Address:Zhengzhou city in China.
Phone:0086-371-86151827
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Fine-grain structural steel is a new type of high-strength steel, which is prepared by microalloying, controlled rolling and heat treatment. Its grain size is smaller than that of ordinary structural steel, so it has higher strength and toughness.
Characteristics of fine grain structural steel
High strength: Because of its small grain size, fine-grain structural steel has higher strength.
Good toughness: fine-grain structural steel has excellent toughness, even in the state of high strength can maintain elasticity and plasticity, not easy to brittle fracture.
Good fatigue resistance: fine-grain structural steel has good fatigue resistance and is suitable for structures and parts that require repeated loading.
Excellent weldability: fine grain structural steel has excellent weldability and is not easy to have cold cracks and hot cracks.
The chemical composition of fine-grain structural steels will vary according to the specific application and manufacturing requirements. For example, carbon steel fine-grain structural steel is mainly made of pure carbon steel or low alloy steel with trace alloying elements; Low-alloy high-strength fine-grain structural steel is prepared by adding trace alloying elements to low-alloy steel. These alloying elements may include chromium, molybdenum, titanium, tungsten, vanadium, etc., which help refine the grains and improve the mechanical properties of the steel.
The delivery status of fine grain structural steels may vary depending on manufacturer and customer needs. Usually, this steel may be delivered in hot rolling, controlled rolling, normalizing, normalizing rolling, etc., and the delivery state can also be specified according to technical requirements.
The mechanical properties of fine grain structural steel include tensile strength, yield strength, elongation and so on. The specific mechanical properties will vary according to the type of steel and the manufacturing process. For example, S355NL is a kind of normalizing rolling that can weld fine grain structure steel plates with tensile strength ranging from Rm630-450MPa, yield strength between 355-275MPa, and elongation after fracture of about 21-22%.
Fine-grain structural steels have a wide range of applications in the engineering field, including but not limited to:
Bridges and buildings: Used to manufacture bridge structures and building structures that require high strength and toughness.
Ships: Used to manufacture the skeleton, deck and other components of ships.
Automobile manufacturing: used to manufacture automobile body, chassis and other components to improve the strength and safety of automobiles.
Petrochemical: Used to manufacture pipes, containers and other components in petrochemical equipment.
Nuclear and thermal power: Used to manufacture key components in nuclear and thermal power equipment, such as turbine cylinders.
Address: Zhengzhou city in China.
Phone: 0086-371-86151827
Email: 
