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ASTM D6158-99

(Specification)

Standard Specification for Mineral Hydraulic Oils

Standard Specification for Mineral Hydraulic Oils

SCOPE
1.1 This specification covers mineral oils used in hydraulic systems, where the performance requirements demand fluids with one of the following characteristics:
1.1.1 A refined base oil (Class HH).  
1.1.2 A refined mineral base oil with rust and oxidation inhibitors (Class HL), and  
1.1.3 A refined mineral base oil with rust and oxidation inhibitors plus antiwear characteristics (Class HM).

General Information

Status
Historical
Publication Date
09-Dec-1999
ICS
75.120 - Hydraulic fluids
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.N0.10 - Specifications
Current Stage
Ref Project

Relations

Replaced By
ASTM D6158-05 - Standard Specification for Mineral Hydraulic Oils
Effective Date
01-Jun-2005
Referred By
ASTM D7752-18 - Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids
Effective Date
10-Dec-1999
Referred By
ASTM D8506-23 - Standard Guide for Microbial Contamination and Biodeterioration in Turbine Oils and Turbine Oil Systems
Effective Date
10-Dec-1999

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ASTM D6158-99 - Standard Specification for Mineral Hydraulic OilsASTM D6158-99 - Standard Specification for Mineral Hydraulic Oils
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ASTM D6158-99 - Standard Specification for Mineral Hydraulic Oils
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 6158 – 99
Standard Specification for
Mineral Hydraulic Oils
This standard is issued under the fixed designation D 6158; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope and Opaque Liquids (the Calculation of Dynamic Viscos-
ity)
1.1 This specification covers mineral oils used in hydraulic
D 471 Test Method for Rubber Property—Effect of Liq-
systems, where the performance requirements demand fluids
uids
with one of the following characteristics:
D 664 Test Method forAcid Number of Petroleum Products
1.1.1 A refined base oil (Class HH),
by Potentiometric Titration
1.1.2 A refined mineral base oil with rust and oxidation
D 665 Test Method for Rust-Preventing Characteristics of
inhibitors (Class HL), and
Inhibited Mineral Oil in the Presence of Water
1.1.3 A refined mineral base oil with rust and oxidation
D 892 Test Method for Foaming Characteristics of Lubri-
inhibitors plus antiwear characteristics (Class HM).
cating Oils
1.2 This specification defines the requirements of mineral
D 943 Test Method for Oxidation Characteristics of Inhib-
oil-based hydraulic fluids that are compatible with most
ited Mineral Oils
existing machinery components when there is adequate main-
D 974 Test Method for Acid and Base Number by Color-
tenance.
Indicator Titration
1.3 This specification defines only new lubricating oils
D 1298 Practice for Density, Relative Density (Specific
before they are installed in the hydraulic system.
Gravity), or API Gravity of Crude Petroleum and Liquid
1.4 This specification defines specific types of hydraulic
Petroleum Products by Hydrometer Method
oils.Itdoesnotincludeallhydraulicoils.Someoilsthatarenot
D 1401 Test Method for Water Separability of Petroleum
included may be satisfactory for certain hydraulic applications.
Oils and Synthetic Fluids
Certain equipment or conditions of use may permit or require
D 2070 Test Method for Thermal Stability of Hydraulic
a wider or narrower range of characteristics than those de-
Oils
scribed herein.
D 2270 Practice for Calculating Viscosity Index from Kine-
1.5 The following safety hazard caveat pertains to the test
matic Viscosity at 40 and 100°C
methods referenced in this specification. This standard does
D 2422 Classification of Industrial Fluid Lubricants by
not purport to address all of the safety concerns, if any,
Viscosity System
associated with its use. It is the responsibility of the user of this
D 2619 Test Method for Hydrolytic Stability of Hydraulic
standard to establish appropriate safety and health practices
Fluids (Beverage Bottle Method)
and determine the applicability of regulatory limitation prior
D 2882 Test Method for Indicating theWear Characteristics
to use.
of Petroleum and Non-Petroleum Hydraulic Fluids on a
2. Referenced Documents
Constant Volume Vane Pump
D 2983 Test Method for Low-Temperature Viscosity of
2.1 ASTM Standards:
Automotive Fluid Lubricants Measured by Brookfield
D 92 Test Method for Flash and Fire Points by Cleveland
Viscometer
Open Cup
D 3427 Test Method for Air Release Properties of Petro-
D 97 Test Method for Pour Point of Petroleum Oils
leum Oils
D 130 Test Method for Detection of Copper Corrosion from
D 4052 Test Method for Density and Relative Density of
Petroleum Products by the Copper Strip Tarnish Test
Liquids by Digital Density Meter
D 445 Test Method for Kinematic Viscosity of Transparent
D 4310 Test Method for Determination of the Sludging and
Corrosion Tendencies of Inhibited Mineral Oils
This specification is under the jurisdiction of ASTM Committee D-2 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.N on Hydraulic Fluids.
Current edition approved Dec. 10, 1999. Published February 2000. Originally
published as D 6158 – 97. Last previous edition D 6158 – 97. Annual Book of ASTM Standards, Vol 09.01.
2 4
Annual Book of ASTM Standards, Vol 05.01. Annual Book of ASTM Standards, Vol 05.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6158–99
D 6080 Practice for Defining the Viscosity Characteristics systems where equipment is intended to operate over a wide
of Hydraulic Fluids range of ambient temperatures.
3. Classification
4. Classification Requirements
3.1 Type HH Hydraulic Oils—Non-inhibited refined min-
4.1 Type HH—The requirements for this type of oil are
eral oils for hydraulic systems that do not have specific
presented in Table 1 and include Viscosity Grades ISO VG
requirementsofoxidationstability,rustprotection,oranti-wear
from 10 to 150, in accordance with Classification D 2422.
properties. Type HH oils are usually intended for total loss
4.2 Type HL—The requirements for this type of oil are
systems or very light-duty equipment.
presented in Table 2 and include Viscosity Grades ISO VG
3.2 Type HL Hydraulic Oils—Refined mineral oils with
from 10 to 150, in accordance with Classification D 2422.
improved rust protection and oxidation stability for hydraulic
4.3 Type HM—The requirements for this type of oil are
systemswhererelativelyhightemperaturesandlongperiodsof
presented in Table 3 and include Viscosity Grades ISO VG
operation time are expected, and where there is the possibility
from 10 to 150, in accordance with Classification D 2422.
of water or humidity that could rust metal parts of the
4.4 Type HV—The requirements for this type of oil are
machinery.These oils are intended for use in systems where no
presented in Table 4 and include Viscosity Grades ISO VG
metal to metal contact is expected between the moving parts.
from 10 to 150, in accordance with Classification D 2422.
Usually systems working at low pressures specify HL oils.
Some high-pressure piston pumps can operate satisfactorily on
5. Inspection
these oils.
5.1 Inspection of the material shall be agreed upon between
3.3 Type HM Hydraulic Oils—Oils of HL type with im-
the purchaser and the supplier.
proved anti-wear properties, for general hydraulic systems,
especially for those working at high pressures and where the
6. Packaging and Package Marking
possibility of metal to metal contact between the moving parts
6.1 The material shall be suitably packaged to permit
exists. Type HM oils are usually specified for hydraulic
acceptance by the carrier and to afford adequate protection
systems with vane pumps, or when the system is intended to
fromnormalhazardsofhandlingandshipping.Packagingshall
work at maximum pump capacity for long periods of time.
conform to applicable carrier rules and regulations.
3.4 Type HV Hydraulic Oils—Oils of HM type with im-
6.2 Packaging and labeling shall comply with state or
proved viscosity/temperature properties, for general hydraulic
federal regulations.
6.3 Each container shall be plainly marked with the manu-
facturer’snameandbrand,productioncodeorlotnumber,type
Annual Book of ASTM Standards, Vol 05.03.
TABLE 1 Requirements for Type HH Mineral Oil Hydraulic Fluids
Test Method
Properties ASTM (Other) Parameters Limits
Physical
ISO viscosity grade D 2422 10 15 22 32 46 68 100 150
Viscosity D 445 kinematic viscosity at 9.0-11.0 13.5-16.5 19.8-24.2 28.8-35.2 41.4-50.6 61.2-74.8 90.0-110 135-165
40°C, cSt
A
Viscosity,# 750 cP D 2983 temperature, °/C report report report report report report report report
Viscosity index D 2270 report report report report report report report report
B
Specific gravity D 1298 report report report report report report report report
Appearance Visual clear and clear and clear and clear and clear and clear and clear and clear and
bright bright bright bright bright bright bright bright
Flash point D 92 temperature, °C, min 125 145 165 175 185 195 205 215
Pour point D 97 temperature, °C, max -15 -12 -9 -6 -6 -6 -6 -6
Chemical
Acid number D 974/D 664 mg KOH/g, max 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05
Performance
Elastomer D 471 100 6 1°C/288 6 2h report report report report report report report report
compatibility 6 2h SRE-NBR 1
Elastomer (DIN53 538,
Part 1 or
AMA 524, Part 1)
relative volume change, report report 0 to 15 0 to 12 0 to 12 0 to 10 0 to 10 0 to 10
%C
change in Shore A report report 0 to –8 0 to –7 0 to –7 0 to –6 0 to –6 0 to –6
hardness, rating C
A
Precision of the test method for hydraulic oils at low temperatures is being improved by Subcommittee D02.07.OC, but the test method is applicable.
B
Test Method D 4052 can also be used.
D6158–99
TABLE 2 Requirements for Type HL Mineral Oil Hydraulic Fluids (Rust and Oxidation)
Test Method
Properties ASTM (Other) Parameters Limits
Physical:
ISO-viscosity grade D 2422 10 15 22 32 45 68 100 150
Viscosity D 445 kinematic viscosity at 40°C, cSt 9.0-11.0 13.5-16.5 19.8-24.2 28.8-35.2 41.4-50.6 61.2-74.8 90.0-110 135-165
A
Viscosity,# 750 cP D 2983 temperature, °C, max -33 -23 -15 -8 -2 4 10 16
Viscosity index D 2270 min 90 90 90 90 90 90 90 90
B
Specific gravity D 1298 report report report report report report report report
Appearance visual, at 20°C clear and clear and clear and clear and clear and clear and clear and clear and
bright bright bright bright bright bright bright bright
Flash point D 92 temperature, °C, min 125 145 165 175 185 195 205 215
Pour point D 97 temperature, °C, max -33 -24 -21 -18 -15 -12 -12 -12
Chemical:
Acid Number D 974/D 664 mg KOHg report report report report report report report report
Performance:
C
Rust prevention D 665A visual evaluation pass or fail pass pass pass pass pass pass pass pass
C
D 665B pass pass pass pass pass pass pass pass
Corrosion D 130 copper corrosion, 3 h at 100°C, visual,2 222 2 2 2 2
max
Water separation D 1401 time (mins) to 3 mL emulsion at 54°C, max 30 30 30 30 30 30 - -
time (mins) to 3 mL emulsion at 82°C, max - - - - - - 60 60
Elastomer compatibility D 471 1006 °C/288, 6 2 h SRE-NBR 1
Elastomer
(DIN 53 538, Part 1 or AAMA 524 Part 1)
D
relative volume change, % report report 0 to 15 0 to 12 0 to 12 0 to 10 0 to 10 0 to 10
D
change in Shore A hardness, rating report report 0 to -8 0 to -7 0 to -7 0 to -6 0 to -6 0 to -6
Foam D 892 Sequence I, tendency/stability, mL, max 150/0 150/0 150/0 150/0 150/0 150/0 150/0 150/0
Sequence II, tendency/stability, mL, max 75/0 75/0 75/0 75/0 75/0 75/0 75/0 75/0
Sequence III, tendency/stability, mL, max 150/0 150/0 150/0 150/0 150/0 150/0 150/0 150/0
Air release D 3427 time, (mins. at 50°C, max) 5 5 5 5 10 10 - -
time, (mins. at 75°C, max) - - - - - - report report
Oxidation stability D 943 time for acid number of 2 mg KOH/g, h, 1000 1000 1000 1000 1000 1000 1000 1000
min
Sludge tendency D 4310 total insoluble sludge, mg, max 200 200 200 200 200 200 200 200
copper in oil/water/sludge, mg report report report report report report report report
Thermal stability D 2070 copper appearance, visual max report report report 5 5 5 report report
steel appearance, visual max report report report 1 1 1 report report
sludge, mg/100 mL, max report report report 25 25 25 report report
A
Precision of the test method for hydraulic fuels at low temperatures is being improved by Subcommittee D02.07.OC, but the test method is applicable.
B
Test Method D 4052 can also be used.
C
Test Method D 665 — soak time is 24 h.
D
These numbers are provisional; ASTM is trying to establish a technical consensus for possible revision.

D6158–99
TABLE 3 Requirements for Type HM Mineral Oil Hydraulic Fluids (Anti-wear)
Test Method
Properties ASTM (Other) Parameters Limits
Physical:
ISO-viscosity grade D 2422 10 15 22 32 46 68 100 150
Viscosity D 445 kinematic viscosity at 40°C, cSt 9.0-11.0 13.5-16.5 19.8-24.2 28.8-35.2 41.4-50.6 61.2-74.8 90.0-110 135-165
A
Viscosity# 750 cP D 2983 temperature, °C, max -33 -23 -15 (-8) -2 4 10 16
Viscosity index D 2270 *min 90 90 90 90 90 90 90 90
B
Specific gravity D 1298 report report report report report report report report
Appearance Visual, at 20°C clear and clear and clear and clear and clear and clear and clear and clear and
bright bright bright bright bright bright bright bright
Flash point D 92 temperature, °C, min 125 145 165 175 185 195 205 215
Pour point D 97 temperature, °C, max -33 -24 -21 -18 -15 -12 -12 -12
Chemical:
Acid number D 974/D 664 mg KOH/g, max report report report report report report report report
Performance
C
Rust prevention D 665A visual evaluation, pass or fail pass pass pass pass pass pass pass pass
C
D 665B visual evaluation, pass or fail pass pass pass pass pass pass pass pass
Corrosion D 130 copper corrosion, 3 h at 100°C, visual, 2 2 2 2 2 2 2 2
max
Water separability D 1401 time (mins) to 3 mL emulsion 30 30 30 30 30 30 - -
max at 54°C
time (mins) to 3 mL emulsion - - - - - - 60 60
max at 82°C
Elastomer compatibility D 471 100 6 1°C/288 6 2h
SRE-NBR 1 Elastomer
(DIN53 538, Part 2 or AAMA 524,
Part 2)
D
relative volume change, % report report 0 to 15 0 to 12 0 to 12 0 to 10 0 to 10 0 to 10
D
change in Shore A hardness, rating report report 0 to -8 0 to -7 0 to -7 0 to -6 0 to -6 0 to -6
Foam D 892 Sequence I tendency/stability mL max 150/0 150/0 150/0 150/0 150/0 150/0 150/0 150/0
Sequence II tendency/stability mL max 75/0 75/0 75/0 75/0 75/0 75/0 75/0 75/0
Sequence III tendency/stability mL max 150/0 150/0 150/0 150/0 150/0 150/0 150/0 150/0
Air release D 3427 time (mins) at 50°C, max 5 5 5 5 10 13 - -
time (mins) at 75°C max - - - - - - report report
Oxidation stability D 943 time for acid number of 2 mg 1000 1000 1000 1000 1000 1000 1000 1000
KOH/g, h, min
Sludge tendency D 4310 total insoluble sludge, mg, max 200 200 200 200 200 200 200 200
copper oil/water/sludge, mg report report report report report report report report
Thermal stability D 2070 copper appearance, visual report report report 5 5 5 report report
steel appearance, visual report report report 1 1 1 report report
sludge, mg/100 mL report report report 25 25 25 report report
Wear protection D 2882 weight loss vanes + ring, mg, - - 50 50 50 - - -
max at 65 6°C/100H
weight loss vanes + ring, mg, - - - - - 50 50 50
max at 79 4°C/100H
A
Precision of the test method for hydraulic oils at low temperatures is being improved by Subcommittee D02.07.OC, but the test method is applicable.
B
Test Method D 4052 can also be used.
C
Test Method D 665 — soak time is 24 h.
D
These numbers are provisional; ASTM is trying to establish a technical consensus for possible revision.

D6158–99
TABLE 4 Requirements for Type HV M
...

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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.

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ASTM
ASTM D4898-23(Test Method)
Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis

SIGNIFICANCE AND USE
5.1 This test method indicates and measures the amount of insoluble contamination of hydraulic fluids. Minimizing the levels of insoluble contamination of hydraulic fluids is essential for the satisfactory performance and long life of the equipment. Insoluble contamination can not only plug filters but can damage functional system components resulting in wear and eventual system failure.
SCOPE
1.1 This test method covers the determination of insoluble contamination in hydraulic fluids by gravimetric analysis. The contamination determined includes both particulate and gel-like matter, organic and inorganic, which is retained on a membrane filter disk of pore diameter as required by applicable specifications (usually 0.45 μm or 0.80 μm).  
1.2 To indicate the nature and distribution of the particulate contamination, the gravimetric method should be supplemented by occasional particle counts of typical samples in accordance with Test Method F312.  
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. For a specific warning statement, see 7.1.  
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.

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ASTM
ASTM D6158-23(Specification)
Standard Specification for Mineral Hydraulic Oils

ABSTRACT
This specification covers the standard for mineral oils used in hydraulic systems which require refined base oil (Class HH), refined mineral base oil with rust and oxidation inhibitors (Class HL) or refined mineral base oil with rust and oxidation inhibitors plus antiwear characteristics (Class HM). This specification only covers lubricating oils before they are installed in the hydraulic system and does not include all hydraulic oils. Requirements for the mineral oils shall include, but not limited to, viscosity, specific gravity, appearance, flash point, chemical acid number, corrosion, water separation, elastomer compatibility, air release, and thermal stability.
SCOPE
1.1 This specification covers mineral and synthetic oils of the types API groups I, II, III, and IV used in hydraulic systems, where the performance requirements demand fluids with one of the following characteristics:  
1.1.1 A refined base oil or synthetic base stock (Class HH),  
1.1.2 A refined mineral base oil or synthetic base stock with rust and oxidation inhibitors (Class HL),  
1.1.3 A refined mineral base oil or synthetic base stock with rust and oxidation inhibitors plus anti-wear characteristics (Class HM),  
1.1.4 A refined mineral base oil or synthetic base stock with rust and oxidation inhibitors, anti-wear characteristics, and increased viscosity index higher than 140 (Class HV),  
1.1.5 A refined mineral base oil or synthetic base stock with rust and oxidation inhibitors plus anti-wear characteristics meeting a higher performance level than an HM fluid to address higher demanding hydraulic systems (Class HMHP), and  
1.1.6 A refined mineral base oil with rust or synthetic base stock and oxidation inhibitors, anti-wear characteristics, and increased viscosity index higher than 140 meeting a higher performance level than an HV fluid to address higher demanding hydraulic systems (Class HVHP).  
1.2 This specification defines the requirements of mineral oil-based or synthetic-based hydraulic fluids that are compatible with most existing machinery components when there is adequate maintenance.  
1.3 This specification defines only new lubricating oils before they are installed in the hydraulic system.  
1.4 This specification defines specific types of hydraulic oils. It does not include all hydraulic oils. Some oils that are not included may be satisfactory for certain hydraulic applications. Certain equipment or conditions of use may permit or require a wider or narrower range of characteristics than those described herein.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5.1 Exception—In X1.3.9 on Wear Protection, the values of pump pressure are in MPa, and the psi follows in brackets as a reference point immediately recognized by a large part of the industry.  
1.6 The following safety hazard caveat pertains to the test methods referenced in this specification. 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.  
1.7 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.

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ASTM
ASTM D6006-23(Guide)
Standard Guide for Assessing Biodegradability of Hydraulic Fluids

SIGNIFICANCE AND USE
5.1 This guide discusses ways to assess the likelihood that a hydraulic fluid will undergo biodegradation if it enters an environment that is known to support biodegradation of some substances, for example the material used as the positive control in the test. The information can be used in making or assessing claims of biodegradability of a fluid formula.  
5.2 Biodegradation occurs when a fluid interacts with the environment, and so the extent of biodegradation is a function of both the chemical composition of the hydraulic fluid and the physical, chemical, and biological status of the environment at the time the fluid enters it. This guide cannot assist in judging the status of a particular environment, so it is not meant to provide standards for judging the persistence of a hydraulic fluid in any specific environment either natural or man-made.  
5.3 If any of the tests discussed in this guide gives a high result, it implies that the hydraulic fluid will biodegrade and will not persist in the environmental compartment being considered. If a low result is obtained, it does not mean necessarily that the substance will not biodegrade in the environment, but does mean that further testing is required if a claim of biodegradability is to be made. Such testing may include, but is not limited to, other tests mentioned in this guide or simulation tests for a particular environmental compartment.
SCOPE
1.1 This guide covers and provides information to assist in planning a laboratory test or series of tests from which may be inferred information about the biodegradability of an unused fully formulated hydraulic fluid in its original form. Biodegradability is one of three characteristics which are assessed when judging the environmental impact of a hydraulic fluid. The other two characteristics are ecotoxicity and bioaccumulation.  
1.2 Biodegradability may be considered by type of environmental compartment: aerobic fresh water, aerobic marine, aerobic soil, and anaerobic media. Test methods for aerobic fresh water, aerobic soil and anaerobic media have been developed that are appropriate for the concerns and needs of testing in each compartment.  
1.3 This guide addresses releases to the environment that are incidental to the use of a hydraulic fluid but is not intended to cover situations of major, accidental release. The tests discussed in this guide take a minimum of three to four weeks. Therefore, issues relating to the biodegradability of hydraulic fluid are more effectively addressed before the fluid is used, and thus before incidental release may occur. Nothing in this guide should be taken to relieve the user of the responsibility to properly use and dispose of hydraulic fluids.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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.

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ASTM
ASTM D7646-23(Test Method)
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.

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