1.1本试验方法描述了一种程序，用于测定金属基材上有机涂层（油漆）的柔韧性和附着力，当板材制造成建筑面板或其他产品时，金属基材因弯曲而变形。 1.2金属基材必须能够在不发生破裂和过度晶粒发育的情况下通过本试验。 1.3以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 当通过滚压成型、制动器弯曲或其他变形过程制造成产品时，预涂层板上的有机涂层会受到应力的影响。这些应力可能超过涂层的柔韧性或粘合强度，导致暴露基材的涂层断裂，或导致涂层与基材的附着力丧失。 该试验是评估涂层系统承受制造应力能力的一种方法。 弯曲方向，无论弯曲轴是横向还是沿金属轧制方向，以及弯曲时试样的温度都会影响本试验的结果，供应商和用户应就此达成一致。

1.1 This test method describes a procedure for determining the flexibility and adhesion of organic coatings (paints) on metallic substrates that are deformed by bending when the sheet is fabricated into building panels or other products. 1.2 The metal substrate must be capable of passing this test without fracturing and with no excessive grain development. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== Organic coatings on precoated sheet are subjected to stresses when fabricated into products by roll forming, brake bending, or other deformation processes. These stresses can exceed the flexibility or adhesive strength of the coating, resulting in fracture of the coating which exposes the substrate, or in the loss of adhesion of the coating to the substrate. This test is a means of evaluating the ability of a coating system to withstand the stresses of fabrication. The bend direction, whether the axis of bend is transverse to or along the rolling direction of the metal, and the temperature of the specimen when it is bent can affect the results of this test and should be agreed upon between the supplier and the user.