1.1 本规程涵盖了测量未涂层钢板和非金属及金属涂层钢板厚度的定义和程序。所述方法设计用于实验室和工厂环境。 1.2 扁钢产品应符合以下适当规范的所有要求:规范 A109/A109M , A505型 , A568/A568M , A635/A635M , A684/A684M 和 A924/A924M . 1.3 数量限制未得到解决，而是在一般要求或单个产品规范或两者中建立；或在适用时，由供应商和用户商定。 1.4 单位- 本规范适用于英寸-磅单位或国际单位制的订单。英寸-磅和国际单位制的数值不一定相等。在本文中，国际单位制显示在括号中。每个系统应独立使用。 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。 ====意义和用途====== 4.1 本规程提供了在采购订单或合同中由买方指定的ASTM委员会A01和A05及其子委员会管辖下，通常用于测量钢板产品厚度的程序。 4.2 厚度是钢板产品的一个重要质量特征。使用手动千分尺准确测量厚度的能力对于确定产品是否符合规范至关重要。 提供了测量钢板产品厚度特性的程序，以便采购商和供应商具有厚度测量的通用测量程序。这些测量方法的目的不是提供厚度特性的尺寸规范，而是提供量化厚度值的通用程序。为确定是否符合厚度规范，请参考适当的ASTM标准。 4.3 本规程可供其他ASTM委员会和其他标准编写机构用于测量金属板产品的厚度。

1.1 This practice covers definitions and procedures for measuring the thickness of uncoated steel sheet and nonmetallic and metallic-coated steel sheet. The methods described are designed and intended for use in both laboratory and plant situations and their environments. 1.2 The flat steel product shall conform to all the requirements of the appropriate specifications as follows: Specifications A109/A109M , A505 , A568/A568M , A635/A635M , A684/A684M , and A924/A924M . 1.3 Quantitative limits are not addressed and are established in the general requirements, or individual product specifications, or both; or when applicable, as agreed to between supplier and user. 1.4 Units— This specification is applicable to orders in either inch-pound units or SI units. Values in inch-pound and SI units are not necessarily equivalent. Within the text, SI units are shown in brackets. Each system shall be used independently of the other. 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. ====== Significance And Use ====== 4.1 This practice provides procedures commonly used for measuring the thickness of steel sheet products under the jurisdiction of ASTM Committees A01 and A05 and their subcommittees as designated by a purchaser in a purchase order or contract. 4.2 Thickness is a significant quality characteristic of steel sheet products. The ability to accurately measure thickness using hand micrometers is critical in determining product conformance to specifications. The procedures for measuring thickness characteristics of steel sheet products are provided so that purchasers and suppliers have common measuring procedures for thickness measurements. The intention of these measuring methods is not to provide dimensional specifications for thickness characteristics, but rather common procedures for quantifying thickness values. For determining compliance with thickness specifications, references are provided to appropriate ASTM standards. 4.3 This practice may be used by other ASTM Committees and other standards writing bodies for the purpose of measuring thickness of metal sheet products.