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ASTM
A307-21 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
Edition: 2021
$78.62
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Description of ASTM-A307 2021
ASTM A307-21
Active Standard: Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength
ASTM A307
Scope
1.1 This specification covers the chemical and mechanical requirements of two
grades of carbon steel bolts and studs in sizes 1/4 in. through 4 in. The fasteners are designated by “Grade” denoting tensile strength and intended use, as follows:
Grade
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Description
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|
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Grade A
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Bolts, studs, and threaded rod having a minimum tensile strength of 60 ksi and intended for general applications,
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Grade B
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Bolts, studs, and threaded rodA having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges, and
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Grade C
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Replaced by Specification F1554 Gr.36
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1.2 This specification does not cover requirements for machine screws, thread cutting/forming screws, mechanical expansion anchors or similar externally
threaded fasteners.
1.3 Suitable nuts are covered in Specification A563. Unless otherwise specified, the grade and style of nut for each
grade of fastener, of all surface finishes, shall be as follows:
Fastener Grade and Size
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Nut Grade and StyleA
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A 1/4 to 11/2 in.
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A, hex
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A over 11/2 to 4 in.
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A, heavy hex
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B, 1/4 to 4 in.
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A, heavy hex
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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.
1.5 Supplementary Requirement S1 of an optional nature is provided, which describes additional restrictions to be applied when bolts are to be welded. It
shall apply only when specified in the inquiry, order, and contract.
1.6 Terms used in this specification are defined in Terminology F1789 unless otherwise defined herein.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on
Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Keywords
all thread rod; bolts; carbon steel; steel; studs; threaded rod;
ICS Code
ICS Number Code 21.060.10 (Bolts, screws, studs)
DOI: 10.1520/A0307-21
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