ASTM A108-24
(Specification)Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
ABSTRACT
This specification covers cold-finished carbon and alloy steel bars for heat treatment, machining into components, or for as-finished condition as shafting or in constructional applications. The steel materials shall be cold drawn, turned, ground, polished, hot wrought, cold rolled, and heat treated. The steel specimens shall undergo chemical analysis.
SCOPE
1.1 This specification covers cold-finished carbon and alloy steel bars produced in straight length and coil. Cold-finished bars are suitable for heat treatment, for machining into components, or for use in the as-finished condition as shafting, or in constructional applications, or for other similar purposes (Note 1). Grades of steel are identified by grade numbers or by chemical composition.
Note 1: A guide for the selection of steel bars is contained in Practice A400.
1.2 Some end uses may require one or more of the available designations shown under Supplementary Requirements. Supplementary requirements shall apply only when specified individually by the purchaser.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
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Standards Content (Sample)
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.
Designation: A108 − 24
Standard Specification for
1
Steel Bar, Carbon and Alloy, Cold-Finished
This standard is issued under the fixed designation A108; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
1.1 This specification covers cold-finished carbon and alloy
A400 Practice for Steel Bars, Selection Guide, Composition,
steel bars produced in straight length and coil. Cold-finished
and Mechanical Properties
bars are suitable for heat treatment, for machining into
A510/A510M Specification for General Requirements for
components, or for use in the as-finished condition as shafting,
Wire Rods and Coarse Round Wire, Carbon Steel, and
or in constructional applications, or for other similar purposes
Alloy Steel
(Note 1). Grades of steel are identified by grade numbers or by
A576 Specification for Steel Bars, Carbon, Hot-Wrought,
chemical composition.
Special Quality
NOTE 1—A guide for the selection of steel bars is contained in Practice
A400.
2.2 Other Documents:
SAE Handbook and SAE J1086 Recommended Practice for
1.2 Some end uses may require one or more of the available
3
Numbering Metals and Alloys (UNS)
designations shown under Supplementary Requirements.
4
AIST Bar Steels: Steel Product Manual
Supplementary requirements shall apply only when specified
individually by the purchaser.
3. Terminology
1.3 The values stated in inch-pound units are to be regarded
3.1 Definitions:
as standard. The values given in parentheses are mathematical
3.1.1 product tolerance levels, n—cold-finished steel bar is
conversions to SI units that are provided for information only
produced with up to three (3) increasingly tight tolerance
and are not considered standard.
levels, for the individual product characteristics, dependent on
1.4 This international standard was developed in accor-
the method of manufacture necessary to meet purchaser-
dance with internationally recognized principles on standard-
ordered specification requirements (Product Tolerance Level 1
ization established in the Decision on Principles for the
is selected, unless otherwise specified by the purchaser).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Ordering Information
Barriers to Trade (TBT) Committee.
4.1 Orders for cold-finished steel bar to this specification
should include the following items to adequately describe the
2. Referenced Documents
material:
2
2.1 ASTM Standards:
4.1.1 Name of material (see 6.1) and the cold finish manu-
A29/A29M Specification for General Requirements for Steel
facturing methods (see 6.2),
Bars, Carbon and Alloy, Hot-Wrought
4.1.2 ASTM specification number and date of issue,
A304 Specification for Carbon and Alloy Steel Bars Subject
4.1.3 Chemical composition, or steel grade designation or
to End-Quench Hardenability Requirements
limits as defined in Specification A29/A29M,
A322 Specification for Steel Bars, Alloy, Standard Grades
4.1.4 Silicon level, if required,
4.1.5 Additional machinability-enhancing elements (see
Footnote F to Table 1 of Specification A29/A29M),
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee 4.1.6 Cold finish steel bar surface conditions (surface toler-
A01.15 on Bars.
ances listed in Table A1.7, Table A1.8, and Table A1.9),
Current edition approved March 1, 2024. Published March 2024. Originally
approved in 1926. Last previous edition approved in 2018 as A108 – 18. DOI:
10.1520/A0108-24.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM PA 15096, http://www.sae.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from Association for Iron & Steel Technology (AIST), 180 Thorn
the ASTM website. Hill Road, Warrendale, PA 15086–7528, http://www.aist.org
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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A108 − 24
4.1.7 Tolerance levels (reference tolerances listed in Table 6.3.
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A108 − 18 A108 − 24
Standard Specification for
1
Steel Bar, Carbon and Alloy, Cold-Finished
This standard is issued under the fixed designation A108; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*Scope
1.1 This specification covers cold-finished carbon and alloy steel bars produced in straight length and coil. Cold-finished bars are
suitable for heat treatment, for machining into components, or for use in the as-finished condition as shafting, or in constructional
applications, or for other similar purposes (Note 1). Grades of steel are identified by grade numbers or by chemical composition.
NOTE 1—A guide for the selection of steel bars is contained in Practice A400.
1.2 Some end uses may require one or more of the available designations shown under Supplementary Requirements.
Supplementary requirements shall apply only when specified individually by the purchaser.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A29/A29M Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
A304 Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
A322 Specification for Steel Bars, Alloy, Standard Grades
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A400 Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and Alloy Steel
A576 Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality
2.2 Other Documents:
3
SAE Handbook and SAE J1086 Recommended Practice for Numbering Metals and Alloys (UNS)
4
AIST Bar Steels: Steel Product Manual
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.15
on Bars.
Current edition approved Nov. 1, 2018March 1, 2024. Published November 2018March 2024. Originally approved in 1926. Last previous edition approved in 20132018
as A108A108 – 18.–13. DOI: 10.1520/A0108–18.10.1520/A0108-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096, http://www.sae.org.
4
Available from Association for Iron & Steel Technology (AIST), 180 Thorn Hill Road, Warrendale, PA 15086–7528, http://www.aist.org
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A108 − 24
3. Terminology
3.1 Definitions:
3.1.1 product tolerance levels—levels, n—cold-finished steel bar is produced with up to three (3) increasingly tight tolerance
levels, for the individual product characteristics, dependent on the method of manufacture necessary to meet purchaser-ordered
specification requirements.requirements (Product Tolerance Level 1 is selected, unless otherwise specified by the purchaser.)pur-
chaser).
4. Ordering Information
4.1 Orders for cold-finished steel bar to this specification should include the following items to adequately describe the material:
4.1.1 Name of material,material (see 6.1) and the cold finish manufacturing methods (see 6.2),
4.1.2 ASTM specification number and date of issue,
4.1.3 Chemical composition, or steel grade designation or limits as defined in Specification A29/A29M,
4.1.4 Silicon level, if require
...
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