ASTM F3125 / F3125M - 15a
Standard Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions
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1. Scope
1.1 This specification covers chemical, physical and mechanical requirements for quenched and tempered bolts manufactured from steel and alloy steel, in inch and metric dimensions, in two strength grades, two types and two styles.
1.1.1 This specification is a consolidation and replacement of six ASTM standards, including; A325, A325M, A490, A490M, F1852 and F2280.
1.1.2 This consolidated standard is to ensure alignment between standards with the same intended end use and to simplify the use and maintenance of structural bolt specifications.
1.2 Intended Use:
1.2.1 Bolts manufactured under this specification are intended for use in structural connections covered in the Specification for Structural Joints Using High-Strength Bolts, as approved by the Research Council on Structural Connections.
1.2.2 Bolts in this specification are furnished in sizes from 1/2 to 1-1/2 in. inclusive and from M12 to M36 inclusive.
1.3 Classification:
1.3.1 Bolts are designated by grade or property class, which indicates inch or metric respectively.
1.3.2 Bolts are designated by type denoting raw material chemical composition.
1.3.3 Bolts are designated by style denoting Heavy Hex bolts or “Twist-Off” Style assemblies.
| Grade | Min. Strength | Type | Style | |
| A325 | 120 ksi | 1 | 3 | Heavy Hex Head |
| A325M | 830 MPa | 1 | 3 | Heavy Hex Head |
| F1852 | 120 ksi | 1 | 3 | Twist-Off |
| A490 | 150 ksi | 1 | 3 | Heavy Hex Head |
| A490M | 1040 MPa | 1 | 3 | Heavy Hex Head |
| F2280 | 150 ksi | 1 | 3 | Twist-Off |
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| Type 1 - 120 ksi (830 MPa) - carbon steel, carbon boron steel, alloy steel or alloy steel with boron addition | ||||
| Type 3 - 120 ksi (830 MPa) or 150 ksi (1040 MPa) - weathering steel | ||||
| Type 1 - 150 ksi (1040 MPa) - alloy steel or alloy steel with boron addition | ||||
1.4 Terms used in this specification are defined in F1789.
1.5 Units—The values stated in either SI units or inch pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.6 Table footnotes are requirements. Notes are advisory.
1.7 The following safety hazard caveat pertains to the test methods portion 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
A194/A194M Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
A354 Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners
A449 Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use
A563 Specification for Carbon and Alloy Steel Nuts
A563M Specification for Carbon and Alloy Steel Nuts (Metric)
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
E709 Guide for Magnetic Particle Testing
E1444/E1444M Practice for Magnetic Particle Testing
F436 Specification for Hardened Steel Washers
F436M Specification for Hardened Steel Washers (Metric)
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F788 Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
F1136/F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
F1789 Terminology for F16 Mechanical Fasteners
F1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
F2328 Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts
F2328M Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts (Metric)
F2329 Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
F2660 Test Method for Qualifying Coatings for Use on A490 Structural Bolts Relative to Environmental Hydrogen Embrittlement
F2833 Specification for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/Inorganic Type
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
ASME Standards
B1.13M B18.18 Quality Assurance for Fasteners B18.2.6 Fasteners for Use in Structural ApplicationsIFI Standard
IFI 144 Test Evaluation Procedures for Coating QualificationRCSC Standard
Specification for Structural Joints Using High-Strength BoltsICS Code
ICS Number Code 21.060.10 (Bolts, screws, studs)
UNSPSC Code
UNSPSC Code 31161600(Bolts); 11101704(Steel)
Referencing This Standard
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DOI: 10.1520/F3125_F3125M-15A
Citation Format
ASTM F3125 / F3125M-15a, Standard Specification for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi (1040 MPa) Minimum Tensile Strength, Inch and Metric Dimensions, ASTM International, West Conshohocken, PA, 2015, www.astm.org
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