1.1 本规范涵盖镁合金压铸件。当前的合金成分在中所示的名称下指定 表1 . 2. （A） 应定期仅对本表中特别提及的元素进行分析。然而，如果在常规分析过程中怀疑或指示存在其他元素，则应进行进一步分析，以确定这些其他元素不超过0.3%。 （B） 以下内容适用于本表中的所有规定限值:为了接受和拒绝，从分析中获得的观察值或计算值应四舍五入到最后一个右侧最近的单位- 按照惯例第3节规定的四舍五入程序，将用于表示规定极限的数字放在手上 E29年 . （C） 如果显示单个单位，则表示允许的最大金额。 （D） ASTM合金名称是根据实践确定的 B951 ，UNS名称是根据实践确定的 E527 . （E） 在合金AS41B、AM50A、AJ52A、AM60B、AJ62A和AZ91D中，如果未满足最低锰极限或最高铁极限，则铁/锰比不得分别超过0.010、0.015、0.015、0.021、0.021和0.032。 （F） 合金AJ52A、AJ62A和AS21B是用于高温应用的专利组合物。 请相关方向ASTM国际提交有关这些成分替代品的识别信息。您的意见将在负责的技术委员会会议上得到仔细考虑，您可能会出席该会议。ASTM国际对与本标准提及的任何项目有关的任何专利权的有效性不持任何立场。明确建议本标准的用户，确定任何此类专利权的有效性以及侵犯此类权利的风险完全由其自行负责。 1.2 以英寸-磅为单位的数值为标准值。括号中的SI值仅供参考。 1.3 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。 1.4 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 magnesium-alloy die castings. Current alloy compositions are specified under the designations shown in Table 1 . 2 (A) Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is suspected or indicated in the course of routine analysis, further analysis shall be made to determine that these other elements are not in excess of 0.3 %. (B) The following applies to all specified limits in this table: For purposes of acceptance and rejection an observed value or a calculated value obtained from analysis should 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 procedure prescribed in Section 3 of Practice E29 . (C) Where single units are shown, these indicate the maximum amounts permitted. (D) ASTM alloy designations were established in accordance with Practice B951 , UNS designations were established in accordance with Practice E527 . (E) In alloys AS41B, AM50A, AJ52A, AM60B, AJ62A, and AZ91D, if either the minimum manganese limit or the maximum iron limit is not met, then the iron/manganese ratio shall not exceed 0.010, 0.015, 0.015, 0.021, 0.021, and 0.032, respectively. (F) Alloys AJ52A, AJ62A, and AS21B are patented compositions for elevated temperature applications. Interested parties are invited to submit information regarding the identification of alternatives to these compositions to ASTM International. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 1.2 The values stated in inch-pound units are standard. The SI values in parentheses are provided for information only. 1.3 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. 1.4 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.