ASTM International Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength ASTM A325-07a

This specification covers the chemical, mechanical, and dimensional requirements for two types of heavy hex structural bolts made of quenched and tempered steel that are intended for use in structural connections. These bolts are designated by type, denoting chemical composition, as follows: Type 1-medium carbon, carbon boron, or medium carbon alloy steel; and Type 3-weathering steel. The steel bolts shall undergo heat and product analysis for chemical composition measurements. The bolts shall also undergo test that shall examine their conformance to specified properties such as dimensions and thread fit, surface discontinuities, coating weight and thickness, hardness, tensile strength, yield strength, elongation, reduction of area, proof load, and rotational capacity.