DNV-GL, VL AH690 and DNV-GL, VL A690 are specialized grades of marine steel plates, renowned for their exceptional strength and durability in harsh oceanic environments. These high-grade steel plates are essential components in the construction of ships and marine structures, ensuring their safety and reliability under extreme conditions.

1. Chemical Composition

The chemical composition of DNV-GL, VL AH690 and VL A690 steel plates is carefully controlled to achieve the desired mechanical properties. These steels primarily consist of iron, with the addition of carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum, and other alloying elements. The precise balance of these elements ensures excellent corrosion resistance, toughness, and weldability.

2. Mechanical Properties

The mechanical properties of these marine steel plates are exceptional. Both grades exhibit high yield strength and tensile strength, making them suitable for use in structures that require exceptional load-bearing capacity. Additionally, they possess good toughness and ductility, allowing them to withstand significant deformation without failing. The steel plates also exhibit excellent fatigue resistance, ensuring their long-term performance in cyclic loading conditions.

3. Heat Treatment State

The heat treatment state of DNV-GL, VL AH690 and VL A690 steel plates is carefully controlled to optimize their mechanical properties. Typically, these steels undergo normalizing or quenching and tempering processes to achieve the desired microstructure and mechanical properties. This heat treatment ensures that the steel plates have uniform properties and excellent performance in service.

4. Size Range

DNV-GL, VL AH690 and VL A690 steel plates are available in a wide range of thicknesses, widths, and lengths to meet the varying needs of shipbuilders and marine engineers. The thickness of these plates typically ranges from several millimeters to hundreds of millimeters, depending on the specific application and design requirements.

5. Impact Testing

Impact testing is a crucial aspect of ensuring the reliability of marine steel plates. DNV-GL, VL AH690 and VL A690 steel plates undergo rigorous impact testing to assess their ability to withstand low-temperature conditions. This testing involves subjecting the steel plates to sudden impact loads at subzero temperatures to evaluate their toughness and resistance to cracking.

6. Main Application Scenarios

DNV-GL, VL AH690 and VL A690 steel plates are widely used in various marine applications. They are commonly employed in the construction of hulls, decks, and other structural components of ships and offshore platforms. Their excellent strength and corrosion resistance make them suitable for use in both freshwater and saltwater environments. Additionally, their good weldability allows for efficient and reliable fabrication of complex marine structures.

7. Supply Cases by TJC Steel

TJC Steel, a leading supplier of marine steel plates, has extensive experience in supplying DNV-GL, VL AH690 and VL A690 steel plates to various shipbuilding and marine engineering projects. The company maintains a strict quality control system to ensure that the steel plates meet the highest standards of quality and performance. TJC Steel has successfully supplied these steel plates to numerous shipbuilders and offshore construction companies, contributing to the safe and reliable operation of their vessels and platforms.

In conclusion, DNV-GL, VL AH690 and VL A690 steel plates are highly specialized marine steel products that offer exceptional strength, durability, and corrosion resistance. Their precise chemical composition, mechanical properties, heat treatment state, and size range make them suitable for a wide range of marine applications. TJC Steel, as a reliable supplier, provides these steel plates to meet the demands of the marine industry, ensuring the safety and reliability of marine structures.