1.1 本试验方法包括使用涂料行业中使用的特定仪器测定有机涂层表面硬度的相对程度。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本试验方法并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 3.1 半个多世纪以来，Sward型硬度摇杆仪器一直被涂料行业用作无损检测仪器，用于测量有机涂层的固化和极限表面硬度（参见参考文献）。 ( 1. ) 通过 ( 2. ) ). 4. 这种测试方法在实验室内可用于快速筛选和测量候选涂层的表面硬度。 注1: 在之前的任务组工作中，旨在建立一种用Sward型硬度摇杆仪器测量有机涂层硬度的ASTM方法，循环试验结果不断显示出较差的实验室间再现性。实验室间缺乏一致性可能是由于仪器之间的尺寸变化造成的，在这方面，接触摇杆环最有可能是罪魁祸首。 Sward型硬度摇杆有几家生产商，他们生产的仪器在净重和环半径方面各不相同。其中一些超过了本试验方法中要求的测量值和净重。

1.1 This test method covers the determination of the relative degree of surface hardness of organic coatings using a specific apparatus used in the coatings industry. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This test method does not purport to address all of the safety problems, 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. ====== Significance And Use ====== 3.1 Sward-type hardness rocker instruments have been used by the coatings industry for more than a half a century as a nondestructive test instrument to measure cure and ultimate surface hardness of organic coatings (see Refs. ( 1 ) through ( 2 ) ). 4 This test method is useful within laboratories to quickly screen and measure the surface hardness of candidate coatings. Note 1: In previous task group work designed to establish an ASTM method for measuring hardness of organic coatings with Sward-type hardness rocker instruments, round-robin test results continually showed poor interlaboratory reproducibility. This lack of interlaboratory agreement could have resulted from dimensional variations among instruments, with the contact rocker rings as the most likely offender in that regard. There are several producers of Sward-type hardness rockers making instruments that differ among themselves in net weight and ring radius. Some of them exceed the measurements and net weight called for in this test method.