ASTM B275-05
(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
ABSTRACT
This practice covers a system for designating cast and wrought nonferrous metals and alloys. It was originally adopted for light metals and alloys that are cast and wrought and later extended to heavier base-metal die-casting alloys. Chemical composition limits serve as the basis for the Unified Numbering System (UNS) designations. The temper designations used for all metal forms, except for ingots, follow the alloy designation.
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 have 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 (UNS) alloy designations shown in the appendixes are in accordance with Practice E 527.
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Designation:B275 −05
StandardPractice for
Codification of Certain Nonferrous Metals and Alloys, Cast
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and Wrought
This standard is issued under the fixed designation B275; 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* Foundry and Die Castings
B93/B93M Specification for Magnesium Alloys in Ingot
1.1 This practice covers a system originally adopted for
Form for Sand Castings, Permanent Mold Castings, and
designating light metals and alloys, cast and wrought, and later
Die Castings
extended to certain heavier, base-metal die-casting alloys.
B94 Specification for Magnesium-Alloy Die Castings
Those designations, which are currently being used in specifi-
B102 Specification for Lead- and Tin-Alloy Die Castings
cations under the jurisdiction of Committees B02 on Nonfer-
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(Withdrawn 2011)
rous Metals and Alloys and B07 on Light Metals and Alloys,
B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-
are listed in Table X2.1.
loys in Ingot Form for Foundry and Die Castings
1.1.1 The alloy designations now being used in Committee
B327 Specification for Master Alloys Used in Making Zinc
B07 specifications for aluminum and aluminum-alloy wrought
Die Casting Alloys
and cast products conform to ANSI H35.1. Alloys formerly
E527 Practice for Numbering Metals and Alloys in the
codified by this practice and the correspondingANSI designa-
Unified Numbering System (UNS)
tions are shown in Tables X3.1 and X3.2.
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2.3 ANSI Standard:
1.2 This practice also provides a system for designating
H35.1 Alloy and Temper Designation Systems for Alumi-
magnesium alloys that have been used commercially since
num
1952, and thus is intended to be the registration source for new
3. Basis of Codification
magnesium alloys. A record of designations along with the
established compositions is given in Table X4.1.
3.1 The designations for alloys and unalloyed metals are
based on their chemical composition limits.
1.3 The equivalent Unified Numbering System (UNS) alloy
designations shown in the appendixes are in accordance with
NOTE 1—For aluminum and magnesium alloys, cast and wrought,
Practice E527.
standard limits for alloying elements and impurities are expressed to the
following places:
2. Referenced Documents
Less than 0.0001 % (used only for magnesium alloys) 0.0000X
0.0001 to 0.001 % 0.000X
2.1 The following documents form a part of this practice to
0.001 to 0.01 % 0.00X
the extent referenced herein: 0.01 to 0.10 %
Unalloyed aluminum made by a refining process 0.0XX
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2.2 ASTM Standards:
Alloys and unalloyed aluminum or magnesium not made by 0.0X
a refining process
B37 Specification for Aluminum for Use in Iron and Steel
0.10 through 0.55 % 0.XX
Manufacture
Over 0.55 % 0.X,X.X,XX.X
B80 Specification for Magnesium-Alloy Sand Castings
3.2 Designations shall be assigned, revised, and cancelled
B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy
by Subcommittee B07.07 of ASTM Committee B07 on Light
Metals and Alloys on written requests to its chairman. Com-
plete chemical composition limits shall be submitted with
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This practice is under the jurisdiction of ASTM Committee B07 on Light
request for assignment or revision of designations. Arbitrary
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
Aluminum Alloy Wrought Products.
assignments by other subcommittees or committees will not be
Current edition approved July 1, 2005. Published July 2005. Originally approved
recognized.
in 1962. Last previous edition approved in 2004 as B275 – 04. DOI: 10.1520/
B0275-05.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.astm.org.
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Standards volume information, refer to the standard’s Document Summary page on Available in the Related Materials section (gray pages) of the Annual Book of
the ASTM website. ASTM Standards, Vol 02.02.
*A Summary of Changes section appears at the end of this standard
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B275−05
TABLE 1 Letters Representing Alloying Elements
3.3 The temper designation, which is used for all metal
forms, except ingot, follows the alloy designation and is A—Aluminum N—Nickel
B—Bismuth P—Lead
separated with a dash.
C—Copper Q—Silver
D—Cadmium R—Chromium
4. Alloys
E—Rare earths S—Silicon
F
...
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