ASTM A618/A618M-21

Standard Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing

ABSTRACT
This specification covers grades of hot-formed welded and seamless high-strength low-alloy square, rectangular, round, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings and for general structural purposes. These grades are: Grade Ia and Ib; Grade II; and Grade III. When the steel is used in welded construction, the welding procedure shall be suitable for the steel and the intended service. The tubing shall be made by the seamless, furnace-buttwelded (continuous-welded), or hot-stretch-reduced electric-resistance-welded process. Tensile test and bend test shall be performed for the material to conform to the requirements specified. If the results of the mechanical tests representing any heat do not conform to a requirement, retests shall be made.
SCOPE
1.1 This specification covers grades of hot-formed welded and seamless high-strength low-alloy square, rectangular, round, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings and for general structural purposes. When the steel is used in welded construction, the welding procedure shall be suitable for the steel and the intended service.  
1.2 Square and rectangular tubing is produced with flats of 1 in. to 16 in. [25 mm to 405 mm] and a specified wall thickness of 0.095 in. to 1.0 in. [2.5 mm to 25 mm]. Round tubing is produced with diameters of 1 in. to 48 in. [25 mm to 1220 mm] and a specified wall thickness of 0.095 in. to 2.50 in. [2.5 mm to 65 mm].  
1.3 This specification covers the following grades: Ia, Ib, II, III, IV, V, VI and VII.  
1.4 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements.  
1.5 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 nonconformance with the standard.  
1.6 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.

General Information

• Status: Published
• Publication Date: 31-Jul-2021
• ICS: 23.040.10 - Iron and steel pipes
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

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:A618/A618M −21
Standard Specification for
Hot-Formed Welded and Seamless High-Strength Low-Alloy
1
Structural Tubing
This standard is issued under the fixed designationA618/A618M; 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* Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification covers grades of hot-formed welded
Barriers to Trade (TBT) Committee.
and seamless high-strength low-alloy square, rectangular,
round, or special shape structural tubing for welded, riveted, or
2. Referenced Documents
bolted construction of bridges and buildings and for general
2
2.1 ASTM Standards:
structural purposes. When the steel is used in welded
A370 Test Methods and Definitions for Mechanical Testing
construction, the welding procedure shall be suitable for the
of Steel Products
steel and the intended service.
A700 Guide for Packaging, Marking, and Loading Methods
1.2 Square and rectangular tubing is produced with flats of
for Steel Products for Shipment
1 in. to 16 in. [25 mm to 405 mm] and a specified wall
A751 Test Methods and Practices for Chemical Analysis of
thickness of 0.095 in. to 1.0 in. [2.5 mm to 25 mm]. Round
Steel Products
tubing is produced with diameters of 1 in. to 48 in. [25 mm to
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
1220mm]andaspecifiedwallthicknessof0.095in.to2.50in.
Alloys, and Ferroalloys
[2.5 mm to 65 mm].
G101 Guide for Estimating the Atmospheric Corrosion Re-
1.3 This specification covers the following grades: Ia, Ib, II, sistance of Low-Alloy Steels
3
III, IV, V, VI and VII.
2.2 Federal Standard:
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
1.4 The text of this specification contains notes and foot-
3
2.3 Military Standard:
notes that provide explanatory material. Such notes and
MIL-STD-129 Marking for Shipment and Storage
footnotes, excluding those in tables and figures, do not contain
any mandatory requirements.
3. Terminology
1.5 This specification is expressed in both inch-pound units
3.1 Definitions—For definitions of terms used in this
and in SI units; however, unless the purchase order specifies
specification, refer to Terminology A941.
the applicable M specification designation (SI units), the
inch-pound units shall apply. The values stated in either SI
4. Ordering Information
units or inch-pound units are to be regarded separately as
4.1 Orders for material under this specification should
standard. Within the text, the SI units are shown in brackets.
include the following as required to describe the material
The values stated in each system may not be exact equivalents;
adequately:
therefore,eachsystemshallbeusedindependentlyoftheother.
4.1.1 Quantity (weight in metric tons, feet [meters], or
Combining values from the two systems may result in noncon-
number of lengths),
formance with the standard.
4.1.2 Name of the material (hot-formed tubing),
1.6 This international standard was developed in accor-
4.1.3 Method of manufacture (seamless or welded),
dance with internationally recognized principles on standard-
4.1.4 Grade (Ia, Ib, II, III, IV, V, VI or VII),
ization established in the Decision on Principles for the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
A01.09 on Carbon Steel Tubular Products. the ASTM website.
3
Current edition approved Aug. 1, 2021. Published September 2021. Originally Available from U.S. Government Printing Office, Superintendent of
approved in 1968. Last previous edition approved in 2015 as A618/A618M – 04 Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
(2015). DOI: 10.1520/A0618_A0618M-21. www.access.gpo.gov.
*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

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A618/A618M−21
4.1.5 Size (outside diameter and nominal wall thickness for 6.3 The weld
...

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: A618/A618M − 04 (Reapproved 2015) A618/A618M − 21
Standard Specification for
Hot-Formed Welded and Seamless High-Strength Low-Alloy
1
Structural Tubing
This standard is issued under the fixed designation A618/A618M; 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 grades of hot-formed welded and seamless high-strength low-alloy square, rectangular, round, or
special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings and for general structural
purposes. When the steel is used in welded construction, the welding procedure shall be suitable for the steel and the intended
service.
1.2 Grade II has atmospheric corrosion resistance equivalent to that of carbon steel with copper (0.20 minimum Cu) Grades Ia and
Ib have atmospheric corrosion resistance substantially better than that of Grade II (Square and rectangular tubing is produced with
flats of 1 in. Note 1). When properly exposed to the atmosphere, Grades Ia and Ib can be used bare (unpainted) for many
applications. When enhanced corrosion resistance is desired, Grade III, copper limits may be specified.to 16 in. [25 mm to 405
mm] and a specified wall thickness of 0.095 in. to 1.0 in. [2.5 mm to 25 mm]. Round tubing is produced with diameters of 1 in.
to 48
NOTE 1—For methods of estimating the atmospheric corrosion resistance of low alloy steels see Guide G101 or actual data.in. [25 mm to 1220 mm]
and a specified wall thickness of 0.095 in. to 2.50 in. [2.5 mm to 65 mm].
1.3 This specification covers the following grades: Ia, Ib, II, III, IV, V, VI and VII.
1.4 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes,
excluding those in tables and figures, do not contain any mandatory requirements.
1.5 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order specifies the
applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either SI units or
inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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-conformancenonconformance with the standard.
1.6 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.
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 A01.09
on Carbon Steel Tubular Products.
Current edition approved Sept. 1, 2015Aug. 1, 2021. Published September 2015September 2021. Originally approved in 1968. Last previous edition approved in 20102015
as A618/A618MA618/A618M – 04 (2015).–04 (2010). DOI: 10.1520/A0618_A0618M-04R15.10.1520/A0618_A0618M-21.
*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

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A618/A618M − 21
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A751 Test Methods and Practices for Chemical Analysis of Steel Products
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
3
2.2 Federal Standard:
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
3
2.3 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, refer to Terminology A941.
4. Ordering Information
4.1 Orders for
...