1.1本方法 , , 介绍了使用陆军弹道导弹局（ABMA）型冲击测试仪在冲击能量下测定材料与液态氧的相容性和相对灵敏度。对液氧冲击敏感的材料通常也对氧存在下其他形式能量的反应敏感。 1.2本标准应用于测量和描述受控实验室条件下材料、产品或组件对热量和火焰的响应特性，不应用于描述或评估实际火灾条件下材料、产品或组件的火灾危险或火灾风险。然而，该测试结果可作为火灾风险评估的要素，该评估考虑了与特定最终用途火灾危险评估相关的所有因素 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====== 当使用本试验方法测量材料的阈值冲击敏感性时，可获得相对敏感性评估，从而对材料进行排序。 本试验方法也可用于对液氧系统中使用的材料进行验收试验。浸入液氧中的20个单独的材料样品经受98 J（72 ft · lbf）或按规定。通过12.7毫米( ½ -英寸。）直径接触。一个以上的灵敏度指示是立即拒绝的原因。在最初的20个测试系列中，一次爆炸、闪光或其他灵敏度指示需要额外测试40个样品，以确保材料的可接受性。 阈值由该试验方法在环境压力下确定。已知材料对机械冲击的敏感性随着压力的增加而增加。由于大多数液氧系统在高于环境条件的压力下运行，在选择用于加压系统的材料时，应考虑在更高压力下提高材料的灵敏度和反应性。

1.1 This method , , covers the determination of compatibility and relative sensitivity of materials with liquid oxygen under impact energy using the Army Ballistic Missile Agency (ABMA)-type impact tester. Materials that are impact-sensitive with liquid oxygen are generally also sensitive to reaction by other forms of energy in the presence of oxygen. 1.2 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use 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 ====== When this test method is used to measure the threshold impact sensitivity of a material, a relative sensitivity assessment is obtained which permits the ranking of materials. This test method may also be used for acceptance-testing materials for use in liquid oxygen systems. Twenty separate samples of the material submerged in liquid oxygen are subjected to 98 J (72 ft · lbf) or as specified. Impact energy delivered through a 12.7-mm ( ½ -in.) diameter contact. More than one indication of sensitivity is cause for immediate rejection. A single explosion, flash, or other indication of sensitivity during the initial series of 20 tests requires that an additional 40 samples be tested without incident to ensure acceptability of the material. The threshold values are determined by this test method at ambient pressure. The sensitivity of materials to mechanical impact is known to increase with increasing pressure. Since most liquid oxygen systems operate at pressures above ambient condition, some consideration should be given to increased sensitivity and reactivity of materials at higher pressure when selecting materials for use in pressurized system.