The A820/A820M-16 steel grade is a standard specification for steel bars, carbon and alloy, cold-finished. This guide provides a comprehensive understanding of the composition, mechanical properties, and corresponding standards of the A820/A820M-16 steel grade.
Chemical Composition:
The chemical composition of the A820/A820M-16 steel grade is as follows:
– Carbon (C): The carbon content in the steel grade ranges from 0.15% to 0.35%.
– Manganese (Mn): The manganese content in the steel grade ranges from 0.60% to 0.90%.
– Phosphorus (P): The maximum phosphorus content in the steel grade is 0.035%.
– Sulfur (S): The maximum sulfur content in the steel grade is 0.040%.
Mechanical Properties:
The mechanical properties of the A820/A820M-16 steel grade include:
– Tensile Strength: The minimum tensile strength of the steel grade is 70,000 psi (480 MPa).
– Yield Strength: The minimum yield strength of the steel grade is 50,000 psi (345 MPa).
– Elongation: The minimum elongation of the steel grade is 14% in 2 inches or 12% in 4D.
These mechanical properties are tested using standard tensile and elongation tests.
Standard Number:
The A820/A820M-16 steel grade corresponds to the ASTM A820/A820M-16 standard. This standard provides the requirements for steel bars, carbon and alloy, cold-finished, that are used for general structural purposes.
Corresponding Standards:
The A820/A820M-16 steel grade corresponds to various international standards, including:
– ISO 683-17: Heat-treated steels, alloy steels, and free-cutting steels – Part 17: Ball and roller bearing steels.
– JIS G4805: High carbon chromium bearing steels.
– EN ISO 683-17: Heat-treated steels, alloy steels, and free-cutting steels – Part 17: Ball and roller bearing steels.
These corresponding standards ensure that the A820/A820M-16 steel grade can be used internationally and meet the specific requirements of different industries.
In conclusion, the A820/A820M-16 steel grade is a carbon and alloy steel bar that is cold-finished and used for general structural purposes. Understanding its chemical composition, mechanical properties, standard number, and corresponding standards is essential for ensuring its proper application and quality control.