A325 is a representative popular product our company produces routinely. It is one kind of high strength structural bolts complying with ASTM standard. Different from normal standard hex bolts, A325 bolt is designed for steel-to-steel structural connections, for example, shear connection, axial tensile connection and carrying connection. Usually the head on it would be larger. And it could survive successfully in more intense and harsh conditions. Treated for strength, A325 bolts should go through rigorous testing to ensure properties are at their peak. This includes tensile strength, yield KSI and more indicates.
The level of performance includes type 1 and type 3. Type 1 is a heat treated high strength plain carbon, carbon-boron, alloy steel or alloy boron steel bolting materials with minimum tensile requirement of 105 ksi, yield 81 ksi and maximum hardness limit of 25 - 35 HRC. Type 3 is heat treated weathering steel bolting material with similar strength requirement to type 1 but