ASTM A618/A618M-04(2015)

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 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 (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.  
Note 1: For methods of estimating the atmospheric corrosion resistance of low alloy steels see Guide G101 or actual data.  
1.3 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-conformance with the standard.

General Information

• Status: Historical
• Publication Date: 31-Aug-2015
• 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)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A618/A618M −04 (Reapproved 2015)
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 for Steel Products for Shipment
A751 Test Methods, Practices, and Terminology for Chemi-
1.1 This specification covers grades of hot-formed welded
cal Analysis of Steel Products
and seamless high-strength low-alloy square, rectangular,
G101 Guide for Estimating the Atmospheric Corrosion Re-
round, or special shape structural tubing for welded, riveted, or
sistance of Low-Alloy Steels
bolted construction of bridges and buildings and for general
structural purposes. When the steel is used in welded
3. Ordering Information
construction, the welding procedure shall be suitable for the
steel and the intended service.
3.1 Orders for material under this specification should
include the following as required to describe the material
1.2 Grade II has atmospheric corrosion resistance equiva-
adequately:
lent to that of carbon steel with copper (0.20 minimum Cu)
3.1.1 Quantity (feet, metres, or number of lengths),
Grades Ia and Ib have atmospheric corrosion resistance sub-
3.1.2 Grade (Table 1 and Table 2),
stantially better than that of Grade II (Note 1). When properly
3.1.3 Material (round, square, or rectangular tubing),
exposed to the atmosphere, Grades Ia and Ib can be used bare
3.1.4 Method of manufacture (seamless, buttwelded, or
(unpainted) for many applications. When enhanced corrosion
hot-stretch-reduced electric-resistance welded),
resistance is desired, Grade III, copper limits may be specified.
3.1.5 Size (outside diameter and nominal wall thickness for
NOTE 1—For methods of estimating the atmospheric corrosion resis-
round tubing and the outside dimensions and calculated nomi-
tance of low alloy steels see Guide G101 or actual data.
nal wall thickness for square and rectangular tubing),
1.3 The values stated in either SI units or inch-pound units
3.1.6 Length (specific or random, see 8.2),
are to be regarded separately as standard. Within the text, the
3.1.7 End condition (see 9.2),
SI units are shown in brackets. The values stated in each
3.1.8 Burr removal (see 9.2),
system may not be exact equivalents; therefore, each system
3.1.9 Certification (see 12.1),
shall be used independently of the other. Combining values
3.1.10 Specification designation (A618 or A618M, includ-
from the two systems may result in non-conformance with the
ing yeardate),
standard.
3.1.11 End use, and
3.1.12 Special requirements.
2. Referenced Documents
2
2.1 ASTM Standards: 4. Process
A370 Test Methods and Definitions for Mechanical Testing
4.1 The steel shall be made by one or more of the following
of Steel Products
processes: open-hearth, basic-oxygen, or electric-furnace.
A700 Guide for Packaging, Marking, and Loading Methods
4.2 Steel may be cast in ingots or may be strand cast. When
steels of different grades are sequentially strand cast, identifi-
cation of the resultant transition material is required. The
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
producer shall remove the transition material by any estab-
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.09 on Carbon Steel Tubular Products.
lished procedure that positively separates the grades.
Current edition approved Sept. 1, 2015. Published September 2015. Originally
approved in 1968. Last previous edition approved in 2010 as A618/A618M–04
5. Manufacture
(2010). DOI: 10.1520/A0618_A0618M-04R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 The tubing shall be made by the seamless, furnace-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
buttwelded (continuous-welded), or hot-stretch-reduced
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. electric-resistance-welded process.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A618/A618M−04 (2015)
TABLE 1 Chemical Requirements
Composition, %
Element Grade Ia Grade Ib Grade II Grade III
Heat Product Heat Product Heat Product Heat Product
A A
Carbon, max 0.15 0.18 0.20 . . . 0.22 0.26 0.23 0.27
A A
Manganese 1.00 max 1.04 max 1.35 max 1.40 max 0.85–1.25 1.30 max 1.35 max 1.40
...

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 2010) A618/A618M − 04 (Reapproved 2015)
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
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 (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.
NOTE 1—For methods of estimating the atmospheric corrosion resistance of low alloy steels see Guide G101 or actual data.
1.3 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-conformance with the standard.
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, Practices, and Terminology for Chemical Analysis of Steel Products
G101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels
3. Ordering Information
3.1 Orders for material under this specification should include the following as required to describe the material adequately:
3.1.1 Quantity (feet, metres, or number of lengths),
3.1.2 Grade (Table 1 and Table 2),
3.1.3 Material (round, square, or rectangular tubing),
3.1.4 Method of manufacture (seamless, buttwelded, or hot-stretch-reduced electric-resistance welded),
3.1.5 Size (outside diameter and nominal wall thickness for round tubing and the outside dimensions and calculated nominal
wall thickness for square and rectangular tubing),
3.1.6 Length (specific or random, see 8.2),
3.1.7 End condition (see 9.2),
3.1.8 Burr removal (see 9.2),
3.1.9 Certification (see 12.1),
3.1.10 Specification designation (A618 or A618M, including yeardate),
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 April 1, 2010Sept. 1, 2015. Published August 2010September 2015. Originally approved in 1968. Last previous edition approved in 20042010
as A618/A618M–04. –04 (2010). DOI: 10.1520/A0618_A0618M-04R10.10.1520/A0618_A0618M-04R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A618/A618M − 04 (2015)
TABLE 1 Chemical Requirements
Composition, %
Element Grade Ia Grade Ib Grade II Grade III
Heat Product Heat Product Heat Product Heat Product
A A
Carbon, max 0.15 0.18 0.20 . . . 0.22 0.26 0.23 0.27
A A
Manganese 1.00 max 1.04 max 1.35 max 1.40 max 0.85–1.25 1.30 max 1.35 max 1.40 max
Phosphorus, max 0.15 0.16 0.025 0.035 0.025 0.035 0.025 0.035
Sulfur, max 0.025 0.045 0.025 0.035 0.025 0.035 0.025 0.035
Silicon, max . . . . . . . . . . . . 0.30 0.33 0.30 0.35
B B
Copper, min 0.20 0.18 0.20 0.18 0.20 0.18 . . . . . .
C
Vanadium, min . . . . . . . . . .
...