mm |
Width | 1200~3000mm |
Length | 3-12m or Customized |
Sample | Avaliable |
Surface | Black |
Transport Package | Standard Exporting Packing or as Client′s Requirem |
Origin | Tianjin, China |
Production Capacity | 10000 Tons Per Month. |
Delivery Time | 7-15 days |
1.Raw material preparation
Material selection: High quality iron ore, scrap steel and alloying elements are selected as raw materials to ensure that the chemical composition and physical properties of steel plates meet Marine standards.
Pretreatment: The raw materials are crushed, screened and impurity removed to ensure the smooth progress of the smelting process.
2.Smelting
Blast furnace smelting: iron ore, coke, limestone and other raw materials into the blast furnace, through the reduction reaction to obtain molten iron.
Converter steelmaking: pour molten iron into the converter, add scrap steel and alloying elements, and adjust the chemical composition of molten steel through the process of oxygen decarbonization, phosphorus removal and sulfur removal.
Refining: Refining technologies such as vacuum degassing and argon blowing and stirring are used to further remove gases and inclusions in molten steel and improve the purity and quality of molten steel.
3.Rolling
Heating: The refined billet is fed into a heating furnace and heated to an appropriate temperature to ensure plasticity and deformation during rolling.
Blooming: Rolling of a heated billet into a thinner steel slab at a blooming mill.
Finishing rolling: The steel slab is rolled several times on the finishing mill, and the thickness and accuracy of Marine steel plate that meet the requirements are obtained by adjusting the rolling force, rolling speed and temperature.
4.Heat treatment
Quenching: The rolling steel plate is quickly heated to a certain temperature and then quickly cooled to improve the hardness and strength of the steel plate.
Tempering: the quenched steel plate is heated to a lower temperature, kept warm for a period of time and then cooled to eliminate the quenching stress and improve the toughness and plasticity of the steel plate.
5.Inspection and acceptance
Chemical composition analysis: using spectral analysis, chemical analysis and other methods to detect whether the chemical composition of the steel plate meets the standard.
Mechanical property test: tensile test, impact test, bending test, etc., to detect the strength, toughness, plasticity and other mechanical properties of steel plate.
Non-destructive testing: use ultrasonic testing, ray testing and other methods to check whether there are defects inside the steel plate.
Appearance inspection: check the surface quality of the ship plate, including cracks, inclusions, rust and other defects.