FED-STD-791D
Method 1110.2
September 30, 1986
QUENCHING SPEED
1. SCOPE
1.1 This method is used to determine the quenching speed or rate of heat removal
provided by quenching oils.
2. SUMMARY.
2.1 The test consists of immersing heated steel test bars in samples of the test quench oil.
From temperatures recorded during the test procedure the quenching speed of the oil is
calculated.
3. SAMPLE SIZE.
3.1 Approximately 4.5 L (1.2 gal) of quenching oil to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 One electric timer, graduated in 1/10 seconds.
4.2 Two containers, insulated with 5.1 cm (2 in) of insulation, approximately 30.5 cm
(12 in) deep and 11.4 cm (4-1/2 in) wide (inside dimensions).
4.3 One stirrer, electric, of proper size to stir contents of containers.
4.4 One thermometer, 0-100C, with 1/10 graduations.
4.5 One furnace, controlled atmosphere, capable of being controlled at 816 14C
(1500 25F).
4.6 One hook, steel, approximately 0.64 cm (1/4 in) diameter by approximately 1.2 m (4
ft) long (to lift and carry test bars).
5. MATERIALS
5.1 CAUTION - SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
chemical materials listed in this section must be handled carefully. Federal Test Method 10000,
Material Handling Safety Precautions, is a reference which lists all toxic and hazardous materials
cited in FTMS 791. The synonyms, life hazard, flammability, handling and storage precautions,
emergency treatment and measures, and spill practices of each chemical are explained.
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