1.1 本规程涵盖了测量无涂层钢板和非金属及金属涂层钢板平面度特性的定义和程序。所述方法旨在设计并用于工厂情况和环境。 1.2 板材应符合以下适当规范的所有要求:规范 A568/A568M 或 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- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 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====== 3.1 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测量钢板产品平面度特性的常用定义和程序。 3.2 板材平整度受轧机工艺因素以及所供应材料的等级、厚度和宽度的影响。这些测量方法为购买者和供应商提供了平面度特性的通用定义和程序。这些定义和测量方法的目的不是提供平面度特性的尺寸规范，而是提供量化平面度异常的通用程序。为了确定是否符合平面度规范，提供了适当ASTM标准的参考。 3.3 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平面度特性。

1.1 This practice covers definitions and procedures for measuring flatness characteristics of uncoated steel sheet and nonmetallic and metallic-coated steel sheet. The methods described are designed and intended to be used in mill situations and environments. 1.2 The sheet shall conform to all the requirements of the appropriate specifications as follows: Specifications A568/A568M or 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— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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 ====== 3.1 This practice provides definitions and procedures commonly used for measuring flatness characteristics 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. 3.2 Sheet flatness is affected by mill process factors plus the grade, thickness, and width of the material supplied. These measuring methods provide purchasers and suppliers with common definitions and procedures for flatness characteristics. The intention of these definitions and measuring methods is not to provide dimensional specifications for flatness characteristics, but rather common procedures for quantifying flatness anomalies. For determining compliance with flatness specifications, references are provided to appropriate ASTM standards. 3.3 This practice may be used by other ASTM Committees and other standards writing bodies for the purpose of measuring flatness characteristics of metal sheet products.