ASTM D2070 – Standard Test Method for Thermal Stability of Hydraulic Oils
Description:
Significance and Use
5.1 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. No correlation of the test to field service has been made.
Scope
1.1 This test method2 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.
ASTM D2069