ASTM B491/B491M-15
(Specification)Standard Specification for Aluminum and Aluminum-Alloy Extruded Round Tubes for General-Purpose Applications
Standard Specification for Aluminum and Aluminum-Alloy Extruded Round Tubes for General-Purpose Applications
ABSTRACT
This specification covers aluminum and aluminum-alloy extruded round tubes either in coils or straight lengths, for general purpose applications such as refrigeration service, gas lines, oil lines, and instrument lines, in the alloys and tempers. Chemical composition: silicon, iron, copper, manganese, magnesium, chromium, zinc, vanadium, titanium, and aluminum. Tubes produced shall be cooled from an elevated temperature shaping process and naturally aged to a substantially stable condition. The specimen shall then undergo tests to check leakage and any evidence of leak shall be a cause for rejection. The ends of tubes in selected tempers shall be capable of being expanded by forcing a steel pin into the tube without signs of cracks, ruptures, or other defects clearly visible by normal vision. The tubes shall be supplied in the mill finish and shall be uniform as defined by the requirements of this specification and shall be commercially sound. Each tube shall be examined to determine conformance to this specification with respect to general quality and identification marking.
SCOPE
1.1 This specification covers aluminum and aluminum-alloy extruded round tubes either in coils or straight lengths, for general purpose applications such as refrigeration service, gas lines, oil lines, and instrument lines, in the alloys (Note 2) and tempers shown in Table 2 [Table 3], in outside diameters of 0.250 through 0.750 in. [6.00 through 20.00 mm]. For diameters over 0.500 through 0.750 in. [over 12.50 through 20.00 mm], the diameter and wall-thickness tolerances and eddy-current test parameters, if required, shall be agreed upon by the producer and the purchaser. Only tubes in aluminum 1200-H111 and 1235-H111 are sized after extrusion to minimize ovalness. (A) Limits are in percent maximum unless shown as a range or otherwise stated.(B) Analysis shall be made for the elements for which limits are shown in this table.(C) For purposes of determining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.(D) Others includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered nonconforming.(E) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.(F) The aluminum content shall be calculated by subtracting from 100.00 % the sum of all metallic elements present in amounts of 0.010 % or more each, rounded to the second decimal before determining the sum.(G) Vanadium 0.05%, maximum.(H) In case there of a discrepancy in the values listed in Table 1 with those listed in the “International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys” (known as the “Teal Sheets”), the composition limits registered with the Aluminum Association and published in the “Teal Sheets” should be considered the controlling composition. The “Teal Sheets” are available at http://www.aluminum.org/tealsheets. (A) The basis for establishment of mechanical property limits is shown in Annex A1.(B) To determine conformance to this specification, each value for tensile strength and for yield strength shall be rounded to the nearest 0.1 ksi and each value for elongation to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.(C) Tubes in this alloy are ...
General Information
Relations
Buy Standard
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: B491/B491M −15
Standard Specification for
Aluminum and Aluminum-Alloy Extruded Round Tubes for
1
General-Purpose Applications
This standard is issued under the fixed designation B491/B491M; 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.
1. Scope* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 Thisspecificationcoversaluminumandaluminum-alloy
mendations issued by the World Trade Organization Technical
extruded round tubes either in coils or straight lengths, for
Barriers to Trade (TBT) Committee.
general purpose applications such as refrigeration service, gas
lines, oil lines, and instrument lines, in the alloys (Note 2) and
2. Referenced Documents
tempers shown in Table 2 [Table 3], in outside diameters of
0.250 through 0.750 in. [6.00 through 20.00 mm]. For diam- 2.1 The following documents of the issue in effect on the
eters over 0.500 through 0.750 in. [over 12.50 through
dateofmaterialpurchaseformapartofthisspecificationtothe
20.00 mm], the diameter and wall-thickness tolerances and extent referenced herein:
eddy-current test parameters, if required, shall be agreed upon 2
2.2 ASTM Standards:
by the producer and the purchaser. Only tubes in aluminum
B557 Test Methods for Tension Testing Wrought and Cast
1200-H111 and 1235-H111 are sized after extrusion to mini-
Aluminum- and Magnesium-Alloy Products
mize ovalness.
B557M Test Methods for Tension Testing Wrought and Cast
1.2 Alloy and temper designations are in accordance with Aluminum- and Magnesium-Alloy Products (Metric)
ANSI H35.1/H35.1(M). The equivalent Unified Numbering B660 Practices for Packaging/Packing of Aluminum and
System alloy designations are those of Table 1 preceded byA9 Magnesium Products
(for example,A91050 for aluminum 1050), in accordance with B666/B666M Practice for Identification Marking of Alumi-
Practice E527. num and Magnesium Products
B881 Terminology Relating toAluminum- and Magnesium-
NOTE 1—For extruded tubes see Specification B221, and for drawn
Alloy Products
tubes for general-purpose applications see Specification B483.
NOTE 2—Throughout this specification the term alloy in the general B945 Practice forAluminumAlloy Extrusions Press Cooled
sense includes aluminum as well as aluminum alloy.
from an Elevated Temperature Shaping Process for Pro-
NOTE3—Forinch-poundordersspecifyB491;formetricordersspecify
duction of T1, T2, T5 and T10–Type Tempers
B491M. Do not mix units.
B985 Practice for SamplingAluminum Ingots, Billets, Cast-
1.3 For acceptance criteria for inclusion of new aluminum
ings and Finished or Semi-Finished Wrought Aluminum
and aluminum alloys in this specification, see Annex A2.
Products for Compositional Analysis
E29 Practice for Using Significant Digits in Test Data to
1.4 The values stated in either inch-pound or SI units are to
Determine Conformance with Specifications
be regarded separately as standards. The SI units are shown
E34 Test Methods for Chemical Analysis of Aluminum and
either in brackets or in separate tables. The values stated in
3
Aluminum-Base Alloys (Withdrawn 2017)
each system are not exact equivalents; therefore, each system
E215 PracticeforStandardizingEquipmentandElectromag-
must be used independently of the other. Combining values
netic Examination of Seamless Aluminum-Alloy Tube
from two systems will result in nonconformance with the
E527 Practice for Numbering Metals and Alloys in the
specification.
Unified Numbering System (UNS)
1.5 This international standard was developed in accor-
E607 Test Method for Atomic Emission Spectrometric
dance with internationally recognized principles on standard-
1 2
This specification is under the jurisdiction of ASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Wrought Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2015. Published January 2015. Originally the ASTM website.
3
approved in 1969. Last previous edition approved in 2006 as B491/B491M – 06. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0491_B0491M-15. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Co
...
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: B491/B491M − 06 B491/B491M − 15
Standard Specification for
Aluminum and Aluminum-Alloy Extruded Round Tubes for
1
General-Purpose Applications
This standard is issued under the fixed designation B491/B491M; 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.
1. Scope Scope*
1.1 This specification covers aluminum and aluminum-alloy extruded round tubes either in coils or straight lengths, for general
purpose applications such as refrigeration service, gas lines, oil lines, and instrument lines, in the alloys (Note 2) and tempers
shown in Table 2 [Table 3], in outside diameters of 0.250 through 0.750 in. [6.00 through 20.00 mm]. 20.00 mm]. For diameters
over 0.500 through 0.750 in. [over 12.50 through 20.00 mm], 20.00 mm], the diameter and wall-thickness tolerances and
eddy-current test parameters, if required, shall be agreed upon by the producer and the purchaser. Only tubes in aluminum
1200-H111 and 1235-H111 are sized after extrusion to minimize ovalness.
1.2 Alloy and temper designations are in accordance with ANSI H35.1[H35.1M].H35.1/H35.1(M). The equivalent Unified
Numbering System alloy designations are those of Table 1 preceded by A9 (for example, A91050 for aluminum 1050)1050), in
accordance with Practice E527.
NOTE 1—For extruded tubes see Specification B221, and for drawn tubes for general-purpose applications see Specification B483.
NOTE 2—Throughout this specification the term alloy in the general sense includes aluminum as well as aluminum alloy.
NOTE 3—For inch-pound orders specify B491; for metric orders specify B491M. Do not mix units.
1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.
1.4 The values stated in either inch-pound or SI units are to be regarded separately as standards. The SI units are shown either
in brackets or in separate tables. The values stated in each system are not exact equivalents; therefore, each system must be used
independently of the other. Combining values from two systems will result in nonconformance with the specification.
2. Referenced Documents
2.1 The following documents of the issue in effect on the date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B666/B666M Practice for Identification Marking of Aluminum and Magnesium Products
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B945 Practice for Aluminum Alloy Extrusions Press Cooled from an Elevated Temperature Shaping Process for Production of
T1, T2, T5 and T10–Type Tempers
B985 Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for
Compositional Analysis
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E215 Practice for Standardizing Equipment for Electromagnetic Testing of Seamless Aluminum-Alloy Tube
1
This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on Aluminum
Alloy Wrought Products.
Current edition approved March 15, 2006Jan. 1, 2015. Published March 2006January 2015. Originally approved in 1969. Last previous edition approved in 20002006 as
B491/B491MB491/B491M – 06.–00. DOI: 10.1520/B0491_B0491M-06.10.1520/B0491_B0491M-15.
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.
*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 ----------------------
B491/B491M − 15
A,B
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.