NK Class A47 is a high-strength marine-grade steel certified by ClassNK for demanding shipbuilding and offshore applications. With a minimum yield strength of 460 MPa and tensile strength of 570-720 MPa, it is engineered for critical structural components such as ice-strengthened hulls, offshore platforms, and heavy-load decks.
The steel undergoes stringent Charpy V-notch impact testing at -40°C, ensuring superior fracture toughness in Arctic environments. Compliant with ClassNK Rules and Guidelines, it offers exceptional weldability, fatigue resistance, and corrosion durability, making it ideal for LNG carriers, polar vessels, and deep-sea installations. NK A47 is comparable to ABS A47 and LR AH47, meeting the highest international standards for safety and performance in extreme maritime conditions.
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