ASTM B275-05(2013)

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Designation:B275 −05(Reapproved 2013)
Standard Practice for
Codification of Certain Nonferrous Metals and Alloys, Cast
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-
(Withdrawn 2011)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.
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
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
This practice is under the jurisdiction ofASTM Committee B02 on Nonferrous
request for assignment or revision of designations. Arbitrary
Metals andAlloys and is the direct responsibility of Subcommittee B02.04 on Zinc
and Cadmium.
assignments by other subcommittees or committees will not be
Current edition approved Aug. 1, 2013. Published August 2013. Originally
recognized.
approved in 1962. Last previous edition approved in 2005 as B275 – 05. DOI:
10.1520/B0275-05R13.
2 3
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.
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 (2013)
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—Iron T—Tin
4.1 Designationforalloysshallconsistofnotmorethantwo
G—Magnesium V—Gadolinium
letters representing the alloying elements (Note 2) specified in
H—Thorium W—Yttrium
the greatest amount, arranged in order of decreasing J—Strontium X—Calcium
K—Zirconium Y—Antimony
percentages, or in alphabetical order if of equal percentages,
L—Lithium Z—Zinc
followed by the respective percentages rounded off to whole
M—Manganese
numbers and a serial letter (Notes 3 and 4). 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.
4.4 When a range is specified for the alloying element, the
NOTE 2—For codification, an alloying element is defined as an element
(other than the base metal) having a minimum content greater than zero rounded mean shall be used in the designation.
either directly specified or computed in accordance with the percentages
4.5 When only a minimum percentage is specified for the
specified.
alloying element, the rounded minimum percentage shall be
NOTE 3—The serial letter is arbitrarily assigned in alphabetical se-
quencestartingwith“A”(omitting“I”and“O”)andservestodifferentiate used in the designation.
otherwise identical designations. A serial letter is necessary to complete
each designation.
5. Unalloyed Metals
NOTE 4—The designation of a casting alloy in ingot form is derived
5.1 Designations for unalloyed metals consist of the speci-
from the composition specified for the corresponding alloy in the form of
castings. Thus, a casting ingot designation may consist of an alloy fied minimum purity, all digits retained but dropping the
designation having one or more serial letters, one for each product
decimal point, followed by a serial letter (Note 3). The full
composition, or it may consist of one or more alloy designations.
name of the base metal precedes the designation, but it is
4.2 The letters used to represent alloying elements shall be
omitted for brevity when the base metal being referred to is
those in Table 1.
obvious.
4.3 Inroundingpercentages,thenearestwholenumbershall
6. Keywords
be used. If two choices are possible as when the decimal is
followed by a 5 only, or a 5 followed only by zeros, the nearest 6.1 aluminum; lead; magnesium; tin; UNS designations;
zinc
even whole number shall be used.
APPENDIXES
(Nonmandatory Information)
X1. EXAMPLES OF CODIFICATION
X1.1 Example 1—For Alloy CG181A in Specification the alloying element specified in the second greatest amount;
B327, “C” represents copper, the alloying element specified in
“9” indicates that the rounded mean aluminum percentage lies
the greatest amount; “G” represents magnesium, the alloying
between 8.6 and 9.4; “1” signifies that the rounded mean of the
element specified in the second greatest amount; 18 indicates
zinc lies between 0.6 and 1.4; and “A” as the final letter
that the rounded mean copper percentage lies between 17 and
indicates that this is the first alloy whose composition qualified
19; 1 signifies the nearest whole number for magnesium
assignment of the designation AZ91. The final serial letters B
percentage; and “A” as the final letter indicates that this is the
and C signify alloys subsequently developed whose specified
first alloy qualified and assigned under the designation CG181.
compositions differ slightly from the first and from one another
but do not differ sufficiently to effect a change in the basic
X1.2 Example 2—For Alloys AZ91A, B, and C, in Speci-
designation.
fication B93/B93M, “A” represents aluminum, the alloying
element specified in the greatest amount; “Z” represents zinc,
B275−05 (2013)
X2. DESIGNATIONS FOR METALS AND ALLOYS ASSIGNED IN CONFORMANCE WITH PRACTICE B275, FOR CODIFI-
CATION OF CERTAIN NONFERROUS METALS AND ALLOYS
X2.1 Designations for metals and alloys assigned in confor-
mance with Practice B275, and the ASTM specifications in
which they are used, are shown in Table X2.1.
TABLE X2.1 Designations Assigned for Nonferrous Metals and
Alloys in Conformance with Practice B275
Designation ASTM Specifications
Practice B275 UNS B37 B102 B86 B240 B327
Aluminum alloy
850A * . . . .
900A * . . . .
920A * . . . .
950A * . . . .
980A * . . . .
990A * . . . .
CG181A . . . . *
G1C . . . . *
ZG71A . . . . *
Lead alloy
Y10A . * . . .
YT155A . * . . .
Tin alloy
CY44A . * . . .
PY1815A . * . . .
YC135A . * . . .
Zinc alloy
AC41A Z35531 . . * . .
AG40A Z35520 . . * . .
AC41A Z35530 . . . * .
AG40A Z33521 . . . * .
AC43A Z35541 . . * . .
AG40B Z33523 . . * . .
AC43A Z35540 . . . * .
AG40B Z33522 . . . * .
* Alloys appear in applicable specifications which are found in the Annual Book
of ASTM Standards, Vol 02.02.
X3. DESIGNATIONS FOR METALS AND ALLOYS FORMERLY ASSIGNED IN CONFORMANCE WITH PRACTICE B275
X3.1 Designations assigned in conformance with this prac- now designations conforming to the American National Stan-
tice were used for wrought aluminum and wrought aluminum dard Alloys and Temper Designation Systems for Aluminum
alloys in ASTM specifications prior to 1960 and for cast (ANSI H35.1) are standard with the UNS, Practice E527 for
aluminum and aluminum alloys and ingot prior to 1974 but information only. The former ASTM designations and the
TABLE X3.1 Wrought Aluminum Alloys
Designations Designations
Former Former
ANSI H35.1 UNS ANSI H35.1 UNS
B275 – 63 B275 – 63
1060 996A A91060 5056 GM50A A95056
1100 990A A91100 5083 GM41A A95083
2011 CB60A A92011 5086 GM40A A95086
2014 CS41A A92014 5154 GR40A A95154
2017 CM41A A92017 5254 GR40B A95254
2018 CN42C A92018 5454 GM31A A95454
2024 CG42A A92024 5456 GM51A A95456
2117 CG30A A92117 5652 GR20B A95652
3003 M1A A93003 6053 GS11B A96053
3004 MG11A A93004 6061 GS11A A96061
4032 SG121A A94032 6063 GS10A A96063
5005 G1B A95005 6101 GS10B A96101
5050 G1A A95050 7075 ZG62A A97075
5052 GR20A A95052
B275−05 (2013)
correspondingANSI and UNS designations for wrought alloys
are as shown in Table X3.1. Cast alloys and ingot are as shown
in Table X3.2.
X4. MAGNESIUM-ALLOY REGISTRATION
X4.1 Aregistration record of magnesium alloys with estab-
lished designations and chemical composition is shown in
Table X4.1.
A
TABLE X3.2 Cast Aluminum Alloys and Aluminum Alloys in Ingot Form
Designations Designations
Former Former
ANSI H35.1 UNS ANSI H35.1 UNS
B275 – 63 B275 – 63
201.0 CQ51A A02010 380.0 SC84B A03800
201.2 CQ51A A02012 380.2 SC84C A03802
B
... CS42A ... A380.0 SC84A A13800
208.0 CS43A A02080 A380.1 SC84A-B A13801
208.1 CS43A A02081 383.0 SC102A A03830
C
... CS66A ... 383.1 SC102A A03831
222.0 CG100A A02220 384.0 SC114A A03840
222.1 CG100A A02221 384.1 SC114A A03841
D C
... CS72A ... ... SC122A ...
C D
... CS74A ... ... SF101A ...
E
238.0 CS104A A02380 413.0 S12B A04130
F
238.1 CS104A A02381 413.2 S12C A04132
242.0 CN42A A02420 A413.0 S12A A14130
242.1 CN42A A02421 A413.1 S12A-B A14131
295.0 C4A A02950 443.0 S5B A04430
295.1 C4A A02951 443.1 S5B A04431
G
... SC64A ... 443.2 S5A A04432
G E
... SC64B ... A443.0 S5B A14430
C F
... SC64C ... A443.1 S5B A14431
319.0 SC64D A03190 B443.0 S5A A24430
319.1 SC64D A03191 C443.0 S5C A34430
328.0 SC82A A03280 C443.1 S5C A34431
328.1 SC82A A03281 A444.0 S7A A14440
332.0 SC103A A03320 A444.2 S7A A14442
E
332.1 SC103A A03321 512.0 GS42A A05120
H F
... SC104A ... 512.2 GS42A A05122
D
333.0 SC94A A03330 . GS31A .
333.1 SC94A A03331 513.0 GZ42A A05130
336.0 SN122A A03360 513.2 GZ42A A05132
336.1 SN122A A03361 514.0 G4A A05140
354.0 SC92A A03540 514.1 G4A A05141
354.1 SC92A A03541 518.0 G8A A05180
355.0 SC51A A03550 518.1 G8A A05181
355.1 SC51A A03551 520.0 G10A A05200
355.2 SC51C A03552 520.2 G10A A05202
C355.0 SC51B A33550 535.0 GM70B A05350
C355.2 SC51B A33552 535.2 GM70B A05352
356.0 SC70A A03560 705.0 ZG32A A07050
356.1 SC70A A03561 705.1 ZG32A A07051
356.2 SC70C A03562 707.0 ZG42A A07070
A356.0 SC70B A13560 707.1 ZG42A A07071
A356.2 SC70B A13562 710.0 ZG61B A07100
A357.0 SG71A A03570 710.1 ZG61B A07101
359.0 SC91A A03590 711.0 ZG60A A07110
359.2 SG91A A03592 711.1 ZG60A A07111
360.0 SG100B A03600 712.0 ZG61A A07120
360.2 SG100C A03602 712.2 ZG61A A07122
A360.0 SG100A A13600 713.0 ZC81A A07130
A360.1 SG100A-B A13601 713.1 ZC81B A07131
A
Alloys appear in applicable specifications in the Annual Book of ASTM Standards, Vol 02.02, except as otherwise noted.
B
Last appeared in Specification B179 – 63.
C
Last appeared in Specification B179 – 72.
D
Last appeared in Specification B179 – 64.
E
Last appeared in Specification B108 – 80.
F
Last appeared in Specification B179 – 78.
G
Last appeared in Specification B179 – 58.
H
Last appeared in Specification B179 – 65.
B275−05 (2013)
TABLE X4.1 Magnesium-Alloy Registration Record
NOTE 1—These are cast or wrought product compositions (except M19XXX) casting ingot compositions may be different.
Designation Chemical Composition, % max unless shown as a range or as a min
Other Elements
Prac- Man-
Magne- Alumi- Cal- Cop- Gado- Neod- Rare Sili- Stron- Yt- Zirco-
tice UNS Iron Lithium ga- Nickel Silver Zinc
To-
sium num cium per linium ymium Earths con tium trium nium
Specific Each
B275 nese
tal
9980A M19980 99.80 min 0.02 0.10 0.001 0.01 Sn, 0.05
0.01 Pb
9980B M19981 99.80 min 0.02 0.10 0.005 0.01 Sn, 0.05
0.01 Pb
9990A M19990 99.90 min 0.003 0.04 0.004 0.001 0.005 0.00007B, 0.01
0.0001
Cd
9995A M19995 99.95 min 0.010 0.003 0.004 0.001 0.005 0.00003B0.005
9998A M19998 99.98 min 0.004 0.0005 0.002 0.002 0.0005 0.003 0.01Ti, 0.005
0.00005
Cd,
0.00003B,
0.001
Pb
A B B
AJ52A M17520 remainder 4.5–5.5 0.010 0.004 0.24–0.6 0.001 0.10 1.7–2.3 0.22 0.01
A B B
AJ62A M177620 remiander 5.5–6.6 0.010 0.04 0.24–0.6 0.001 0.10 2.0–2.8 0.22 0.01
B B
AM50A M10500 remainder 4.4–5.4 0.010 0.004 0.26–0
...