What is DNV Grade D690 Steel?

In the realm of shipbuilding, the utilization of high-quality steel plates is paramount for ensuring the structural integrity and safety of vessels. Among the most trusted and reliable standards in this domain, DNV-GL-certified VL DH690 and D690 steel plates stand out for their exceptional properties. These grades of steel, specifically designed for shipbuilding applications, exhibit superior chemical composition, mechanical properties, and heat treatment characteristics, making them ideal for a wide range of marine structures.
The chemical composition of VL DH690 and D690 steel plates is carefully controlled to ensure optimal performance. These steels are typically composed of carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum, and vanadium, with precise allowances for each element to achieve the desired mechanical properties. The balanced chemistry allows for excellent weldability, corrosion resistance, and high strength, essential for marine environments.

Impact Testing of DNV D690 Shipbuilding Steel Plate

Impact testing is a crucial part of the quality assurance process for VL DH690 and D690 steel plates. These tests are performed to assess the steel’s ability to resist low-temperature cracking, which is particularly important in cold environments. The steel plates typically meet or exceed the impact toughness requirements specified by DNV-GL, ensuring their reliability in extreme conditions.

DNV D690 Steel Applications

The main applications for VL DH690 and D690 steel plates include the construction of hulls, decks, bulkheads, and other structural components of ships and marine vessels. Their high strength and corrosion resistance make them suitable for use in both freshwater and saltwater environments.