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Description of ASTM-B234 2017ASTM B234-17Active Standard: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes for Surface Condensers, Evaporators, and Heat ExchangersASTM B234Scope 1.1 This specification2 covers aluminum-alloy (Note 1) drawn seamless round tube in straight lengths designated as shown in Table 2, for use in surface condensers, evaporators, and heat exchangers. Note 1: Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy. Note 2: For drawn seamless tubes used in general applications, see Specifications B210 and B210M; for extruded tubes see Specifications B221 and B221M; for seamless pipe and seamless extruded tube used in pressure applications see Specification B241/B241M; and for structural pipe and tube see Specification B429/B429M.
(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 to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off 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 this 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) Vanadium 0.05 max.
(G) The aluminum content shall be calculated by subtracting from 100.00 % the sum of all the metallic elements
present in amounts of 0.010 % or more, rounded to the second decimal before determining the sum.
(H) Composition of cladding alloy as applied during the course of manufacture. The sample from finished tube
shall not be required to conform to these limits.
(I) In case there is 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” shall be considered the controlling composition. The “Teal Sheets” are available at http://www.aluminum.org/tealsheets.
(A) To determine conformance to this specification, each value for ultimate 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-off method of Practice E29.
(B) The basis for establishment of mechanical property limits is shown in Annex
A1.
(C) Elongation of full-section and cut-out sheet-type specimens is measured in 2 in., of cut-out round
specimens, in 4 × specimen diameter.
1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A91060 for aluminum 1060, in accordance with Practice E527. 1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2. 1.4 This specification is the inch-pound companion to Specification B234M; therefore, no SI equivalents are presented in the specification. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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. Keywords aluminum alloy; drawn seamless tubes; heat exchangers ; ICS Code ICS Number Code 77.150.10 (Aluminium products) DOI: 10.1520/B0234-17 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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