ASTM B129-07
(Specification)Standard Specification for Cartridge Brass Cartridge Case Cups
Standard Specification for Cartridge Brass Cartridge Case Cups
ABSTRACT
This specification establishes the requirements for annealed cartridge brass cups produced of Copper Alloy UNS No. C26000 for processing into for Type I and II cartridge cases, which are for small arms cartridge case cups and for artillery cartridge case cups, respectively. The material of manufacture shall be annealed plate, sheet, strip, or disks of wrought Alloy UNS No. 26000 processed to produce even-topped cups. The material shall be blanked and cupped to meet the cup dimensions specified, and subsequently annealed. The annealed cups shall be pickled, washed, and dried. The chemical and the grain size requirements are specified.
SCOPE
1.1 This specification establishes the requirements for annealed cartridge brass cups produced of Copper Alloy UNS No. C26000 for processing into cartridge cases of the following types:
1.1.1 Type I for small arms cartridge case cups, and
1.1.2 Type II for artillery cartridge case cups.
1.2 The values stated in inch-pound units are the standard, except for grain size, which is given in SI units. Values in parentheses are for information only.
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Designation: B129 – 07
Standard Specification for
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Cartridge Brass Cartridge Case Cups
This standard is issued under the fixed designation B129; 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* 4.1.1 ASTM designation and year of issue,
4.1.2 Type (Section 1),
1.1 This specification establishes the requirements for an-
4.1.3 Grain size (Section 7),
nealed cartridge brass cups produced of Copper Alloy UNS
4.1.4 Dimensions and tolerances (see 8.1),
No. C26000 for processing into cartridge cases of the follow-
4.1.5 Drawing number to which order applies (see 8.1), and
ing types:
4.1.6 When the material is purchased for agencies of the
1.1.1 Type I, for small arms cartridge case cups, and
U.S. Government, (see Supplementary Requirements section).
1.1.2 Type II, for artillery cartridge case cups.
1.2 The values stated in inch-pound units are the standard,
5. Material and Manufacture
except for grain size, which is given in SI units. Values in
5.1 Material:
parentheses are for information only.
5.1.1 The material of manufacture shall be annealed plate,
2. Referenced Documents sheet, strip, or disks of wrought Alloy UNS No. C26000
2
processed to produce even-topped cups.
2.1 ASTM Standards:
5.2 Manufacture:
B601 Classification for Temper Designations for Copper
5.2.1 The material shall be blanked and cupped to meet the
and Copper Alloys—Wrought and Cast
cup dimensions specified, and subsequently annealed. The
B846 Terminology for Copper and Copper Alloys
annealed cups shall be pickled, washed, and dried.
E3 Guide for Preparation of Metallographic Specimens
E29 Practice for Using Significant Digits in Test Data to
6. Chemical Composition
Determine Conformance with Specifications
6.1 The product shall conform to the requirements pre-
E112 Test Methods for Determining Average Grain Size
scribed in Table 1.
E255 Practice for Sampling Copper and Copper Alloys for
6.2 Composition limits may be established and analysis
the Determination of Chemical Composition
required for unnamed elements by agreement between manu-
E478 TestMethodsforChemicalAnalysisofCopperAlloys
facturer and purchaser.
3. Terminology 6.3 Either copper or zinc may be taken as the difference
between the sum of all elements analyzed and 100 %. Copper,
3.1 For definitions of terms related to copper and copper
when determined by the difference, must conform to the
alloys, refer to Terminology B846.
requirements of Table 1. When all elements in Table 1 are
3.2 Definitions of Terms Specific to This Standard:
analyzed, their sum shall be 99.7 % min.
3.2.1 cup (cupping), n—a shallow cylindrical shell closed at
one end, normally intended for further fabrication, formed
7. Grain Size of Annealed Tempers
from a blank.
7.1 Unless there is a prior agreement between the purchaser
4. Ordering Information andsupplier,thegrainsizefor0.30,0.45,and0.50caliberswill
be produced to the grain size requirements specified inTable 2.
4.1 Orders of product under this specification should in-
7.1.1 Grain size ranges other than those specified in Table 2
clude the following information:
shall be established by agreement between manufacturer and
purchaser.
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ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
7.1.2 Grainsizerangesforothercupsshallbeestablishedby
andCopperAlloysandisthedirectresponsibilityofSubcommitteeB05.01onPlate,
agreement between manufacturer and purchaser.
Sheet, and Strip.
Current edition approved Oct. 1, 2007. Published October 2007. Originally
8. Dimensions, Mass, and Permissible Variations
approved in 1940. Last previous edition approved in 2002 as B129 – 02. DOI:
10.1520/B0129-07.
8.1 All dimensions and tolerances of cups shall be as
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
indicated on the drawings furnished with the purchase order or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
contract.
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.
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B129 – 07
TABLE 1 Chemical Requirements
11.2.3 Failure of the two samples of Type II cups to comply
Copper Alloy UNS No. C26000 to the grain size requirements shall be cause for rejection of the
lot. If one sample fails, a retest shall be permitted on a sample
Element Composition, %
double that of the original sample. Each of the specimens so
Copper 68.5–
...
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