The A656/A656M-13 steel grade is a high strength, low alloy structural steel that is commonly used in construction and engineering applications. It is known for its excellent strength and durability, making it suitable for a wide range of applications where high strength is required.
The chemical composition of the A656/A656M-13 steel grade is as follows:
– Carbon (C): The carbon content in this steel grade is typically between 0.18-0.23%, which provides good strength and toughness.
– Manganese (Mn): The manganese content in this steel grade is typically between 1.65-1.85%, which helps improve the strength and hardenability of the steel.
– Phosphorus (P): The phosphorus content in this steel grade is limited to a maximum of 0.025%, as higher levels can adversely affect the steel’s toughness and ductility.
– Sulfur (S): The sulfur content in this steel grade is limited to a maximum of 0.030%, as higher levels can adversely affect the steel’s ductility and weldability.
– Silicon (Si): The silicon content in this steel grade is typically between 0.60-0.90%, which provides good strength and toughness.
– Copper (Cu): The copper content in this steel grade is typically between 0.20-0.40%, which improves the steel’s atmospheric corrosion resistance.
– Chromium (Cr): The chromium content in this steel grade is typically between 0.30-0.40%, which improves the steel’s hardenability.
The mechanical properties of the A656/A656M-13 steel grade are as follows:
– Tensile Strength: The minimum tensile strength of this steel grade is 550 MPa (80 ksi).
– Yield Strength: The minimum yield strength of this steel grade is 345 MPa (50 ksi).
– Elongation: The minimum elongation of this steel grade is 23% for thicknesses over 2 inches.
– Charpy V-Notch Impact Test: The Charpy V-notch impact test is conducted to measure the steel’s toughness at different temperatures. The minimum average impact energy for this steel grade is typically 27 J (20 ft-lbf) at -20°C (-4°F).
The A656/A656M-13 steel grade is standardized by ASTM International under the standard number A656/A656M-13. This standard specifies the requirements for hot-rolled structural steel plates, shapes, and bars with improved formability, weldability, and toughness. It provides guidelines for chemical composition, mechanical properties, heat treatment, and testing of the steel grade.
In summary, the A656/A656M-13 steel grade offers excellent strength and durability, making it suitable for various construction and engineering applications. Its chemical composition and mechanical properties meet the requirements specified by ASTM International under the standard A656/A656M-13.