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ASTM D6660-01(2007)

Historical Reaffirmation

Standard Test Method for Freezing Point of Aqueous Ethylene Glycol Base Engine Coolants by Automatic Phase Transition Method

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1.1 This test method covers the determination of the freezing point of an aqueous engine coolant solution.

1.2 This test method is designed to cover ethylene glycol base coolants up to a maximum concentration of 60 % (v/v) in water; however, the ASTM interlaboratory study mentioned in 12.2 has only demonstrated the test method with samples having a concentration range of 40 to 60 % (v/v) water.

Note 1—Where solutions of specific concentrations are to be tested, they shall be prepared from representative samples as directed in Test Method D 1176. Secondary phases separating on dilution need not be separated.

Note 2—The products may also be marketed in a ready-to-use form (prediluted).

1.3 The values stated in SI units are to be regarded as the standard. The values given in parenthesis are for information only.

1.4 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 limitations prior to use.


The freezing point of an engine coolant indicates the coolant freeze protection.

The freezing point of an engine coolant may be used to determine the approximate glycol content, provided the glycol type is known.

Freezing point as measured by Test Method D 1177 or approved alternative method is a requirement in Specifications D 3306 and D 6210.

This test method provides results that are equivalent to Test Method D 1177 and expresses results to the nearest 0.1°C with improved reproducibility over Test Method D 1177.

This test method determines the freezing point in a shorter period of time than Test Method D 1177.

This test method removes most of the operator time and judgement required by Test Method D 1177.

SDO ASTM: ASTM International
Document Number D6660
Publication Date April 1, 2007
Language en - English
Page Count 5
Revision Level 01(2007)
Supercedes
Committee D15.03
Publish Date Document Id Type View
July 1, 2014 D6660-01R14E01 Revision
April 10, 2001 D6660-01E01 Revision
April 10, 2001 D6660-01 Revision
Sept. 1, 2023 D6660-01R23 Reaffirmation
April 1, 2019 D6660-01R19 Reaffirmation
April 1, 2007 D6660-01R07 Reaffirmation