ASTM D7646-23
(Test Method)Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants for Aluminum Alloys by Cooling Curve Analysis
Standard Test Method for Determination of Cooling Characteristics of Aqueous Polymer Quenchants for Aluminum Alloys by Cooling Curve Analysis
SIGNIFICANCE AND USE
5.1 This test method provides a cooling time versus temperature pathway. The results obtained by this test method may be used as a guide in quenchant selection or comparison of quench severities of different quenchants, new or used.
SCOPE
1.1 This test method covers the description of the equipment and the procedure for evaluating quenching characteristics of aqueous polymer quenchants by cooling rate determination.
1.2 This test method is designed to evaluate aqueous polymer quenchants for aluminum alloys in a non-agitated system. There is no correlation between these test results and the results obtained in agitated systems.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7646 − 23
Standard Test Method for
Determination of Cooling Characteristics of Aqueous
Polymer Quenchants for Aluminum Alloys by Cooling Curve
1
Analysis
This standard is issued under the fixed designation D7646; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Comparison Techniques
E230 Specification for Temperature-Electromotive Force
1.1 This test method covers the description of the equipment
(emf) Tables for Standardized Thermocouples
and the procedure for evaluating quenching characteristics of
3
2.2 ISO Standards:
aqueous polymer quenchants by cooling rate determination.
ISO 3819 Laboratory Glassware—Beakers
1.2 This test method is designed to evaluate aqueous poly-
4
2.3 Japanese Industrial Standards:
mer quenchants for aluminum alloys in a non-agitated system.
JIS K 2242 Heat Treating Oil
There is no correlation between these test results and the results
5
2.4 Wolfson Engineering Group Specification:
obtained in agitated systems.
Laboratory Tests for Assessing the Cooling Curve of Indus-
1.3 The values stated in SI units are to be regarded as
trial Quenching Media
standard. No other units of measurement are included in this
3. Terminology
standard.
1.4 This standard does not purport to address all of the 3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- to Terminology D4175.
3.2 Definitions of Terms Specific to This Standard:
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 3.2.1 aqueous polymer quenchant, n—aqueous solution
containing a water soluble polymer; typically including poly-
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard- (alkylene glycol), poly(ethyl oxazoline), poly(sodium acrylate)
ization established in the Decision on Principles for the and poly(vinyl pyrrolidone). The quenchant solution also
Development of International Standards, Guides and Recom- typically contains additives for corrosion and foam control, if
mendations issued by the World Trade Organization Technical needed. Quench severity of aqueous polymer quenchants is
Barriers to Trade (TBT) Committee. dependent on concentration and molecular weight of the
specific polymer being evaluated, quenchant temperature, and
2. Referenced Documents
agitation rate.
2
2.1 ASTM Standards: 3.2.2 characteristic temperature, n—transition temperature
D4175 Terminology Relating to Petroleum Products, Liquid from vapor blanket phase (film boiling phase) to rapid cooling
Fuels, and Lubricants phase (nucleate boiling phase) on cooling curve.
D6200 Test Method for Determination of Cooling Charac-
3.2.3 cooling curve, n—cooling curve is a graphical repre-
teristics of Quench Oils by Cooling Curve Analysis
sentation of the cooling time (t)–temperature (T) response of
E220 Test Method for Calibration of Thermocouples By
the probe (see 7.3). An example is illustrated in Part B of Fig.
1.
3.2.4 cooling curve analysis, n—the process of quantifying
1
This test method is under the jurisdiction of ASTM Committee D02 on
the cooling characteristics of a heat treating oil based on the
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.L0.06 on Non-Lubricating Process Fluids.
Current edition approved July 1, 2023. Published August 2023. Originally
3
approved in 2010. Last previous edition approved in 2019 as D7646 – 10 (2019). Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,
DOI:10.1520/D7646-23. PA 15096, http://www.sae.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Japanese Standards Association (JSA), Mita MT Bldg., 3-13-12
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.
5
Standards volume information, refer to the standard’s Document Summary page on Available from Wolfson Heat Treatment Centre, Aston University, Aston
the ASTM website. Triangle, Birmingham B4 7ET, England, http://www.sea.org.uk/whtc/.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unite
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7646 − 10 (Reapproved 2019) D7646 − 23
Standard Test Method for
Determination of Cooling Characteristics of Aqueous
Polymer Quenchants for Aluminum Alloys by Cooling Curve
1
Analysis
This standard is issued under the fixed designation D7646; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This test method covers the description of the equipment and the procedure for evaluating quenching characteristics of aqueous
polymer quenchants by cooling rate determination.
1.2 This test method is designed to evaluate aqueous polymer quenchants for aluminum alloys in a non-agitated system. There is
no correlation between these test results and the results obtained in agitated systems.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D6200 Test Method for Determination of Cooling Characteristics of Quench Oils by Cooling Curve Analysis
E220 Test Method for Calibration of Thermocouples By Comparison Techniques
E230 Specification for Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples
3
2.2 ISO Standards:
ISO 3819 Laboratory Glassware—Beakers
4
2.3 Japanese Industrial Standards:
JIS K 2242 Heat Treating Oil
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.L0.06 on Non-Lubricating Process Fluids.
Current edition approved May 1, 2019July 1, 2023. Published July 2019August 2023. Originally approved in 2010. Last previous edition approved in 20142019 as
D7646 – 10 (2014).(2019). DOI:10.1520/D7646-10R19.DOI:10.1520/D7646-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096, http://www.sae.org.
4
Available from Japanese Standards Association (JSA), Mita MT Bldg., 3-13-12 Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D7646 − 23
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2.4 Wolfson Engineering Group Specification:
Laboratory Tests for Assessing the Cooling Curve of Industrial Quenching Media
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology D4175.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 aqueous polymer quenchant, n—aqueous solution containing a water soluble polymer; typically including poly(alkylene
glycol), poly(ethyl oxazoline), poly(sodium acrylate) and poly(vinyl pyrrolidone). The quenchant solution also typically contains
additives for corrosion and foam control, if needed. Quench severity of aqueous polymer quenchants is dependent on concentration
and molecular weight of the specific polymer being evaluated, quenchant temperature, and agitation rate.
3.2.2 characteristic temperature, n—transition temperature from vapor blanket phase (film boiling phase) to rapid cooling phase
(nucleate boiling phase) on cooling curve.
3.2.3 cooling curve, n—cooling curve is a graphical representation of the cooling time (t)–temperature (T) response of the probe
(see 7.3). An example is illustrated in Part B o
...
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