A325-10e1 Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

Active Standard|Developed by Subcommittee: F16.02|Book of Standards Volume: 01.08

Historical (view previous versions of standard)

1. Scope:

1.1 This specification2 covers two types of quenched and tempered steel heavy hex structural bolts having a minimum tensile strength of 120 ksi for sizes 1.0 in. and less and 105 ksi for sizes over 1.0 to 11/2 in., inclusive.

1.2 The bolts are intended for use in structural connections. These connections are comparable to those covered under the requirements of the Specification for Structural Joints Using High-Strength Bolts, approved by the Research Council on Structural Connections; endorsed by the American Institute of Steel Construction and by the Industrial Fastener Institute.

1.3 The bolts are furnished in sizes 1/2 to 11/2 in., inclusive. They are designated by type, denoting chemical composition as follows:



Type 1

Medium carbon, carbon boron, or medium carbon alloy steel.

Type 2

Withdrawn in November 1991.

Type 3

Weathering steel.

Note 1Bolts for general applications, including anchor bolts, are covered by Specification A449. Also refer to Specification A449 for quenched and tempered steel bolts and studs with diameters greater than 11/2 in. but with similar mechanical properties.

1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

Note 2A complete metric companion to Specification A325 has been developed, Specification A325M; therefore, no metric equivalents are presented in this specification.

1.5 This specification is applicable to heavy hex structural bolts only. For bolts of other configurations and thread lengths with similar mechanical properties, see Specification A449.

1.6 Terms used in this specification are defined in Terminology F1789.

1.7  The following safety hazard caveat pertains only to the test methods portion, Section 10, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

A194/A194M Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

A325M Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength (Metric)

A449 Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

A490 Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

A563 Standard Specification for Carbon and Alloy Steel Nuts

A751 Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

B695 Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

D3951 Standard Practice for Commercial Packaging

F436 Standard Specification for Hardened Steel Washers

F606 Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets

F959 Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners

F1470 Standard Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection

F1789 Standard Terminology for F16 Mechanical Fasteners

F2329 Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners

G101 Standard Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels