This standard specifies a laboratory test using a nickel-alloy probe for the determination of the cooling characteristics of industrial quenching oils. The test is conducted in non-agitated oils and thus is able to rank the cooling characteristics of the different oils under standard conditions. No correlation can be made between the results of this test and the quench rates in industrial quench installations in which varying degrees of agitation are present.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
ISO 2719:1988 Petroleum Products and Lubricants - Determination of Flash Point-Pensky-Martens Closed Cup Method
ISO 2909:1981 Petroleum Products - Calculation of Viscosity Index from Kinematic Viscosity
ISO 3104:1994 Petroleum Products - Transparent and Opaque Liquids - Determination of Kinematic Viscosity and Calculation of Dynamic Viscosity
ISO 3405:1988 Petroleum Products - Determination of Distillation Characteristics
ISO 3675:1993 Crude Petroleum and Liquid Petroleum Products - Laboratory Determination of Density or Relative Density Hydrometer Method
BS 1041, Part 4:1966 Thermocouples
BS 4937, Part 4:1973 Niekelchromium/Nickel-aluminium Thermocouples, Type K
3 Principle
A cylindrical nickel-alloy test piece ("probe") having a thermocouple at its geometric centre is heated in a furnace to the specified temperature, and then transferred into a fixed volume of the quenching oil under test. The change in temperature at the centre of the probe is recorded as a function of time.
