Corrosion resistance of DNV EH32 shipbuilding steel plate

DNV EH32 shipbuilding steel is a steel with superior corrosion resistance, known for its excellent corrosion resistance, wear and tear resistance, and ease of fabrication. DNV is mean DET NORSKE VERITAS, DNV EH32 shipbuilding steel is a kind of high strength low alloy structural steel, and its properties are mainly determined by its chemical composition and microstructure. Compared with ordinary carbon steel and alloy structural steel, its corrosion resistance is higher, wear resistance and fatigue strength are significantly lower.

Grade	Thickness(mm)	MinYield(Mpa)	Tensile(Mpa)	Elongation (%)	Min Impact Energy
DNV Grade EH32	8mm-50mm	Min 315Mpa	440-590Mpa	22	-40	34J
	51mm-70mm	Min 315Mpa	440-590Mpa	22	-40	38J
	71mm-100mm	Min 315Mpa	440-590Mpa	22	-40	46J

In order to ensure the excellent corrosion resistance of DNV EH32 shipbuilding steel, at least four aspects need to be considered in the production process: chemical composition of steel, processing technology, surface treatment and environment.

1. According to the requirements of the relevant standards and customers, the chemical composition of the DNV EH32 shipbuilding steel is determined. Generally speaking, the content of Mn and P should be strictly controlled, and the content of C and S should be reduced as much as possible.

2. The strict manufacturing process is the guarantee of the excellent mechanical properties of shipbuilding steel. The production of DNV EH32 shipbuilding steel should adopt the advanced rolling equipment, strict process control and precise process requirements, so as to improve the dimensional accuracy and surface quality of the steel plate products.

3. For DNV Grade EH32 marine steel, it is necessary to carry out surface treatment and coating before and after the use, including blasting, rust removal, painting, cathodic protection and so on.

4. In the environment of use, in addition to meeting the requirements of certain atmospheric environments, it is necessary to strengthen antifouling measures, pay attention to the protection of docks and ships, and pay attention to the prevention and control of oil pollution.
DNV EH32 marine steel

Through the above four aspects, we can ensure the excellent corrosion resistance performance of DNV EH32 marine hull steel in the actual working environment. The ultra-high strength steel used in marine engineering and the full consideration of system electron richness, we can give full play to their better adoption performance and improve the corrosion reliability of marine engineering.

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