ASTM B917/B917M-09
(Practice)Standard Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
Standard Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
ABSTRACT
This practice covers the requirements for the heat treatment of aluminum alloy castings from any casting process such as investment casting, permanent mould casting, sand casting, and others. It excludes castings that are used in specific aerospace applications or those made from wrought aluminum alloys. The aluminum alloys should be subjected to controlled heat treatment using the usual air chamber furnace or other heating media like lead baths, oil baths, fluidized beds, or even superheated steam. Air chambers may be oil or gas fired or may also be electrically heated but the atmosphere inside each should be controlled to prevent porosity. Quenching is normally performed by immersing castings in a hot-water bath. It is important that the furnace be calibrated before it is used initially and after any change in the furnace. Likewise, temperature-measurement systems should be regularly checked for accuracy.
SCOPE
1.1 This practice covers, when specified by material specification or purchase order, the heat treatment of aluminum alloy castings from all casting processes.
1.1.1 The heat treatment of aluminum alloy castings used in specific aerospace applications is covered in AMS 2771 and specific AMS material specifications.
1.1.2 The heat treatment of wrought aluminum alloys is covered in Practice B918.
1.2 The values stated in either SI units or inch-pound 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.
1.2.1 SI Units—The SI units are shown in brackets or in separate tables.
1.3 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.
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Designation:B917/B917M–09
Standard Practice for
Heat Treatment of Aluminum-Alloy Castings from All
1
Processes
This standard is issued under the fixed designation B917/B917M; 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* B108 Specification for Aluminum-Alloy Permanent Mold
Castings
1.1 This practice covers, when specified by material speci-
B275 Practice for Codification of Certain Nonferrous Met-
fication or purchase order, the heat treatment of aluminum
als and Alloys, Cast and Wrought
alloy castings from all casting processes.
B557 Test Methods for Tension Testing Wrought and Cast
1.1.1 The heat treatment of aluminum alloy castings used in
2 Aluminum- and Magnesium-Alloy Products
specific aerospace applications is covered in AMS 2771 and
2
B557M TestMethodsforTensionTestingWroughtandCast
specific AMS material specifications.
Aluminum- and Magnesium-Alloy Products (Metric)
1.1.2 The heat treatment of wrought aluminum alloys is
B618 Specification for Aluminum-Alloy Investment Cast-
covered in Practice B918.
ings
1.2 The values stated in either SI units or inch-pound units
B686 Specification for Aluminum Alloy Castings, High-
are to be regarded separately as standard. The values stated in
Strength
each system may not be exact equivalents; therefore, each
B881 TerminologyRelatingtoAluminum-andMagnesium-
system shall be used independently of the other. Combining
Alloy Products
values from the two systems may result in non-conformance
B918 Practice for Heat Treatment of Wrought Aluminum
with the standard.
Alloys
1.2.1 SI Units—The SI units are shown in brackets or in
G110 Practice for Evaluating Intergranular Corrosion Re-
separate tables.
sistanceofHeatTreatableAluminumAlloysbyImmersion
1.3 This standard does not purport to address all of the
in Sodium Chloride + Hydrogen Peroxide Solution
safety concerns, if any, associated with its use. It is the
2.3 ANSI Standard:
responsibility of the user of this standard to establish appro-
H35.1 Alloy and Temper Designation Systems for Alumi-
priate safety and health practices and determine the applica-
4
num
bility of regulatory limitations prior to use.
2.4 SAE Standard:
2. Referenced Documents
AMS 2771 Heat Treatment of Aluminum Alloy Castings
2.1 The following documents of the issue in effect on the
3. Terminology
dateofmaterialpurchaseformapartofthisspecificationtothe
3.1 Definitions:
extent referenced herein:
3 3.1.1 RefertoTerminologyB881forterminologyrelatingto
2.2 ASTM Standards:
the heat treatment of castings.
B26/B26M Specification for Aluminum-Alloy Sand Cast-
ings
4. Equipment
4.1 Heating Media—Aluminum castings are typically heat
1
This practice is under the jurisdiction of ASTM Committee B07 on Light
treated in air chamber furnaces; however, lead baths, oil baths,
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
fluidized beds, or even superheated steam may be used in
Aluminum Alloy Ingots and Castings.
specific applications. The use of uncontrolled heating is not
Current edition approved Nov. 1, 2009. Published December 2009. Originally
approved in 2001. Last previous edition approved in 2008 as B917/B917M – 08.
permitted. Whichever heating means are employed, careful
DOI: 10.1520/B0917_B0917M-09.
evaluation is required to ensure that the casting responds
2
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
properly to heat treatment and is not overheated or damaged by
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 from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,
the ASTM website. Arlington, VA 22209, http://www.aluminum.org.
*ASummary 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 ----------------------
B917/B917M–09
the heat treatment environment. Salt baths are not recom- 5.1.2 Working instruments shall be calibrated at least once
mended for the commercial heat treatment of aluminum every three months against a test instrument that is traceable to
castings in volume. (Warning—Nitrate baths must not be used NIST. Accuracy shall be 6 \0.3 % of range.
in the heat treatment of 5xx.0 series castings because of the
5.2 Furnace Temperature Survey:
inherent explosion hazard.
5.2.1 A tempera
...
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:B917/B917M–08 Designation: B917/B917M – 09
Standard Practice for
Heat Treatment of Aluminum-Alloy Castings from All
1
Processes
This standard is issued under the fixed designation B917/B917M; 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.
Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval. Note—Table 1 and section 7.1 updated and
the year date was changed on Aug. 7, 2008.
1. Scope*
1.1 This practice covers, when specified by material specification or purchase order, the heat treatment of aluminum alloy
castings from all casting processes.
2
1.1.1 The heat treatment of aluminum alloy castings used in specific aerospace applications is covered in AMS 2771 and
2
specific AMS material specifications.
1.1.2 The heat treatment of wrought aluminum alloys is covered in Practice B918.
1.2The values stated in either inch-pound units or SI units are to be regarded separately as standards. The SI units are shown
in brackets or in separate tables. The values stated in each system are not exact equivalents, therefore each system must be used
independent of the other. Combining values from the two systems may result in non-conformance with the practice.
1.2 The values stated in either SI units or inch-pound 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.
1.2.1 SI Units—The SI units are shown in brackets or in separate tables.
1.3 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.
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:
B26/B26M Specification for Aluminum-Alloy Sand Castings
B108 Specification for Aluminum-Alloy Permanent Mold Castings
B275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought
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)
B618 Specification for Aluminum-Alloy Investment Castings
B686 Specification for Aluminum Alloy Castings, High-Strength
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B918 Practice for Heat Treatment of Wrought Aluminum Alloys
G110 Practice for Evaluating Intergranular Corrosion Resistance of Heat TreatableAluminumAlloys by Immersion in Sodium
Chloride + Hydrogen Peroxide Solution
2.3 ANSI Standard:
1
This practice is under the jurisdiction ofASTM Committee B07 on Light Metals andAlloys and is the direct responsibility of Subcommittee B07.01 onAluminumAlloy
Ingots and Castings.
Current edition approved Aug. 7, 2008. Published August 2008. Originally approved in 2001. Last previous edition approved in 2007 as B917/B917M–2007. DOI:
10.1520/B0917_B0917M-08.
Current edition approved Nov. 1, 2009. Published December 2009. Originally approved in 2001. Last previous edition approved in 2008 as B917/B917M – 08. DOI:
10.1520/B0917_B0917M-09.
2
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
*ASummary 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 ----------------------
B917/B917M – 09
4
H35.1 Alloy and Temper Designation Systems for Aluminum
2.4 SAE Standard:
AMS 2771 Heat Treatment of Aluminum Alloy Castings
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology B881 for terminology relating to the heat treatment of castings.
4. Equipment
4.1 Heating Media—Aluminum castings are typically heat treat
...
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