ASTM B26/B26M-12
(Specification)Standard Specification for Aluminum-Alloy Sand Castings
Standard Specification for Aluminum-Alloy Sand Castings
ABSTRACT
This specification covers aluminum alloy sand castings except those that are for aerospace applications. The chemical compositions are determined in accordance with the specified suitable chemical and spectrochemical test methods. Addition of small amounts of modifiers and grain refining elements to the molten alloys from the remelting furnace is permitted before casting. Pure metals, recycled materials, and master alloys can also be used to make the alloys as long as the chemical composition can be analyzed and adjusted to conform to the requirements prior to pouring any casting. Castings should only be repaired using approved processes such as welding, impregnation, peening, blending, soldering, and so forth.
SCOPE
1.1 This specification covers aluminum-alloy sand castings designated as shown in Table 1.
1.2 This specification is for aluminum-alloy sand castings used in general purpose applications. It may not address the mechanical properties, integrity testing, and verification required for highly loaded or safety critical applications.
1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1M. Unified Numbering System alloy designations are in accordance with Practice E527.
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 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.
TABLE 1 Chemical Composition Limits
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 determining conformance to these limits, an observed value or a calculated value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding method of Practice E29. Alloy AluminumComposition, (Values in Weight Percent)Others ANSIUNSSiliconIronCopperMan-
ganese Magne-
siumChromiumNickelZincTinTitaniumEachTotal 201.0 A02010remainder0.100.154.0–5.2 0.20–0.500.15–0.55... .........0.15–0.350.05A0.10 204.0 A02040remainder0.200.354.2–5.0 0.100.15–0.35... 0.050.10 0.050.15–0.300.05 0.15 242.0 A02420remainder0.71.03.7–4.5 0.351.2–1.80.25 1.7–2.30.35 ...0.250.05 0.15 A242.0 A12420remainder0.60.83.7–4.5 0.101.2–1.70.15–0.251.8–2.30.10 ... 0.07–0.200.05 0.15 295.0 A02950remainder0.7–1.5 1.04.0–5.00.350.03......0.35 ...0.250.050.15 319.0 A03190remainder5.5–6.5 1.03.0–4.00.500.10...0.351.0 ...0.25...0.50 328.0 A03280remainder7.5–8.5 1.01.0–2.00.20–0.60.20–0.60.35 0.251.5...0.25...0.50 355.0 A03550remainder4.5–5.5 0.6B1.0–1.50.50B0.40–0.60.25... 0.35...0.25 0.050.15 C355.0 A33550remainder4.5–5.5 0.201.0–1.50.100.40–0.6... ...0.10...0.200.05 0.15 356.0 A03560remainder6.5–7.5 0.6B0.250.35B0.20–0.45...... 0.35...0.250.050.15 A356.0 A13560remainder6.5–7.5 0.200.20 0.100.25–0.45... ...0.10 ...0.200.05 0.15 443.0 A04430remainder4.5–6.0 0.80.6 0.500.050.25...0.50 ...0.25 ...0.35 B443.0 A24430remainder4.5–6.0 0.80.15 0.350.05......0.35 ...0.25 0.050.15 512.0 A05120remainder1.4–2.2 0.60.35 0.83.5–4.50.25 ...0.35...0.25 0.05 0.15 514.0 A05140remainder0.350....
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Designation:B26/B26M −12
StandardSpecification for
1
Aluminum-Alloy Sand Castings
This standard is issued under the fixed designation B26/B26M; 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.
3
1. Scope* 2.2 ASTM Standards:
2 B179 Specification for Aluminum Alloys in Ingot and Mol-
1.1 This specification covers aluminum-alloy sand castings
ten Forms for Castings from All Casting Processes
designated as shown in Table 1.
B275 Practice for Codification of Certain Nonferrous Metals
1.2 This specification is for aluminum-alloy sand castings
and Alloys, Cast and Wrought
used in general purpose applications. It may not address the
B557 Test Methods for Tension Testing Wrought and Cast
mechanical properties, integrity testing, and verification re-
Aluminum- and Magnesium-Alloy Products
quired for highly loaded or safety critical applications.
B557M Test Methods for Tension Testing Wrought and Cast
1.3 Alloy and temper designations are in accordance with Aluminum- and Magnesium-Alloy Products (Metric)
B660 Practices for Packaging/Packing of Aluminum and
ANSI H35.1/H35.1M. Unified Numbering System alloy des-
ignations are in accordance with Practice E527. Magnesium Products
B881 Terminology Relating toAluminum- and Magnesium-
1.4 Unless the order specifies the “M” specification
Alloy Products
designation, the material shall be furnished to the inch-pound
B917/B917M Practice for Heat Treatment of Aluminum-
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
E34 Test Methods for Chemical Analysis of Aluminum and
1.6 The values stated in either SI units or inch-pound units
Aluminum-Base Alloys
are to be regarded separately as standard. The values stated in
E94 Guide for Radiographic Examination
each system may not be exact equivalents; therefore, each
E155 Reference Radiographs for Inspection of Aluminum
system shall be used independently of the other. Combining
and Magnesium Castings
values from the two systems may result in nonconformance
E165 Practice for Liquid Penetrant Examination for General
with the standard.
Industry
1.7 This standard does not purport to address all of the
E527 Practice for Numbering Metals and Alloys in the
safety concerns, if any, associated with its use. It is the
Unified Numbering System (UNS)
responsibility of the user of this standard to establish appro-
E607 Test Method for Atomic Emission Spectrometric
priate safety and health practices and determine the applica-
Analysis Aluminum Alloys by the Point to Plane Tech-
bility of regulatory limitations prior to use.
4
nique Nitrogen Atmosphere (Withdrawn 2011)
E716 Practices for Sampling and Sample Preparation of
2. Referenced Documents
Aluminum and Aluminum Alloys for Determination of
2.1 The following documents of the issue in effect on date
Chemical Composition by Spectrochemical Analysis
of material purchase form a part of this specification to the
E1251 Test Method for Analysis of Aluminum and Alumi-
extent referenced herein:
num Alloys by Spark Atomic Emission Spectrometry
E2422 Digital Reference Images for Inspection of Alumi-
num Castings
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
3
Aluminum Alloy Ingots and Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2012. Published June 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1918. Last previous edition approved in 2011 as B26/B26M – 11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0026_B0026M-12. the ASTM website.
2
4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- The last approved version of this historical standard is referenced on
cation SB-26/SB-26M in Section II of that Code. www.astm.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 ----------------------
B26/B26M−12
TABLE 1 Chemical Composition Limits
NOTE 1—When single units are shown, these indicate the m
...
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:B26/B26M–11 Designation: B26/B26M – 12
Standard Specification for
1
Aluminum-Alloy Sand Castings
This standard is issued under the fixed designation B26/B26M; 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*
2
1.1 This specification covers aluminum-alloy sand castings designated as shown in Table 1.
1.2This specification is not intended for aluminum-alloy sand castings used in aerospace applications.
1.2 This specification is for aluminum-alloy sand castings used in general purpose applications. It may not address the
mechanical properties, integrity testing, and verification required for highly loaded or safety critical applications.
1.3 Alloy and temper designations are in accordance withANSI H35.1/H35.1M. Unified Numbering System alloy designations
are in accordance with Practice E527.
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 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 date of material purchase form a part of this specification to the extent
referenced herein:
3
2.2 ASTM Standards:
B179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes
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)
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
D3951 Practice for Commercial Packaging
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E94 Guide for Radiographic Examination
E155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings
E165 Practice for Liquid Penetrant Examination for General Industry
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E607 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 Dec.May 1, 2011.2012. Published December 2011.June 2012. Originally approved in 1918. Last previous edition approved in 20092011 as
B26/B26M–09.B26/B26M – 11. DOI: 10.1520/B0026_B0026M-112.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SB-26/SB-26M in Section II of that Code.
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.
*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 ----------------------
B26/B26M – 12
TABLE 1 Chemical Composition Limits
NOTE 1—When single units are shown, these indicate the ma
...
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