Full Description

1.1This practice covers all hydraulic fluids based either on petroleum, synthetic, or naturally-occurring base stocks. It is not intended for water-containing hydraulic fluids.

1.2For determination of viscosities at low temperature, this practice uses millipascalsecond (mPas) as the unit of viscosity. For reference, 1 mPas is equivalent to 1 centipoise (cP). For determination of viscosities at high temperature, this practice uses millimetre squared per second (mm/s) as the unit of kinematic viscosity. For reference, 1 mm/s is equivalent to 1 centistoke (cSt).

1.3This practice is applicable to fluids ranging in kinematic viscosity from about 4 to 150 mm/s as measured at a reference temperature of 40C and to temperatures from50 to+16C for a fluid viscosity of 750 mPas.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.