ASTM A517 Grade S (abbreviated as A517 Gr.S) steel plate is a high-strength, high-toughness quenched and tempered alloy steel plate.
Characteristics
High Strength
Yield strength ≥690 MPa, tensile strength 795–930 MPa (for thickness ≤65 mm), classifying it as a high-strength steel plate.
Excellent mechanical properties are achieved through quenching and tempering (QT treatment), making it suitable for structural components subjected to high loads.
Good Low-Temperature Toughness
Maintains high impact toughness at low temperatures, making it suitable for cold regions or low-temperature operating conditions.
Excellent Weldability
With a rational chemical composition design, it is less prone to cracking during welding, making it ideal for welding large structural components.
Fatigue and Lamellar Tearing Resistance
By controlling impurity content (e.g., sulfur, phosphorus) and adding alloy elements (such as Cr, Mo), fatigue resistance and Z-directional (through-thickness) resistance to lamellar tearing are significantly improved.
Excellent Weldability
The chemical composition is optimally designed to minimize cracking during welding, making it ideal for welding large-scale structural components.
Fatigue and Lamellar Tearing Resistance
By controlling impurity content (e.g., S, P) and adding alloy elements (e.g., Cr, Mo), fatigue resistance and Z-direction (through-thickness) resistance to lamellar tearing are enhanced.
Good Machinability
The plate can be processed into complex shapes via cutting, bending, forming, and other processes to meet diverse engineering needs.
Applications
Pressure Vessels and Boiler Manufacturing
Used for high-pressure storage tanks, heat exchangers, and reactors, ensuring safety under high-temperature and high-pressure conditions.
Offshore Engineering
Suitable for structural components of offshore platforms, drilling rigs, and offshore wind turbine foundations, resisting seawater corrosion and harsh marine conditions.
Mining and Heavy Machinery
Used to manufacture hydraulic supports, mine truck bodies, crane booms, etc., capable of withstanding heavy loads and impacts.
Bridges and Construction
Suitable for core load-bearing structures in long-span bridges and high-rise buildings, providing high strength and seismic resistance.
Energy Equipment
Applied in nuclear power plant containments, hydropower station pressure pipelines, etc., ensuring equipment reliability under extreme conditions.
Applications
Pressure Vessel and Boiler Manufacturing
Fabricates high-pressure storage tanks, heat exchangers, reactors, and other equipment to meet safety requirements under high-temperature and high-pressure conditions.
Marine Engineering
Applied to structural components of offshore platforms, drilling platforms, and offshore wind turbine foundations, resisting seawater corrosion and harsh marine environments.
Mining and Heavy Machinery
Used in hydraulic supports, mining truck bodies, crane booms, etc., to withstand heavy loads and impacts.
Bridges and Architecture
Suitable for core load-bearing structures in long-span bridges and high-rise buildings, providing high strength and seismic resistance.
Energy Equipment
Used in nuclear power plant containments, hydropower station pressure pipelines, etc., ensuring equipment reliability under extreme conditions.
