Mineral Hydraulic Oils, ASTM D 6158 Specification
Qualification Tests for Refined Base Oils
Class HH

Test Description

Method

Physical Properties:

ISO Viscosity Grade

ASTM D 2422

Viscosity, Kinematic, at 40 ° C, cSt

ASTM D 445.a

Viscosity, Low Temperature of Lubricants, by Brookfield Viscometer

ASTM D 2983

Viscosity, Index

ASTM D 2270

Density and Relative Density of Liquids by Digital Density Meter

ASTM D 4052

Physical Appearance

Visual

Flash Point, Cleveland Open Cup

ASTM D 92.a

Pour Point of Petroleum Oils

ASTM D 97

Chemical Properties:

Acid Number, Color-Indicator Titration

ASTM D 974.a

Performance Tests:

Elastomer Compatibility, Hardness and Relative Volume Change

ASTM D 471

Optional Tests:

Acid Number of Petroleum Products, Potentiometric Titration

ASTM D 664

API Gravity of Petroleum Products, Hydrometer Method (Density, Relative Density, Specific Gravity)

ASTM D 1298