The chemical composition of A761/A761M-17 steel grade consists of carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), and copper (Cu). The composition is as follows:
– Carbon (C): 0.30% maximum
– Manganese (Mn): 0.60-1.10%
– Phosphorus (P): 0.035% maximum
– Sulfur (S): 0.040% maximum
– Silicon (Si): 0.10-0.35%
– Copper (Cu): 0.20% minimum
This composition ensures that the steel grade has the necessary strength, ductility, and corrosion resistance for structural applications.
The mechanical properties of A761/A761M-17 steel grade meet the requirements specified in the standard. The properties include:
– Tensile strength: The steel grade has a minimum tensile strength of 58,000 psi (400 MPa).
– Yield strength: The minimum yield strength of the steel grade is 36,000 psi (250 MPa).
– Elongation: The steel grade has a minimum elongation of 23% in a 2-inch (50 mm) gauge length.
– Charpy V-notch impact test: The steel grade has a minimum average impact energy of 20 ft-lbf (27 J) at 70°F (20°C).
These properties ensure that the steel grade can withstand the applied loads and provide sufficient safety margins.
A761/A761M-17 is the standard number assigned to this specific steel grade. The standard provides the specifications and requirements for the manufacturing and testing of the steel grade. It includes details about the chemical composition, mechanical properties, heat treatment, dimensional tolerances, and testing methods.
The A761/A761M-17 steel grade is considered the future of structural steel due to its high strength, excellent corrosion resistance, and superior performance under various loading conditions. It is suitable for a wide range of applications, including building construction, bridges, infrastructure, and industrial structures.
The introduction of A761/A761M-17 steel grade represents a significant advancement in the field of structural steel. It offers improved performance and reliability compared to conventional steel grades. With its exceptional properties, this steel grade has the potential to revolutionize the way structures are designed and built, providing safer and more sustainable solutions for the future.