ASTM A283 Grade D steel (abbreviated as A283Gr.D) is a low-alloy structural steel with high strength and high toughness. A283Gr.D boasts superior mechanical properties, with a tensile strength ranging from 415 to 550 MPa, a yield strength generally above 300 MPa, a yield point (σs/MPa) not less than 230, an elongation after fracture (δ5/%) not less than 20%, an elongation rate of 15% to 20%, and an impact toughness at room temperature greater than 600 kJ/m to 800 kJ/m. For large welded components, high fracture toughness is also required.
Due to its high strength, high toughness, and excellent welding and cold forming properties, A283Gr.D steel plates are widely used in the manufacture of various heavy-load structures, specifically including:
Bridges: The high strength and toughness of A283Gr.D make it an ideal material for bridge construction, capable of bearing large loads and impacts.
Ships: In shipbuilding, A283Gr.D steel plates are used to manufacture hull structures, ensuring the safety and stability of ships during navigation.
Vehicles: A283Gr.D steel plates are also used to manufacture structural components of various vehicles, such as automobile bodies and train carriages.
Boilers and high-pressure vessels: Due to their good mechanical properties and welding performance, A283Gr.D steel plates are widely used in the manufacture of boilers and high-pressure vessels.
Oil and gas pipelines: A283Gr.D steel plates are also widely used in the field of oil and gas pipelines, capable of bearing loads in high-pressure and high-temperature environments.
Large steel structures: A283Gr.D steel plates are also used to manufacture various large steel structures, such as building steel structures and bridge support structures.
In summary, ASTM A283 Grade D steel, with its high strength, high toughness, and excellent welding and cold forming properties, has broad application prospects in the fields of bridges, ships, vehicles, boilers, high-pressure vessels, oil and gas pipelines, and large steel structures.
