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ASTM B951-11

(Practice)

Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought

Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought

ABSTRACT
This practice provides a system for the codification of unalloyed magnesium and magnesium alloys in the cast and wrought forms. Code designations shall be based on their chemical composition limits. For alloys, designations shall consist of not more than two letters representing the alloying elements specified in the greatest amount, followed by the respective percentages and a serial letter. The letters that represent the alloying elements are: A for aluminum; C for copper; E for rare earths; J for strontium; K for zirconium; L for lithium; M for manganese; Q for silver; S for silicon; T for tin; V for gadolinium; W for yttrium; and Z for zinc. For unalloyed metals, designations shall consist of the specified minimum purity, followed by a serial letter. For both cases, the full name of the base metal precedes the designation, but is omitted for brevity when the base metal being referred to is obvious.
SCOPE
1.1 This practice provides a system for designating unalloyed magnesium and magnesium-alloys that have been used commercially since 1952, and thus is intended to be the registration source for unalloyed magnesium and magnesium-alloys. A record of designations along with the established compositions is given in Table 2.
1.2 The equivalent Unified Numbering System (UNS) alloy designations shown in the appendixes are in accordance with Practice E527.

General Information

Status
Historical
Publication Date
31-Oct-2011
ICS
77.150.20 - Magnesium products
Technical Committee
B07 - Light Metals and Alloys
Drafting Committee
B07.04 - Magnesium Alloy Cast and Wrought Products
Current Stage
Ref Project

Relations

Replaces
ASTM B951-10 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
Effective Date
01-Nov-2011
Replaced By
ASTM B951-11(2018) - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
Effective Date
01-May-2018
Referred By
ASTM B843-18e1 - Standard Specification for Magnesium Alloy Anodes for Cathodic Protection
Effective Date
01-Nov-2011
Referred By
ASTM B94-18 - Standard Specification for Magnesium-Alloy Die Castings
Effective Date
01-Nov-2011
Referred By
ASTM B403-20 - Standard Specification for Magnesium-Alloy Investment Castings
Effective Date
01-Nov-2011
Referred By
ASTM B93/B93M-21 - Standard Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
Effective Date
01-Nov-2011
Referred By
ASTM B91-17 - Standard Specification for Magnesium-Alloy Forgings
Effective Date
01-Nov-2011
Referred By
ASTM B107/B107M-13(2021) - Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire
Effective Date
01-Nov-2011
Referred By
ASTM B199-17 - Standard Specification for Magnesium-Alloy Permanent Mold Castings
Effective Date
01-Nov-2011
Referred By
ASTM B80-23 - Standard Specification for Magnesium-Alloy Sand Castings
Effective Date
01-Nov-2011
Referred By
ASTM B92/B92M-17 - Standard Specification for Unalloyed Magnesium Ingot and Stick For Remelting
Effective Date
01-Nov-2011

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ASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and WroughtASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
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REDLINE ASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and WroughtREDLINE ASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
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REDLINE ASTM B951-11 - Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
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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:B951 −11
Standard Practice for
Codification of Unalloyed Magnesium and Magnesium-
1
Alloys, Cast and Wrought
This standard is issued under the fixed designation B951; 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* B843 Specification for Magnesium Alloy Anodes for Ca-
thodic Protection
1.1 This practice provides a system for designating unal-
E527 Practice for Numbering Metals and Alloys in the
loyed magnesium and magnesium-alloys that have been used
Unified Numbering System (UNS)
commercially since 1952, and thus is intended to be the
registration source for unalloyed magnesium and magnesium-
3. Basis of Codification
alloys. A record of designations along with the established
compositions is given in Table 2.
3.1 The designations for alloys and unalloyed metals are
1.2 The equivalent Unified Numbering System (UNS) alloy based on their chemical composition limits.
designations shown in the appendixes are in accordance with
NOTE 1—For unalloyed magnesium, magnesium-alloys, cast and
Practice E527. wrought, standard limits for alloying elements and impurities are ex-
pressed to the following places:
Less than 0.0001 % (used only for 0.0000X
2. Referenced Documents
magnesium alloys)
2.1 The following documents form a part of this practice to 0.0001 to 0.001 % 0.000X
0.001 to 0.01 % 0.00X
the extent referenced herein:
0.01 to 0.10 %
2
Unalloyed aluminum made by a refining 0.0XX
2.2 ASTM Standards:
process
B80 Specification for Magnesium-Alloy Sand Castings
Alloys and unalloyed aluminum or 0.0X
B90/B90M Specification for Magnesium-Alloy Sheet and
magnesium
not made by a refining process
Plate
0.10 through 0.55 % 0.XX
B91 Specification for Magnesium-Alloy Forgings
Over 0.55 % 0.X,X.X,XX.X
B92/B92M Specification for Unalloyed Magnesium Ingot
3.2 Designations shall be assigned, revised, and cancelled
and Stick For Remelting
by Subcommittee B07.04 of ASTM Committee B07 on Light
B93/B93M Specification for Magnesium Alloys in Ingot
Metals and Alloys on written requests to its chairman. Com-
Form for Sand Castings, Permanent Mold Castings, and
plete chemical composition limits shall be submitted with
Die Castings
request for assignment or revision of designations. Arbitrary
B94 Specification for Magnesium-Alloy Die Castings
assignments by other subcommittees or committees will not be
B107/B107M Specification for Magnesium-Alloy Extruded
recognized.
Bars, Rods, Profiles, Tubes, and Wire
B199 Specification for Magnesium-Alloy Permanent Mold
Castings 4. Alloys
B403 Specification for Magnesium-Alloy Investment Cast-
4.1 Designationforalloysshallconsistofnotmorethantwo
ings
letters representing the alloying elements (Note 2) specified in
the greatest amount, arranged in order of decreasing
percentages, or in alphabetical order if of equal percentages,
1
This practice is under the jurisdiction of ASTM Committee B07 on Light
followed by the respective percentages rounded off to whole
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
numbers and a serial letter (Note 3). The full name of the base
Magnesium Alloy Cast and Wrought Products.
Current edition approved Nov. 1, 2011. Published January 2011. Originally metal precedes the designation, but it is omitted for brevity
approved in 2007. Last previous edition approved in 2010 as B951 – 10. DOI:
when the base metal being referred to is obvious.
10.1520/B0951-11.
2 NOTE 2—For codification, an alloying element is defined as an element
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
(other than the base metal) having a minimum content greater than zero
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
either directly specified or computed in accordance with the percentages
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specified.
*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 ----------------------
B951−11
NOTE 3—The serial letter is arbitrarily assigned in alphabetical se-
followed by a 5 only, or a 5 followed only by zeros, the nearest
quencestartingwith“A”(omitting“I”and“O”)andservestodifferentiate
even whole number shall be used.
otherwise identical designations. A serial letter is necessary to complete
4.4 When a range is specified for the alloying element, the
each designation.
rounded mean shall be used in the designation.
4.2 The letters used to represent the two greatest
...

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:B951–10 Designation: B951 – 11
Standard Practice for
Codification of Unalloyed Magnesium and Magnesium-
1
Alloys, Cast and Wrought
This standard is issued under the fixed designation B951; 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 (ϵ) indicates an editorial change since the last revision or reapproval.
Note—Table 2 and section 4.2 were corrected editorially and the year date changed on Jan. 29, 2010.
1. Scope*
1.1 This practice provides a system for designating unalloyed magnesium and magnesium-alloys that have been used
commercially since 1952, and thus is intended to be the registration source for unalloyed magnesium and magnesium-alloys. A
record of designations along with the established compositions is given in Table 2.
1.2 The equivalent Unified Numbering System (UNS) alloy designations shown in the appendixes are in accordance with
Practice E527.
2. Referenced Documents
2.1 The following documents form a part of this practice to the extent referenced herein:
2
2.2 ASTM Standards:
B80 Specification for Magnesium-Alloy Sand Castings
B90/B90M Specification for Magnesium-Alloy Sheet and Plate
B91 Specification for Magnesium-Alloy Forgings
B92/B92M Specification for Unalloyed Magnesium Ingot and Stick For Remelting
B93/B93M Specification for MagnesiumAlloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
B94 Specification for Magnesium-Alloy Die Castings
B107/B107M Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire
B199 Specification for Magnesium-Alloy Permanent Mold Castings
B403 Specification for Magnesium-Alloy Investment Castings
B843 Specification for Magnesium Alloy Anodes for Cathodic Protection
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)(UNS)
3. Basis of Codification
3.1 The designations for alloys and unalloyed metals are based on their chemical composition limits.
NOTE 1—For unalloyed magnesium, magnesium-alloys, cast and wrought, standard limits for alloying elements and impurities are expressed to the
following places:
Less than 0.0001 % (used only for magnesium alloys) 0.0000X
0.0001 to 0.001 % 0.000X
0.001 to 0.01 % 0.00X
0.01 to 0.10 %
Unalloyed aluminum made by a refining process 0.0XX
Alloys and unalloyed aluminum or magnesium 0.0X
not made by a refining process
0.10 through 0.55 % 0.XX
Over 0.55 % 0.X,X.X,XX.X
3.2 Designations shall be assigned, revised, and cancelled by Subcommittee B07.04 ofASTM Committee B07 on Light Metals
and Alloys on written requests to its chairman. Complete chemical composition limits shall be submitted with request for
assignment or revision of designations. Arbitrary assignments by other subcommittees or committees will not be recognized.
1
This practice is under the jurisdiction ofASTM Committee B07 on Light Metals andAlloys and is the direct responsibility of Subcommittee B07.04 on MagnesiumAlloy
Cast and Wrought Products.
CurrenteditionapprovedJan.29,2010.PublishedMarch2010.Originallyapprovedin2007.Lastpreviouseditionapprovedin2009asB951–09.DOI:10.1520/B0951-10.
Current edition approved Nov. 1, 2011. Published January 2011. Originally approved in 2007. Last previous edition approved in 2010 as B951 – 10. DOI:
10.1520/B0951-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM 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 ----------------------
B951 – 11
4. Alloys
4.1 Designation for alloys shall consist of not more than two letters representing the alloying elements (Note 2) specified in the
greatest amount, arranged in order of decreasing percentages, or in alphabetical order if of equal percentages, followed by the
respective percentages rounded off to whole numbers and a serial letter (Note 3). The full name of the base metal precedes the
designation, but it is omitted for brevity when the base metal being referred to is obvious.
NOTE 2—For codification, an alloying element is defined as an element (other than the base metal) having a minimum content greater than zero either
directly speci
...

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Standard Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought

ABSTRACT
This practice provides a system for the codification of unalloyed magnesium and magnesium alloys in the cast and wrought forms. Code designations shall be based on their chemical composition limits. For alloys, designations shall consist of not more than two letters representing the alloying elements specified in the greatest amount, followed by the respective percentages and a serial letter. The letters that represent the alloying elements are: A for aluminum; C for copper; E for rare earths; J for strontium; K for zirconium; L for lithium; M for manganese; Q for silver; S for silicon; T for tin; V for gadolinium; W for yttrium; and Z for zinc. For unalloyed metals, designations shall consist of the specified minimum purity, followed by a serial letter. For both cases, the full name of the base metal precedes the designation, but is omitted for brevity when the base metal being referred to is obvious.
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This specification covers the standard for magnesium alloys in ingot and stick forms proposed for used in remelting. Magnesium 9980A alloys are available in ingot and stick form. Magnesium 9980B, 9990A, 9995A, and 9998A, on the other hand, are generally available in ingot form only. The specimens shall be produced with no slag and shall have a clean surface free from dirt, slag, or other foreign contaminants. Alloys shall adhere to specified chemical composition requirements. Any suitable chemical analysis method can be used unless otherwise prescribed.
SCOPE
1.1 This specification covers magnesium in the form of ingot and stick for remelting: 9980A is available in ingot and stick form, and 9980B, 9990A, 9995A, and 9998A are generally available only in ingot form.  
1.2 The values stated in SI units are to be regarded as a separate standard. The values stated in each system are not exact equivalents, therefore each system must be used independently of the other.  
1.3 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.

  • Technical specification
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  • Technical specification
    3 pages
    English language
    sale 15% off