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ASTM D2070 - Thermal Stability of Hydraulic Oils

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.

Scope

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.

Extracted, with permission, from ASTM D2070-16e1 - Thermal Stability of Hydraulic Oils, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete standard may be purchased from ASTM International, astm.org