The ASTM A572 Grade 50 specification is a standard specification for high-strength, low-alloy structural steel shapes, plates, and bars. It covers five grades under this specification: Grade 42, Grade 50, Grade 55, Grade 60, and Grade 65. The grades denote the minimum yield strength of the steel in ksi (kilo-pounds per square inch). For ASTM A572 Grade 50, the minimum yield strength is 50 ksi.
The specification sets requirements for chemical composition, mechanical properties, and dimensional tolerances. The chemical composition typically includes elements such as carbon, manganese, phosphorus, sulfur, silicon, and small amounts of copper, chromium, nickel, and molybdenum. The mechanical properties include minimum yield strength, tensile strength, and elongation. Dimensional tolerances are specified for various product forms, such as plates, bars, and shapes.
ASTM A572 Grade 50 steel is widely used in construction and structural applications due to its excellent strength-to-weight ratio and enhanced weldability.
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