1.1本试验方法涵盖了使用普通粉末冶金（PM）轴承或薄壁空心圆柱试样测定材料径向抗压强度的设备和实验室程序。这是一种产生定量结果的破坏性测试。 1.2 局限性 : 1.2.1本程序的原理基于被测材料具有最小延展性。试验期间圆柱体的永久挠度不应超过外径的10%。 1.2.2如果试样的壁厚大于外径的三分之一，则径向抗压强度试验结果只能用作指导。这些试验结果只能用于与类似材料和类似尺寸的试样数据进行比较。 1.3密度值除外，其g/cm 3. 单位为行业标准，数值单位为英寸- 磅单位应视为标准单位。括号中所示的国际单位制数值已根据IEEE/ASTM标准SI 10进行转换，可能是近似值，仅供参考。 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====== 径向抗压强度试验是一种破坏性程序，用于确定粉末冶金轴承和空心圆柱试样的材料强度特性。这些数据可用于对材料进行分级、分类和评估。 PM轴承规格 B438页 和 B439页 要求使用本试验方法作为油浸烧结轴承强度的验收试验。 该试验方法可用于粉末制造商和零件制造商，作为用于生产多孔零件的金属粉末和润滑粉末混合物的批量验收试验。 粉末冶金行业的公司将此测试用作制造控制测试，因为它适用于生产实践。 径向抗压强度是粉末冶金材料的特性，但不是设计值。然而，经验表明，材料的径向抗压强度约为极限抗拉强度的两倍。

1.1 This test method covers the equipment and laboratory procedure for the determination of the radial crushing strength of materials using either a plain powder metallurgy (PM) bearing or a thin-walled hollow cylindrical test specimen. This is a destructive test that produces quantitative results. 1.2 Limitations : 1.2.1 The principle of this procedure is based on the material being tested having minimal ductility. The permanent deflection of the cylinder during the test should not exceed 10 % of the outside diameter. 1.2.2 The radial crushing strength test results should be used only as a guide if the test specimen has a wall thickness that is greater than one-third of the outside diameter. These test results should then only be used for comparison with data from the test specimens of like materials and similar dimensions. 1.3 With the exception of density values, for which the g/cm 3 unit is the industry standard, the values stated in inch-pound units are to be considered the standard. The values in SI units, shown in parenthesis have been converted in accordance with IEEE/ASTM Standard SI 10, may be approximate and are only included for information. 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 ====== The radial crushing strength test is a destructive procedure used to determine a material strength characteristic of PM bearings and hollow cylindrical test specimens. These data can be used to grade, classify, and evaluate the materials. The PM bearing Specifications B438 and B439 require the use of this test method as an acceptance test for the strength of oil-impregnated sintered bearings. This test method may be used by powder producers and parts manufacturers as a lot acceptance test for metal powders and lubricated powder mixtures intended for the production of porous parts. Companies in the PM industry use this test as a manufacturing control test because it is appropriate for production practices. Radial crushing strength is a property of the PM material but is not a design value. However, experience has shown that the radial crushing strength of a material is approximately twice the ultimate tensile strength.