ASTM B129-22

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B129 − 17 B129 − 22
Standard Specification for
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*
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 Units—The values stated in inch-pound units are to be regarded as standard, except for grain size, which is given in SI units.
The values given in parentheses are mathematical conversions to SI units, which are provided for information only and are not
considered standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
B846 Terminology for Copper and Copper Alloys
E3 Guide for Preparation of Metallographic Specimens
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E112 Test Methods for Determining Average Grain Size
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E478 Test Methods for Chemical Analysis of Copper Alloys
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
3.2 Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
Sheet, and Strip.
Current edition approved April 1, 2017May 1, 2022. Published April 2017May 2022. Originally approved in 1940. Last previous edition approved in 20122017 as
B129-12.-17. DOI: 10.1520/B0129-17.10.1520/B0129-22.
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 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
B129 − 22
3.2.1 cup (cupping), n—a shallow cylindrical shell closed at one end, normally intended for further fabrication, formed from a
blank.
4. Ordering Information
4.1 Include the following specified choices when placing orders for product under this specification, as applicable:
4.1.1 ASTM designation and year of issue,
4.1.2 Type (Section 1),
4.1.3 Grain size Temper (Section 87),
4.1.4 Dimensions and tolerances (Section 9),
4.1.5 Drawing number to which order applies (Section 9).
4.2 The following options are available but may not be included unless specified at the time of placing of the order when required:
4.2.1 Grain size analysis of the base (Section 14),
4.2.2 Source inspection (Section 16),
4.2.3 Certification,
4.2.4 Mill Test Report, and
4.2.5 If product is purchased for agencies of the U.S. Government (see the Supplementary Requirements section of this
specification for additional requirements, if specified).
5. Materials and Manufacture
5.1 Materials:
5.1.1 The material of manufacture shall be annealed plate, sheet, strip, or disks of wrought Copper Alloy UNS No. C26000
processed to produce even-topped cups.into the products prescribed herein.
5.2 Manufacture:
5.2.1 The product shall be manufactured by such blanking and cupping to meet the cup dimensions specified, and subsequently
annealed. The annealed cups shall be finish, plain pickled, washed, and dried.
6. Chemical Composition
6.1 The material shall conform to the chemical composition requirements in Table 1.
6.2 These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and
purchaser, limits may be established and analysis required for unnamed elements
TABLE 1 Chemical Requirements
Copper Alloy UNS No. C26000
Element Composition, %
Copper 68.5–71.5
Lead, max 0.07
Iron, max 0.05
Bismuth, max 0.006
Zinc remainder
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6.3 Because zinc is listed as “remainder,” either copper or zinc may be taken as the difference between the sum of results of all
other elements determined and 100 %. When all elements in Table 1 are determined, the sum of results shall be 99.7 % min.
7. Temper
7.1 The standard tempers for products described in this specification are given in Table 2.
7.1.1 Annealed tempers OS080 and OS110.
8. Grain Size for Annealed Tempers
8.1 Grain size shall be the standard requirement for all product in the annealed tempers.
8.1.1 Unless there is a prior agreement between the purchaser and supplier, the grain size for 0.30, 0.45, and 0.50 calibers will
be produced to the grain size requirements specified in Table 2.
8.1.2 Grain size ranges other than those specified in Table 2 shall be established by agreement between the manufacturer and
purchaser.
8.1.3 Grain size ranges for other cups shall be established by agreement between the manufacturer and purchaser.
8.1.4 Acceptance or rejection based upon grain size shall depend only on the average grain size of a test specimen as prescribed
in Section 11. Each specimen shall be within the limits prescribed in Table 2 when determined in accordance with Test Methods
E112.
9. Dimensions, Mass, and Permissible Variation
9.1 All dimensions and tolerances of cups shall be as indicated on the drawings furnished with the purchase order or contract.
10. Workmanship, Finish, and Appearance
10.1 The cups shall be uniform in quality and shall be free of oil, grease, oxidation, stains, scale, chips, acid, dirt or grit, dented
or bent edges, laminations, slivers, laps, cracks, deep scratches, wrinkles, or other injurious defects which would interfere with the
purpose for which the cups are intended. The cups, subsequent to annealing, shall be finish, plain pickled, washed, and dried.
11. Sampling
11.1 The lot size, portion size, and selection of pieces shall be as follows:
11.1.1 Lot Size—40 000 lb (18 144 kg) or fraction thereof.
11.1.2 Portion Size:
11.1.2.1 For grain size—15 cups for Type I, or 2 cups for Type II.
11.1.2.2 For determination of dimensions—200 cups.
A
TABLE 2 Grain Size Requirements on Sidewall
for Annealed (OS) Product
Standard
Diameter of Average Grain
Temper
Type Caliber
Size, mm
DesignationCodes
min max
(B601)
I 0.30 and 0.45 OS080 0.045 0.120
0.50 OS110 0.065 0.150
II Grain size subject to agreement between the manufacturer and
purchaser
A
Approximately midway of the length of the sidewall.
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11.1.2.3 For the visual inspection—2000 cups.
11.1.3 Samples for chemical analysis are to be taken in accordance with Practice E255.
12. Number of Tests and Retests
12.1 Test:
12.1.1 Chemical Analysis—Chemical composition shall be determined in accordance with the element mean of the results from
at least two replicate analyses of the sample(s).
12.2 Other Tests:
12.2.1 Visual Inspection—Each cup in the sample shall be visually inspected.
12.2.1.1 Major Defects—Not more than 0.25 % of the cups in the sample shall contain the following major defects – scaly metal,
deep scratches, laminations, slivers, laps, cracks, and wrinkles.
12.2.1.2 Minor Defects—Not more than 2 % of the cups in the sample shall contain the following minor defects – oily cup, greasy
cup, dirty or gritty cup, oxidized cup, stained cup, dented or bent edges, and scratches.
12.2.2 Grain Size—Specimens taken from each sample piece selected in accordance with 11.1.2.1 shall be tested for conformance
to the grain size requirement.
NOTE 1—A deep scratch is one 0.005 in. (0.13 mm) or greater in depth.
12.3 Retests:
12.3.1 If the chemical analysis fails to conform to the specified limits, analysis shall be made on a composite sample, prepared
from the pieces selected from each portion involved, consisting of either 15 cups from Type I or two cups from Type II. The results
of this retest shall comply with the specified requirements.
12.3.2 Failure of more than two samples of Type I cups to comply to the grain size requirements shall be cause for rejection of
the lot. If two samples fail to comply a retest shall be permitted on a sample double that of the original sample. Each of the
specimens so retested shall meet the specified requirements.
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12.3.2.1 Failure of the two samples of Type II cups to comply 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 double that of the original sample. Each of the specimens so retested
shall meet the specified requirements.
13. Specimen Preparation
13.1 For grain size measurements, either tangential grinding and polishing, or cutting, mounting, and polishing methods may be
used to reach the zone (Fig. 1).
13.1.1 The test specimen shall be prepared in accordance with Guide E3.
13.2 Specimens for chemical analysis shall be prepared in accordance with Practice E255.
14. Test Methods
14.1 Chemical Analyses:
14.1.1 In cases of disagreement, test methods for chemical analysis shall be subject to agreement between the manufacturer or
supplier and the purchaser. The following table is a list of published methods, some of which may no longer be viable which along
with others not listed, may be used subject to agreement.
Test Method
Copper E478
Lead E478 (AA)
Iron E478
Zinc E478 (Titrimetric)
NOTE 2—The following table includes published test methods, which may no longer be viable, for reference.
Test Method
Copper E478
Lead E478 (AA)
Iron E478
Zinc E478 (Titrimetric)
14.1.2 The test Test method(s) to be followed for the determination of element(s) resulting from contractual or purchase order
agreement shall be as agreed upon between the manufacturer or supplier and purchaser.
FIG. 1 Location of Areas to be Examined for Grain Size
in Cartridge Case Cups
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14.1.2.1 Since no recognized test method is known to be published, the determination of bismuth shall be subject to agreement
between the manufacturer and the purchaser.
B129 − 22
14.2 Other Tests:
14.2.1 The product furnished shall conform to specified requirements when subjected to test in accordance with the following
table:
Test Method
Grain Size E3, E112
14.2.2 Grain size measurements shall be made in a zone which is the approximate midpoint of the side wall length and thickness
of the cups, as shown in Fig. 1. At least three measurements shall be made, averaged, and recorded for each grain size
determination. In case of dispute, the intercept method of Test Methods E112 shall be followed.
14.2.3 When specifie
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