ASTM B918/B918M-17a
(Practice)Standard Practice for Heat Treatment of Wrought Aluminum Alloys
Standard Practice for Heat Treatment of Wrought Aluminum Alloys
ABSTRACT
This practice is intended for use in the heat treatment of wrought aluminum alloys for general purpose applications. Aluminum alloys are typically heated in air chamber furnaces or molten salt baths. Though lead baths, oil baths, or fluidized beds may be used, uncontrolled heating is not permitted. The furnace temperature uniformity and calibration shall conform to the specified requirements. Preparation for heat treatment of alloys shall follow the racking, spacing, and cleanliness requirements. Solution heat treatment shall follow the recommended soaking times and quenching procedures. Precipitation heat treatment shall conform to the prescribed times, temperatures, and annealing procedures. The alloys shall be subjected to tensile testing, eutectic melting and heat-treat-induced porosity analysis, intergranular corrosion test, and Alclad diffusion test.
SCOPE
1.1 This practice is intended for use in the heat treatment of wrought aluminum alloys for general purpose applications.
1.1.1 The heat treatment of wrought aluminum alloys used in specific aerospace applications is covered in AMS 2772.2
1.1.2 Heat treatment of aluminum alloy castings for general purpose applications is covered in Practice B917/B917M.
1.2 Times and temperatures appearing in the heat-treatment tables are typical for various forms, sizes, and manufacturing methods and may not provide the optimum heat treatment for a specific item.
1.3 Some alloys in the 6xxx series may achieve the T4 temper by quenching from within the solution temperature range during or immediately following a hot working process, such as upon emerging from an extrusion die. Such alternatives to furnace heating and immersion quenching are indicated in Table 2, by Footnote L, for heat treatment of wrought aluminum alloys. However, this practice does not cover the requirements for a controlled extrusion press or hot rolling mill solution heat treatment. (Refer to Practice B807 for extrusion press solution heat treatment of aluminum alloys and to Practice B947 for hot rolling mill solution heat treatment of aluminum alloys.)3
1.4 Units—The values stated in either Metric or US Customary units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 and health 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.
General Information
Relations
Buy Standard
Standards Content (Sample)
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
Designation: B918/B918M − 17a
Standard Practice for
1
Heat Treatment of Wrought Aluminum Alloys
This standard is issued under the fixed designation B918/B918M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This practice is intended for use in the heat treatment of
responsibility of the user of this standard to establish appro-
wrought aluminum alloys for general purpose applications.
priate safety and health practices and determine the applica-
1.1.1 The heat treatment of wrought aluminum alloys used
bility of regulatory limitations prior to use.
2
in specific aerospace applications is covered in AMS 2772.
1.6 This international standard was developed in accor-
1.1.2 Heat treatment of aluminum alloy castings for general
dance with internationally recognized principles on standard-
purpose applications is covered in Practice B917/B917M.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.2 Times and temperatures appearing in the heat-treatment
mendations issued by the World Trade Organization Technical
tables are typical for various forms, sizes, and manufacturing
Barriers to Trade (TBT) Committee.
methods and may not provide the optimum heat treatment for
a specific item.
2. Referenced Documents
1.3 Some alloys in the 6xxx series may achieve the T4
2.1 The following documents, of the issue in effect on the
temper by quenching from within the solution temperature
date of material purchase, form a part of this specification to
range during or immediately following a hot working process,
the extent referenced herein:
suchasuponemergingfromanextrusiondie.Suchalternatives
3
to furnace heating and immersion quenching are indicated in
2.2 ASTM Standards:
Table 2, by Footnote L, for heat treatment of wrought alumi-
B557Test Methods for Tension Testing Wrought and Cast
num alloys. However, this practice does not cover the require-
Aluminum- and Magnesium-Alloy Products
ments for a controlled extrusion press or hot rolling mill
B557MTest Methods forTensionTestingWrought and Cast
solution heat treatment. (Refer to Practice B807 for extrusion
Aluminum- and Magnesium-Alloy Products (Metric)
press solution heat treatment of aluminum alloys and to
B881Terminology Relating toAluminum- and Magnesium-
Practice B947 for hot rolling mill solution heat treatment of
Alloy Products
3
aluminum alloys.)
B917/B917MPractice for Heat Treatment of Aluminum-
Alloy Castings from All Processes
1.4 Units—The values stated in either Metric or US Cus-
G69Test Method for Measurement of Corrosion Potentials
tomary units are to be regarded separately as standard. The
of Aluminum Alloys
values stated in each system may not be exact equivalents;
therefore,eachsystemshallbeusedindependentlyoftheother. 2.3 American National Standard:
Combining values from the two systems may result in non-
H35.1/H35.1(M)AlloyandTemperDesignationSystemsfor
4
conformance with the standard. Aluminum
3. Terminology
1
This practice is under the jurisdiction of ASTM Committee B07 on Light
3.1 Definitions—Refer to Terminology B881 for definitions
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
of product terms used in this practice.
Aluminum Alloy Wrought Products.
Current edition approved Aug. 1, 2017. Published August 2017. Originally
3.2 Definition of Pyrometry Terms Specific to This Standard:
approved in 2001. Last previous edition approved in 2017 as B918/B918M–17.
3.2.1 control sensor, n—sensor connected to the furnace
DOI: 10.1520/B0918_B0918M-17A.
temperature controller, which may or may not be recording.
2
Available from SAE International, 400 Commonwealth Dr., Warrendale, PA
15096-0001, http://www.sae.org.
3
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
4
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
---------------------- Page: 1 ----------------------
B918/B918M − 17a
TABLE 1 Tests Required
A
...
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: B918/B918M − 17 B918/B918M − 17a
Standard Practice for
1
Heat Treatment of Wrought Aluminum Alloys
This standard is issued under the fixed designation B918/B918M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This practice is intended for use in the heat treatment of wrought aluminum alloys for general purpose applications.
2
1.1.1 The heat treatment of wrought aluminum alloys used in specific aerospace applications is covered in AMS 2772.
1.1.2 Heat treatment of aluminum alloy castings for general purpose applications is covered in Practice B917/B917M.
1.2 Times and temperatures appearing in the heat-treatment tables are typical for various forms, sizes, and manufacturing
methods and may not provide the optimum heat treatment for a specific item.
1.3 Some alloys in the 6xxx series may achieve the T4 temper by quenching from within the solution temperature range during
or immediately following a hot working process, such as upon emerging from an extrusion die. Such alternatives to furnace heating
and immersion quenching are indicated in Table 2, by Footnote L, for heat treatment of wrought aluminum alloys. However, this
practice does not cover the requirements for a controlled extrusion press or hot rolling mill solution heat treatment. (Refer to
Practice B807 for extrusion press solution heat treatment of aluminum alloys and to Practice B947 for hot rolling mill solution heat
3
treatment of aluminum alloys.)
1.4 Units—The values stated in either SI units or inch-pound Metric or US Customary units are to be regarded separately as
standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of
the other. Combining values from the two systems may result in non-conformance with the 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 and health 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.
2. Referenced Documents
2.1 The following documents, of the issue in effect on the date of material purchase, form a part of this specification to the extent
referenced herein:
3
2.2 ASTM Standards:
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
G69 Test Method for Measurement of Corrosion Potentials of Aluminum Alloys
2.3 American National Standard:
4
H35.1/H35.1(M) Alloy and Temper Designation Systems for Aluminum
1
This practice is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on Aluminum Alloy
Wrought Products.
Current edition approved May 1, 2017Aug. 1, 2017. Published May 2017August 2017. Originally approved in 2001. Last previous edition approved in 20092017 as
B918/B918M – 09.B918/B918M – 17. DOI: 10.1520/B0918_B0918M-17. 10.1520/B0918_B0918M-17A.
2
Available from SAE International, 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
3
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.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.