Address:Zhengzhou city in China.
Phone:0086-371-86151827
Email:
DH40 is an important grade of marine high-strength low-alloy steel, designed for marine structures bearing both low temperatures and heavy loads. It passes low-temperature impact tests and high-strength verification, suitable for large ships in cold sea areas.
DH40's core feature is maintaining high strength and toughness in low-temperature environments, with a yield strength ≥390MPa and significantly higher impact energy at -40℃ than ordinary steel, resisting brittle fracture at low temperatures. Its weldability is specially optimized to ensure joint strength even under low-temperature welding conditions. Chemically, it contains ≤0.18% carbon, 1.00%-1.80% manganese, and niobium, titanium to refine grains and enhance low-temperature toughness, with phosphorus and sulfur ≤0.025%.
Applications cover heavy-duty ships in high-latitude regions, such as polar ice-breaking cargo ships and drilling ships operating in low-temperature seas, mainly used in hull load-bearing structures, deck girders, and bulkhead stiffeners. In complex working conditions involving both low temperatures and heavy loads, DH40 balances strength and toughness, ensuring structural safety and reliability.
Address: Zhengzhou city in China.
Phone: 0086-371-86151827
Email: 
