1.1 本试验方法评估润滑脂和润滑液与从标准弹性体板上切下的试样的兼容性（实施规程 D3182 ). 通过确定弹性体试样在100°C或150°C或润滑剂规范要求的试验温度下完全浸入润滑剂样品70小时或润滑剂规范规定的持续时间时发生的体积和硬度计A硬度的变化来评估兼容性。 1.1.1 一些润滑剂规格可能需要不同的弹性体或测试条件，例如更长的持续时间或更低或更高的温度。在这种情况下，第节中规定的重复性和再现性值 12 不适用，用户和供应商应就可接受的精度限制达成一致。 注1: 本试验方法的范围现在包括评估润滑液和润滑脂的弹性体兼容性。试验方法中不包括流体试验 D4289 95及更早版本。 1.2 本试验方法也可用作评估润滑脂与非标准片状橡胶制品相容性的指南（实施规程 D3183 ). 1.3 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 1.3.1 例外情况-- 当列出时，硬度计A单位应被视为标准。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体的警告声明，请参阅 8.4 – 8.6 . 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 测量弹性体在浸入润滑脂或流体中时体积和硬度的变化，为评估相对兼容性提供了一种方法。该试验方法的大部分内容源于试验方法中描述的程序 D471 ISO 1817和FED-STD-791，方法3603。与这两种测试方法不同，这两种方法强调橡胶和橡胶的评估- 类似化合物，试验方法 D4289 该测试方法专为评估润滑脂和润滑液而开发，特别是用于汽车应用的润滑脂和液体，尽管该测试方法也可应用于工业应用中的润滑剂。除肖氏硬度计A外，该测试方法不需要专门的橡胶测试设备。程序中规定的几乎所有其他设备和用品都是润滑油实验室的库存物品。 5.2 通过该试验方法确定的体积和硬度变化值不会重复实际使用条件下弹性密封件中发生的类似变化。然而，在许多情况下，它们可以相互关联。在一个这样的例子中，由该测试方法的前件确定的体积变化值相互关联( r 2. =0.99）与车辆测试期间发生的情况相比。 7. 由于使用条件存在很大差异，润滑脂和弹性体配方也存在差异，因此应单独确定用这种测试方法获得的结果与特定应用之间的相关性。 5.3 对于需要参考弹性体AMS 3217/2C或AMS 3217/3B以外的弹性体的规范，从标准片材上切下的试样（实施规程 D3182 )应该使用。当制备此类试样不可行，或润滑剂规范要求使用尺寸或配置不适合制备试验试样的橡胶制品时（实施规程 D3183 )，该测试方法可作为评估兼容性的指南。 注4: 由于精度值仅适用于试验方法附录A1中规定的弹性体 D4289 ，当润滑剂规格要求使用其他弹性体时，润滑剂的用户和供应商应同意可接受的精度值。这些值可能与试验方法中的值相同，也可能不同 D4289 建议在用户的润滑剂规格中说明商定的精度值。 5.4 该试验方法的结果最适用于与弹性体密封件、防尘套、O型圈和类似产品接触的润滑脂和液体的使用，其中对弹性体的物理要求并不极端。在润滑剂将与承受严重弯曲、极端温度或类似应力的橡胶部件接触的关键应用中，还应评估其他橡胶性能，如抗拉强度和伸长率，因为它们可能更能反映真实的相容性特征。

1.1 This test method evaluates the compatibility of lubricating greases and fluids with coupons cut from standard elastomer sheets (Practice D3182 ). Compatibility is evaluated by determining the changes in volume and Durometer A hardness that occur when elastomer coupons are totally immersed in a lubricant sample for 70 h or for a duration as required by the lubricant specification at either 100 °C or 150 °C or at a test temperature as required by the lubricant specification. 1.1.1 Some lubricant specifications may require different elastomers or test conditions, such as longer durations or lower or higher temperatures. In such instances, the repeatability and reproducibility values stated in Section 12 do not apply, and the user and supplier should agree on acceptable limits of precision. Note 1: The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases. Testing of fluids was not included in Test Method D4289 –95 and earlier versions. 1.2 This test method can also be used as a guide to evaluate the compatibility of greases with rubber products not in standard sheet form (Practice D3183 ). 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3.1 Exception— When listed, Durometer A units shall be regarded as the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 8.4 – 8.6 . 1.5 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 Measurement of the changes in the volume and hardness of an elastomer that occur from immersion in a lubricating grease or fluid provides a means for evaluating relative compatibility. Much of this test method was derived from procedures described in Test Method D471 , ISO 1817, and FED-STD-791, Method 3603. In contrast to these two test methods, which emphasize the evaluation of rubber and rubber-like compounds, Test Method D4289 was developed specifically to evaluate lubricating greases and fluids, especially those used in automotive applications, although the test method can be applied to lubricants used in industrial applications as well. Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment. Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories. 5.2 The volume and hardness-change values determined by this test method do not duplicate similar changes that occur in elastomeric seals under actual service conditions. However, they can be correlated in many instances. In one such instance, the volume-change values determined by the antecedent of this test method correlated ( r 2 = 0.99) with those that occurred during a vehicle test. 7 Because of wide variations in service conditions and differences in grease and elastomer formulations, correlations between the results obtained with this test method and particular applications should be determined on an individual basis. 5.3 With specifications requiring elastomers other than Reference Elastomers AMS 3217/2C or AMS 3217/3B, coupons cut from standard sheets (Practice D3182 ) should be used. When the preparation of such coupons is not feasible, or the lubricant specification requires the use of rubber products that do not have a suitable size or configuration for use in preparing coupons for testing (Practice D3183 ), this test method can be used as a guide for evaluating compatibility. Note 4: Inasmuch as the precision values apply only to the elastomers specified in Annex A1 of Test Method D4289 , when a lubricant specification requires some other elastomer, the user and supplier of the lubricant should agree to the values of acceptable precision. Such values may or may not be the same as those of Test Method D4289 . It is recommended that the agreed upon precision values be stated in the user's lubricant specification. 5.4 The results of this test method are most applicable to the use of lubricating greases and fluids in contact with elastomeric seals, boots, O-rings, and similar products, where the physical demands on the elastomer are not extreme. In critical applications where the lubricant will be in contact with rubber parts subject to severe flexing, extreme temperatures, or similar stresses, other rubber properties, such as tensile strength and elongation, should also be evaluated as they may be more indicative of the true compatibility characteristics.