Global InformationASTM A325 information
ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1⁄2 to 1+1⁄2 inches (13 to 38 mm) in diameter.[1]
The equivalent metric standard is ASTM A325M, which is titled Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength. It defines mechanical properties for sizes M12–36.[2]
This is a standard set by the standards organization ASTM International, a voluntary standards development organizations that sets technical standards for materials, products, systems, and services.
In 2016, ASTM officially withdrew specification A325 and replaced it with ASTM F3125.[3] To minimize confusion, bolt head markings are unchanged and the designation A325 is retained as a grade name within the new standard.[4] In 1951, A325 bolts were recognized as equivalent to a hot driven ASTM A141 rivet.[5]
- ^ ASTM A325 - 09, retrieved 2009-06-13.
- ^ ASTM A325M - 09, retrieved 2009-06-13.
- ^ "A325 Structural Bolts". Portland Bolt. Retrieved 2019-01-18.
- ^ Shaw, Robert E. Jr. (Nov 2015). "New Twists and Turns". STRUCTURE Magazine.
- ^ Research Council on Structural Connections (Jan 1951), Specifications for Assembly of Structural Joints Using High Tensile Steel Bolts, American Institute of Steel Construction