1.1 本试验方法涵盖了测定非自由流动金属粉末表观密度的程序。它是为那些不能自由流过霍尔流量计漏斗的金属粉末而设计的。 1.2 除用于确定密度的密度和质量值外，使用克每立方厘米（g/cm 3. )而克（g）单位是长期存在的行业惯例，英寸-磅单位的数值应视为标准。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。 1.3 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。 ====意义和用途====== 5.1 本试验方法为评估粉末的重要物理特性（称为表观密度）提供了指南。测量的表观密度与填充固定体积模具型腔的粉末质量有关。本试验结果与粉末在使用过程中的性能之间的相关性程度可能因具体应用而异。然而，请注意，水分、油、硬脂酸、硬脂酸盐、蜡的存在和粉末质量的温度可能会改变粉末的物理特性。

1.1 This test method covers a procedure for determining the apparent density of non-free-flowing metal powders. It is designed for those metal powders that do not freely flow through the Hall flowmeter funnel. 1.2 With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimeter (g/cm 3 ) and gram (g) units is the long-standing industry practice, the values 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. 1.3 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. ====== Significance And Use ====== 5.1 This test method provides a guide for evaluation of an important physical characteristic of a powder known as the apparent density. The measured apparent density bears a relationship to the mass of powder that will fill a fixed volume die cavity. The degree of correlation between the results of this test and the performance of powders during use may vary with each particular application. Note, however, that the presence of moisture, oils, stearic acid, stearates, waxes, and the temperature of the powder mass may alter the physical characteristics of the powder.