ASTM B275-04
(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 Tables 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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An American National Standard
Designation: B 275 – 04
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.
1. Scope* B 93/B93M Specification for Magnesium Alloys in Ingot
Form for Sand Castings, Permanent Mold Castings, and
1.1 This practice covers a system originally adopted for
Die Castings
designating light metals and alloys, cast and wrought, and later
B94 Specification for Magnesium-Alloy Die Castings
extended to certain heavier, base-metal die-casting alloys.
B 102 Specification for Lead- and Tin-Alloy Die Castings
Those designations, which are currently being used in specifi-
B 240 Specification for Zinc and Zinc-Aliminum (ZA) Al-
cations under the jurisdiction of Committees B02 on Nonfer-
loys in Ingot Form for Foundry and Die Castings
rous Metals and Alloys and B07 on Light Metals and Alloys,
B 327 Specification for MasterAlloys Used in Making Zinc
are listed in Table X2.1.
Die Casting Alloys
1.1.1 The alloy designations now being used in Committee
E 527 Practice for Numbering Metals and Alloys (UNS)
B07 specifications for aluminum and aluminum-alloy wrought
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2.3 ANSI Standard:
and cast products conform to ANSI H35.1. Alloys formerly
H35.1 Alloy and Temper Designation Systems for Alumi-
codified by this practice and the correspondingANSI designa-
num
tions are shown in Tables X3.1 and X3.2.
1.2 This practice also provides a system for designating
3. Basis of Codification
magnesium alloys that have been used commercially since
3.1 The designations for alloys and unalloyed metals are
1952, and thus is intended to be the registration source for new
based on their chemical composition limits.
magnesium alloys. A record of designations along with the
established compositions is given in Table X4.1.
NOTE 1—For aluminum and magnesium alloys, cast and wrought,
1.3 The equivalent Unified Numbering System (UNS) alloy standard limits for alloying elements and impurities are expressed to the
following places:
designations shown in the appendixes are in accordance with
Less than 0.0001 % (used only for magnesium alloys) 0.0000X
Practice E 527.
0.0001 to 0.001 % 0.000X
0.001 to 0.01 % 0.00X
2. Referenced Documents
0.01 to 0.10 %
2.1 The following documents form a part of this practice to Unalloyed aluminum made by a refining process 0.0XX
Alloys and unalloyed aluminum or magnesium not made by 0.0X
the extent referenced herein:
a refining process
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2.2 ASTM Standards:
0.10 through 0.55 % 0.XX
Over 0.55 % 0.X,X.X,XX.X
B37 Specification for Aluminum for Use in Iron and Steel
Manufacture
3.2 Designations shall be assigned, revised, and cancelled
B 80 Specification for Magnesium-Alloy Sand Castings
by Subcommittee B07.07 of ASTM Committee B07 on Light
B86 SpecificationforZincandZinc-Aluminum(ZA)Alloy
Metals and Alloys on written requests to its chairman. Com-
Foundry and Die Castings
plete chemical composition limits shall be submitted with
request for assignment or revision of designations. Arbitrary
assignments by other subcommittees or committees will not be
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This practice is under the jurisdiction of ASTM Committee B07 on Light
recognized.
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
3.3 The temper designation, which is used for all metal
Aluminum Alloy Wrought Products.
forms, except ingot, follows the alloy designation and is
Current edition approved March 1, 2004. Published March 2004. Originally
e1
approved in 1962. Last previous edition approved in 2002 as B 275 – 02 . separated with a dash.
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
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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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B275–04
TABLE 1 Letters Representing Alloying Elements
4. Alloys
A—Aluminum N—Nickel
4.1 Designationforalloysshallconsistofnotmorethantwo
B—Bismuth P—Lead
letters representing the alloying elements (Note 2) specified in
C—Copper Q—Silver
D—Cadmium R—Chromium
the greatest amount, arra
...
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