Standard Test Method for
Quenching Time of Heat-Treating Fluids (Magnetic
This standard is issued under the fixed designation D 3520; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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 D 6200.
1.2 This test method provides a measure of changes in soil
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 a 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: 2
A 255 Test Method for End-Quench Test for Hardenability
D 91 Test Method for Precipitation Number of Lubricating
D 92 Test Method for Flash and Fire Points by Cleveland
Open Cup Tester
D 97 Test Method for Pour Point of Petroleum Products
D 287 Test Method for API Gravity of Crude Petroleum and
Petroleum Products (Hydrometer Method)
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