1.1 本规范涵盖铝合金( 注1 )指定为直线长度的拉制无缝圆管，如 表2 ，用于表面冷凝器、蒸发器和热交换器。 注1: 在本规范中，术语的使用 合金 一般来说，包括铝以及铝合金。 注2: 对于一般应用中使用的拉制无缝管，请参阅规范 B210 和 B210M ; 挤压管见规范 B221页 和 B221M ; 有关压力应用中使用的无缝管和无缝挤压管，请参阅规范 B241/B241M ; 结构管见规范 B429/B429M . （A） 限值以最大百分比表示，除非显示为范围或另有说明。 （B） 应分析本表所示极限的元素。 （C） 为了确定是否符合这些限值，应根据修约实践方法，将从分析中获得的观察值或计算值四舍五入到用于表示指定限值的数字的最后右侧的最近单位 E29年 . （D） 其他 包括未显示具体限制的列出的元素以及未列出的金属元素。生产商可分析样品中本规范中未规定的微量元素。然而，这种分析不是必需的，也可能不包括所有金属材料 其他 元素。如果生产商或买方的任何分析确定 其他 元素超出限制 每个 或者是几个 其他 元素超出限制 全部的 ，材料应视为不合格。 （E） 其他要素 — 全部的 应为未指定金属元素的总和0.010 % 或更多，在确定总和之前四舍五入到第二个小数点。 （F） 钒最大0.05。 （G） 铝含量应从100.00中减去 % 所有金属元素的总和为0.010 % 或更多，在确定总和之前四舍五入到第二个小数点。 （H） 制造过程中应用的覆层合金成分。成品管的样品无需符合这些限制。 （一） 如果表1中列出的值与“锻铝和锻铝合金的国际合金名称和化学成分限值”（称为“Teal表”）中列出的值不一致，则在铝协会注册并在“Teal表”中公布的成分限值应视为控制成分。 “青绿色床单”可在以下网址获得:http://www.aluminum.org/tealsheets. （A） 为了确定是否符合本规范，抗拉强度和屈服强度的每个值应四舍五入至最接近的1 MPa，伸长率的每个值应四舍五入至最接近的0.5 %, 两者都是按照修约方法进行的 E29年 . （B） 机械性能限值的确定依据如所示 附件A1 . 1.2 合金和回火名称符合ANSI H35.1M。等效的统一编号系统合金名称为 表1 前面是 E215年 例如，A91060用于1060铝，符合惯例 E527 . 1.3 有关本规范中包含新铝和铝合金的验收标准，请参阅 附件A1 . 1.4 本规范是规范的SI配套规范 B234页 . 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers aluminum-alloy ( Note 1 ) drawn seamless round tube in straight lengths designated as shown in the 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 tensile strength and for yield strength shall be rounded to the nearest 1 MPa 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 . 1.2 Alloy and temper designations are in accordance with ANSI H35.1M. The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by E215 , 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 A1 . 1.4 This specification is the SI companion to Specification B234 . 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.