Significance and Use
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
Copper Development Association Standard
UNSC11000 Electrolytic Tough Pitch Copper
American Iron and Steel Institute Standard (AISI)
W-1 Carbon Tool Steel
Cincinnati Milacron; copper corrosion; heat test; hydraulic oils; oil sludging; steel corrosion; thermal stability; Copper corrosion; Heating tests--petroleum products; Hydraulic fluids/oils; Lubricating oils; Oil sludging; Thermal stability--petroleum products;
ICS Number Code 75.120 (Hydraulic fluids)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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