ASTM D3520 for Quenching Time of Heat-Treating Fluids
ASTM D3520 Standard Test Method for Quenching Time of Heat-Treating Fluids (Magnetic Quenchometer Method)
1. Scope
1.1 This test method covers a procedure for making a comparative evaluation of the quenching speed characteristics of petroleum fluids used in the quenching of metals by means of the Magnetic Quenchometer.

NOTE 1 - A comparison method for testing the hardenability of steel is Test Method A 255.

NOTE 2 - An additional comparison method for evaluation of the quenching speed characteristics of petroleum fluids used in the quenching of metals is Test Method D6200.

1.2 This test method provides a measure of changes in oil chemistry due to contamination, base oil degradation, and additive drag-out during use. This test measures changes in the quenching speed characteristics of petroleum fluids at the high temperature (>354°C). This test method does not reliably predict metallurgical performance.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.

2. Referenced Documents
2.1 ASTM Standards:
A 255 Test Method for End-Quench Test for Hardenability of Steel
D91 Test Method for Precipitation Number of Lubricating Oils
D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester
D97 Test Method for Pour Point of Petroleum Products
D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
D484 Specification for Hydrocarbon Drycleaning Solvents
D1218 Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
D1744 Test Method for Water in Liquid Petroleum Products by Karl Fischer Reagent
D6200 Test Method for Determining Cooling Characteristics of Quench Oils by Cooling Curve Analysis