The A958/A958M-17 steel grade is a high-strength low-alloy structural steel that is primarily used in the construction industry. It is known for its excellent mechanical properties, which make it suitable for a wide range of applications.
Mechanical Properties:
– Tensile Strength: The A958/A958M-17 steel grade has a minimum tensile strength of 450 MPa, indicating its strong resistance to external forces.
– Yield Strength: It has a minimum yield strength of 345 MPa, which means it can withstand substantial loads without permanent deformation.
– Elongation: The steel grade has a minimum elongation of 18%, indicating its ability to deform under tensile stress without fracturing.
– Impact Toughness: It has a minimum Charpy V-notch impact toughness value of 27 J (20 ft-lbf) at -20°C (-4°F), ensuring its durability in low-temperature environments.
Chemical Composition:
– Carbon (C): The maximum carbon content is 0.20%, which ensures good weldability and formability.
– Manganese (Mn): The steel grade contains a maximum manganese content of 1.50%, providing increased strength and hardenability.
– Phosphorus (P): The maximum phosphorus content is 0.04%, which ensures good weldability and reduces the risk of brittleness.
– Sulfur (S): The maximum sulfur content is 0.05%, ensuring good machinability and reducing the risk of hot cracking.
– Silicon (Si): The maximum silicon content is 0.50%, ensuring good weldability and reducing the risk of aging embrittlement.
– Copper (Cu): The maximum copper content is 0.60%, which improves atmospheric corrosion resistance.
Applications:
The A958/A958M-17 steel grade is commonly used in structural applications such as:
– Bridges: The high-strength properties of this steel grade make it suitable for constructing bridges, ensuring their structural integrity and durability.
– Buildings: It is also used in the construction of high-rise buildings and frameworks, providing strength and stability.
– Heavy machinery: The steel grade’s excellent mechanical properties make it suitable for manufacturing heavy-duty machinery and equipment.
– Transportation: It is used in the fabrication of vehicle structures, such as truck frames and trailers, providing strength and impact resistance.
Overall, the A958/A958M-17 steel grade offers high strength, good weldability, and excellent mechanical properties, making it a preferred choice for various structural applications in the construction and transportation industries.