Technical specifications and applications of ASTM/ASME A/SA 490 standard bolts
The ASTM/ASME A/SA 490 specification governs the production of high-strength structural bolts with hexagonal heads, manufactured from alloy steels through quenching and tempering. Products of this class possess a tensile strength ranging from 150 to 173 ksi (kilopounds per square inch) and are designed for use in critical load-bearing steel structures.
The use of these fasteners is regulated by the requirements for structural connections established by the Research Council on Structural Connections (RCSC). The products comply with the standards of the American Institute of Steel Construction (AISC) and the Industrial Fasteners Institute (IFI). EV Group China supplies high-strength fasteners, ensuring the chemical composition and mechanical properties meet strict industry protocols.
The diameter range of the supplied products is from 1.0 to 2.0 inches inclusive. The bolts are classified by the type of steel chemical composition, which determines their suitability for specific climatic and load conditions.
In the absence of specific instructions in an order, EV Group China supplies heavy hex structural bolts that meet the requirements of the A490 standard. The terminology used in the classification and description of the products fully complies with the F1789 standard.
For projects requiring the metric system of measurement, the A490M specification (strength classes 10.9 and 10.9.3) should be used. Please note that this standard is based on the inch-pound unit system. During testing and installation, it is necessary to strictly follow the safety protocols specified in Section 12 of this standard, considering the user’s responsibility for assessing potential risks and complying with regulatory restrictions.