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Significance and Use
4.1 Thermal stability characterizes physical and chemical property changes which may adversely affect an oil's lubricating performance. This test method evaluates the thermal stability of a hydraulic oil in the presence of copper and steel at 135 °C. Rod colors are the evaluation criteria. Sludge values are reported for informational purposes. No correlation of the test to field service has been made.
1.1 This test method is designed primarily to evaluate the thermal stability of hydrocarbon based hydraulic oils although oxidation may occur during the test.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Copper Development Association StandardUNS C11000 Electrolytic Tough Pitch Copper
American Iron and Steel Institute Standard (AISI)W-1 Carbon Tool Steel
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
ICS Number Code 75.120 (Hydraulic fluids)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D2070-16e1, Standard Test Method for Thermal Stability of Hydraulic Oils, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top