ASTM B275-02e1
(Practice)Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought
Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought
SCOPE
1.1 This practice covers a system originally adopted for designating light metals and alloys, cast and wrought, and later extended to certain heavier, base-metal die-casting alloys. Those designations which are currently being used in specifications under the jurisdiction of Committees B02 on Nonferrous Metals and Alloys and B07 on Light Metals and Alloys are listed in Table X2.1.
1.1.1 The alloy designations now being used in Committee B07 specifications for aluminum and aluminum-alloy wrought and cast products conform to ANSI H35.1. Alloys formerly codified by this practice and the corresponding ANSI designations are shown in Tables X3.1 and X3.2.
1.2 This practice also provides a system for designating magnesium alloys that has been used commercially since 1952, and thus is intended to be the registration source for new magnesium alloys. A record of designations along with the established compositions is given in Table X4.1.
1.3 The equivalent Unified Numbering System alloy designations shown in the appendixes are in accordance with Practice E 527.
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An American National Standard
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Designation: B 275 – 02
Standard Practice for
Codification of Certain Nonferrous Metals and Alloys, Cast
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and Wrought
This standard is issued under the fixed designation B 275; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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e NOTE—Summary of Changes was added editorialy in November 2003.
1. Scope* Form for Sand Castings, Permanent Mold Castings, and
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Die Castings
1.1 This practice covers a system originally adopted for
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B 94 Specification for Magnesium-Alloy Die Castings
designating light metals and alloys, cast and wrought, and later
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B 102 Specification for Lead and Tin Alloy Die Castings
extended to certain heavier, base-metal die-casting alloys.
B 240 Specification for Zinc Alloys in Ingot Form for Die
Those designations which are currently being used in specifi-
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Castings
cations under the jurisdiction of Committees B02 on Nonfer-
B 327 Specification for Aluminum-Alloy Hardeners Used
rous Metals and Alloys and B07 on Light Metals and Alloys are
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in Making Zinc Die-Casting Alloys
listed in Table X2.1.
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E 527 Practice for Numbering Metals and Alloys (UNS)
1.1.1 The alloy designations now being used in Committee
2.3 ANSI Standard:
B07 specifications for aluminum and aluminum-alloy wrought
H35.1 Alloy and Temper Designation Systems for Alumi-
and cast products conform to ANSI H35.1. Alloys formerly
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num
codified by this practice and the corresponding ANSI designa-
tions are shown in Tables X3.1 and X3.2.
3. Basis of Codification
1.2 This practice also provides a system for designating
3.1 The designations for alloys and unalloyed metals are
magnesium alloys that has been used commercially since 1952,
based on their chemical composition limits.
and thus is intended to be the registration source for new
magnesium alloys. A record of designations along with the
NOTE 1—For aluminum and magnesium alloys, cast and wrought,
established compositions is given in Table X4.1. standard limits for alloying elements and impurities are expressed to the
following places:
1.3 The equivalent Unified Numbering System alloy desig-
Less than 0.0001 % (used only for magnesium alloys) 0.0000X
nations shown in the appendixes are in accordance with
0.0001 to 0.001 % 0.000X
Practice E 527.
0.001 to 0.01 % 0.00X
0.01 to 0.10 %
2. Referenced Documents
Unalloyed aluminum made by a refining process 0.0XX
Alloys and unalloyed aluminum or magnesium not made by 0.0X
2.1 The following documents of the issue in effect on date
a refining process
of material purchase form a part of this practice to the extent
0.10 through 0.55 % 0.XX
Over 0.55 % 0.X,X.X,XX.X
referenced herein:
2.2 ASTM Standards:
3.2 Designations shall be assigned, revised, and cancelled
B 37 Specification for Aluminum for Use in Iron and Steel
by Subcommittee B07.07 of ASTM Committee B07 on Light
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Manufacture
Metals and Alloys on written requests to its chairman. Com-
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B 80 Specification for Magnesium-Alloy Sand Castings
plete chemical composition limits shall be submitted with
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B 86 Specification for Zinc-Alloy Die Castings
request for assignment or revision of designations. Arbitrary
B 93/B93M Specification for Magnesium Alloys in Ingot
assignments by other subcommittees or committees will not be
recognized.
3.3 The temper designation, which is used for all metal
forms except ingot, follows the alloy designation and is
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This practice is under the jurisdiction of ASTM Committee B07 on Light
separated therefrom by a dash.
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
Aluminum Alloy Wrought Products.
Current edition approved Apr. 10, 2002. Published June 2002. Originally
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published as B 275 – 62 T. Last previous edition B 275 – 96. Annual Book of ASTM Standards, Vol 01.01.
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Annual Book of ASTM Standards, Vol 02.02. Available in the Related Materials section (gray pages) of the Annual Book of
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Annual Book of ASTM Standards, Vol 02.04. ASTM Standards, Vol 02.02.
*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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B275–02
TABLE 1 Letters Representing Alloying Elements
4. Alloys
A—Aluminum M—Manganese
4.1 Designation for alloys shall consist of not more than two
B—Bismuth N—Nickel
letters representing the alloying elements (Note 2) specified in
C—Copper P—Lead
D—Cadmium Q—Silver
the greatest amount, arranged in order of decreasing pe
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