ASTM B618/B618M-08
(Specification)Standard Specification for Aluminum-Alloy Investment Castings
Standard Specification for Aluminum-Alloy Investment Castings
ABSTRACT
This specification covers aluminum-alloy investment castings. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. The castings shall conform to the chemical composition requirements specified. The determination of chemical composition shall be made in accordance with suitable chemical (Test Methods E 34), or spectrochemical (Test Methods E 607 and E 1251) methods. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. Foundry control shall consist of examination of castings by radiographic or other approved methods for determining internal discontinuities until the gating, pouring, and other foundry practices have been established to produce castings meeting the required quality standards. The tensile properties shall be determined in accordance with Test Methods B 557 and B 557M. Heat treatment of castings shall be performed in accordance with Practice B 917/B 917M.
SCOPE
1.1 This specification covers aluminum-alloy investment castings designated as shown in Table 1.
1.2 This specification is not intended for aluminum-alloy investment castings used in aerospace applications.
1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System alloy designations are in accordance with Practice E 527.
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.
1.6 Units—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 nonconformance with the standard.
1.7 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: B618/B618M – 08
Standard Specification for
1
Aluminum-Alloy Investment Castings
This standard is issued under the fixed designation B618/B618M; 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 Department of Defense.
1. Scope* B275 Practice for Codification of Certain Nonferrous Met-
als and Alloys, Cast and Wrought
1.1 This specification covers aluminum-alloy investment
B557 Test Methods for Tension Testing Wrought and Cast
castings designated as shown in Table 1.
Aluminum- and Magnesium-Alloy Products
1.2 This specification is not intended for aluminum-alloy
B557M TestMethodsforTensionTestingWroughtandCast
investment castings used in aerospace applications.
Aluminum- and Magnesium-Alloy Products (Metric)
1.3 Alloy and temper designations are in accordance with
B660 Practices for Packaging/Packing of Aluminum and
ANSI H35.1/H35.1 (M). The equivalent Unified Numbering
Magnesium Products
System alloy designations are in accordance with Practice
B881 TerminologyRelatingtoAluminum-andMagnesium-
E527.
Alloy Products
1.4 Unless the order specifies the “M” specification desig-
B917/B917M Practice for Heat Treatment of Aluminum-
nation, the material shall be furnished to the inch-pound units.
Alloy Castings from All Processes
1.5 For acceptance criteria for inclusion of new aluminum
D3951 Practice for Commercial Packaging
and aluminum alloys and their properties in this specification,
E29 Practice for Using Significant Digits in Test Data to
see Annex A1 and Annex A2.
Determine Conformance with Specifications
1.6 Units—The values stated in either SI units or inch-
E34 Test Methods for ChemicalAnalysis ofAluminum and
pound units are to be regarded separately as standard. The
Aluminum-Base Alloys
values stated in each system may not be exact equivalents;
E94 Guide for Radiographic Examination
therefore,eachsystemshallbeusedindependentlyoftheother.
E155 Reference Radiographs for Inspection of Aluminum
Combining values from the two systems may result in noncon-
and Magnesium Castings
formance with the standard.
E165 PracticeforLiquidPenetrantExaminationforGeneral
1.7 This standard does not purport to address all of the
Industry
safety concerns, if any, associated with its use. It is the
E527 Practice for Numbering Metals and Alloys in the
responsibility of the user of this standard to establish appro-
Unified Numbering System (UNS)
priate safety and health practices and determine the applica-
E607 Test Method for Atomic Emission Spectrometric
bility of regulatory limitations prior to use.
Analysis Aluminum Alloys by the Point to Plane Tech-
2. Referenced Documents nique Nitrogen Atmosphere
E716 Practices for Sampling Aluminum and Aluminum
2.1 The following documents of the issue in effect on the
Alloys for Spectrochemical Analysis
date of purchase form a part of this specification to the extent
E1251 Test Method for Analysis of Aluminum and Alumi-
referenced herein:
2
num Alloys by Atomic Emission Spectrometry
2.2 ASTM Standards:
IEEE/ASTM SI 10 Standard for Use of the International
B179 Specification for Aluminum Alloys in Ingot and
System of Units (SI): The Modern Metric System
Molten Forms for Castings from All Casting Processes
3
2.3 ANSI Standard:
H35.1/H35.1 (M) - 2006 American National StandardAlloy
and Temper Designation Systems for Aluminum
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
4
2.4 Military Standards:
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
Aluminum Alloy Ingots and Castings.
CurrenteditionapprovedJune1,2008.PublishedJuly2008.Originallyapproved
in 1977. Last previous edition approved in 2007 as B618/B618M – 07. DOI:
3
10.1520/B0618_B0618M-08. Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Arlington, VA 22209, http://www.aluminum.org.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
*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.
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B618/B618M – 08
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TABLE 1 Chemical Composition Requirements
NOTE 1—When s
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:B618/B618M–07 Designation: B 618/B 618M – 08
Standard Specification for
1
Aluminum-Alloy Investment Castings
This standard is issued under the fixed designation B 618/B 618M; 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 Department of Defense.
1. Scope*
1.1 This specification covers aluminum-alloy investment castings designated as shown in Table 1.
1.2 This specification is not intended for aluminum-alloy investment castings used in aerospace applications.
1.3 Alloy and temper designations are in accordance withANSI H35.1/H35.1 (M). The equivalent Unified Numbering System
alloy designations are in accordance with Practice E 527.
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see
Annex A1 and Annex A2.
1.6 Units—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 nonconformance with the standard.
1.7 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 purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B 179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes
B 275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought
B 557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B 557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
B 660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B 881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B 917/B 917M Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
D 3951 Practice for Commercial Packaging
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E 34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys E88Practice for Sampling Nonferrous
Metals and Alloys in Cast Form for
Determination of Chemical Composi-
tion
E 94 Guide for Radiographic Examination
E 155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings
E 165 Test Method for Liquid Penetrant Examination
E 527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E 607 Test Method for Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point to Plane Technique Nitrogen
Atmosphere
1
This specification is under the jurisdiction ofASTM Committee B07 on Light Metals andAlloys and is the direct responsibility of Subcommittee B07.01 onAluminum
Alloy Ingots and Castings.
Current edition approved Oct.June 1, 2007.2008. Published November 2007.July 2008. Originally approved in 1977. Last previous edition approved in 20062007 as
B 618/B 618M – 067.
2
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.
*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 ----------------------
B 618/B 618M – 08
2
TABLE 1 Chemical Composition Requirements
NOTE 1—When single units are shown, these indicate the maximum amounts permitted.
NOTE 2—Analysis shall be made for the elements for which limits are shown in this table.
NOTE 3—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an obse
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