ASTM B955/B955M-18
(Specification)Standard Specification for Aluminum-Alloy Centrifugal Castings
Standard Specification for Aluminum-Alloy Centrifugal Castings
ABSTRACT
This specification covers the standard for aluminum-alloy centrifugal castings. This specification does not cover aluminum-alloy centrifugal castings used in aerospace applications. The castings shall be in accordance to the prescribed chemical composition. Chemical composition shall be determined by analyzing samples at the time the castings are poured, or samples taken from castings or tension test specimens. Unless otherwise stated, the tensile strength, yield strength and elongation of test specimens cut from casting shall be in accordance with the standards prescribed herein. If the specimens fail to conform to tension requirements, test bars representative of the castings may be retested in accordance with the replacement tests and retest provisions.
SCOPE
1.1 This specification covers aluminum-alloy centrifugal castings designated as shown in Table 1. (A) When single units are shown, these indicate the maximum amounts permitted.(B) Analysis shall be made for the elements for which limits are shown in this table.(C) 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.(D) In case of discrepancy between the values listed in Table 1 and those listed in the “Designations and Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (known as the ‘Pink Sheets’),” the composition limits registered with the Aluminum Association and published in the “Pink Sheets” shall be considered the controlling composition.(E) “Others” includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic “Others” elements. Should any analysis by the producer or the purchaser establish that an “Others” element exceeds the limit of “Each” or that the aggregate of several “Others” elements exceeds the limit of “Total,” the material shall be considered nonconforming.(F) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.(G) If the iron content exceeds 0.45 %, manganese content shall not be less than one half of the iron.(H) For a cross reference of current and former alloy designations see the Aluminum Association’s “Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (‘The Pink Sheets’).”
1.2 This specification is for aluminum-alloy centrifugal 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/H35.1 (M).
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 non-conformance 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, health, and environmental practices and determine the applicability of regulatory limita...
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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.
Designation: B955/B955M −18
Standard Specification for
1
Aluminum-Alloy Centrifugal Castings
This standard is issued under the fixed designation B955/B955M; 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* 2. Referenced Documents
2.1 The following documents of the issue in effect on the
1.1 This specification covers aluminum-alloy centrifugal
castings designated as shown in Table 1. date of casting purchase form a part of this specification to the
extent referenced herein:
1.2 This specification is for aluminum-alloy centrifugal
2
castings used in general purpose applications. It may not 2.2 ASTM Standards:
B179 Specification for Aluminum Alloys in Ingot and Mol-
address the mechanical properties, integrity testing, and veri-
ten Forms for Castings from All Casting Processes
fication required for highly loaded or safety critical applica-
B275 PracticeforCodificationofCertainZinc,TinandLead
tions.
3
Die Castings (Withdrawn 2020)
1.3 Alloy and temper designations are in accordance with
B557 Test Methods for Tension Testing Wrought and Cast
ANSI H35.1/H35.1 (M).
Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast
1.4 Unless the order specifies the “M” specification
Aluminum- and Magnesium-Alloy Products (Metric)
designation, the material shall be furnished to the inch-pound
B660 Practices for Packaging/Packing of Aluminum and
units.
Magnesium Products
1.5 For acceptance criteria for inclusion of new aluminum
B666/B666M Practice for Identification Marking of Alumi-
and aluminum alloys and their properties in this specification,
num and Magnesium Products
see Annex A1 and Annex A2.
B881 Terminology Relating toAluminum- and Magnesium-
Alloy Products
1.6 Units—The values stated in either SI units or inch-
B917/B917M Practice for Heat Treatment of Aluminum-
pound units are to be regarded separately as standard. The
Alloy Castings From All Processes
values stated in each system may not be exact equivalents;
B985 Practice for SamplingAluminum Ingots, Billets, Cast-
therefore,eachsystemshallbeusedindependentlyoftheother.
ings and Finished or Semi-Finished Wrought Aluminum
Combining values from the two systems may result in non-
Products for Compositional Analysis
conformance with the standard.
D3951 Practice for Commercial Packaging
1.7 This standard does not purport to address all of the
E29 Practice for Using Significant Digits in Test Data to
safety concerns, if any, associated with its use. It is the
Determine Conformance with Specifications
responsibility of the user of this standard to establish appro-
E34 Test Methods for Chemical Analysis of Aluminum and
3
priate safety, health, and environmental practices and deter-
Aluminum-Base Alloys (Withdrawn 2017)
mine the applicability of regulatory limitations prior to use.
E94 Guide for Radiographic Examination Using Industrial
1.8 This international standard was developed in accor- Radiographic Film
dance with internationally recognized principles on standard-
E155 Reference Radiographs for Inspection of Aluminum
ization established in the Decision on Principles for the and Magnesium Castings
Development of International Standards, Guides and Recom- E165 Practice for Liquid Penetrant Testing for General
mendations issued by the World Trade Organization Technical Industry
Barriers to Trade (TBT) Committee. E607 Test Method for Atomic Emission Spectrometric
1 2
This specification is under the jurisdiction of ASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloysand is the direct responsibility of Subcommittee B07.01 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Ingots and Castings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2018. Published June 2018. Originally the ASTM website.
3
approved in 2007. Last previous edition approved in 2014 as B955/B955M – 14. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0955_B0955M-18. 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 ----------------------
B955/B955M − 18
A,B,C,D
TABLE 1 Chemical Composition Limits
E
Others
H
Desig. Si Fe Cu
...
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: B955/B955M − 14 B955/B955M − 18
Standard Specification for
1
Aluminum-Alloy Centrifugal Castings
This standard is issued under the fixed designation B955/B955M; 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*
1.1 This specification covers aluminum-alloy centrifugal castings designated as shown in Table 1.
1.2 This specification is not intended for aluminum-alloy centrifugal castings used in aerospace applications.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/H35.1 (M). The equivalent 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 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 non-conformance 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitationlimitations prior to use.
1.8 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 casting purchase form a part of this specification to the extent
referenced herein:
2
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 Zinc, Tin and Lead Die Castings
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
B666/B666M Practice for Identification Marking 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
B985 Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for
Compositional Analysis
D3951 Practice for Commercial Packaging
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
1
This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloysand is the direct responsibility of Subcommittee B07.01 on Aluminum
Alloy Ingots and Castings.
Current edition approved Oct. 1, 2014May 15, 2018. Published October 2014June 2018. Originally approved in 2007. Last previous edition approved in 20112014 as
B955/B955M – 11.B955/B955M – 14. DOI: 10.1520/B0955_B0955M-14. 10.1520/B0955_B0955M-18.
2
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.
*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 ----------------------
B955/B955M − 18
A,B,C,D
TABLE 1 Chemical Composition Limits
Alloy Composition, %
E
Manga-
Other Elements
D
ANSI UNS Silicon Iron Copper MagnesiumChromium Nickel Zinc Titanium Tin Aluminum
nese
H E
...
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