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Significance and Use
5.1 The freezing point of an engine coolant indicates the coolant freeze protection.
5.2 The freezing point of an engine coolant may be used to determine the approximate glycol content, provided the glycol type is known.
5.3 Freezing point as measured by Test Method or approved alternative method is a requirement in Specifications and .
5.4 This test method provides results that are equivalent to Test Method and expresses results to the nearest 0.1°C with improved reproducibility over Test Method .
5.5 This test method determines the freezing point in a shorter period of time than Test Method .
5.6 This test method removes most of the operator time and judgement required by Test Method .
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 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 . 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 standard. No other units of measurement are included in this standard.
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. Some specific hazards statements are given in .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1176 Practice for Sampling and Preparing Aqueous Solutions of Engine Coolants or Antirusts for Testing Purposes
D1177 Test Method for Freezing Point of Aqueous Engine Coolants
D3306 Specification for Glycol Base Engine Coolant for Automobile and Light-Duty Service
D6210 Specification for Fully-Formulated Glycol Base Engine Coolant for Heavy-Duty Engines
ICS Number Code 19.040 (Environmental testing); 71.100.45 (Refrigerants and antifreezes)