ASTM B129-96
(Specification)Standard Specification for Cartridge Brass Cartridge Case Cups
Standard Specification for Cartridge Brass Cartridge Case Cups
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: B 129 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Cartridge Brass Cartridge Case Cups
This standard is issued under the fixed designation B 129; 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.
1. Scope * 4.1.2 Type (Section 1),
4.1.3 Grain size (Section 7),
1.1 This specification establishes the requirements for an-
4.1.4 Dimensions and tolerances (see 8.1),
nealed cartridge brass cups produced of Copper Alloy UNS
4.1.5 Drawing number to which order applies (see 8.1), and
No. C26000 for processing into cartridge cases of the follow-
4.1.6 When the material is purchased for agencies of the
ing types:
U.S. Government, (see Supplementary Requirements section).
1.1.1 Type I, for small arms cartridge case cups, and
1.1.2 Type II, for artillery cartridge case cups.
5. Material and Manufacture
1.2 The values stated in inch-pound units are the standard,
5.1 Material:
except for grain size, which is given in SI units. Values in
5.1.1 The material of manufacture shall be annealed plate,
parentheses are for information only.
sheet, strip, or disks of wrought Alloy UNS No. C26000
2. Referenced Documents processed to produce even-topped cups.
5.2 Manufacture:
2.1 ASTM Standards:
5.2.1 The material shall be blanked and cupped to meet the
B 601 Practice for Temper Designations for Copper and
2 cup dimensions specified, and subsequently annealed. The
Copper Alloys—Wrought and Cast
annealed cups shall be pickled, washed, and dried.
E 3 Practice for Preparation of Metallographic Specimens
E 29 Practice for Using Significant Digits in Test Data to
6. Chemical Composition
Determine Conformance with Specification
3 6.1 The material shall conform to the requirements pre-
E 112 Test Methods for Determining Average Grain Size
scribed in Table 1.
E 255 Practice for Sampling Copper and Copper Alloys for
6.2 Limits may be established and analysis required for
Determination of Chemical Composition
unnamed elements by agreement between manufacturer and
E 478 Test Methods for Chemical Analysis of Copper
purchaser.
Alloys
6.3 Either copper or zinc may be taken as the difference
3. Terminology between the sum of all elements analyzed and 100 %. When all
elements in Table 1 are analyzed, their sum shall be 99.7 %
3.1 Definitions:
min.
3.1.1 blank (blanking), n—a piece of metal removed from
sheet or strip, intended for subsequent fabrication such as
7. Grain Size of Annealed Tempers
cupping and drawing.
7.1 Unless there is a prior agreement between the purchaser
3.1.2 cup (cupping), n—a shallow cylindrical shell closed at
and supplier, the grain size for 0.30, 0.45, and 0.50 calibers will
one end, normally intended for further fabrication, formed
be produced to the grain size requirements specified in Table 2.
from a blank.
7.1.1 Grain size ranges other than those specified in Table 2
4. Ordering Information shall be established by agreement between manufacturer and
purchaser.
4.1 Orders of product under this specification should in-
7.1.2 Grain size ranges for other cups shall be established by
clude the following information:
agreement between manufacturer and purchaser.
4.1.1 ASTM designation and year of issue,
8. Dimensions and Permissible Variations
This specification is under the jurisdiction of ASTM Committee B-5 on Copper
8.1 All dimensions and tolerances of cups shall be as
and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
indicated on the drawings furnished with the purchase order or
Sheet and Strip.
contract.
Current edition approved April 10, 1996. Published June 1996. Originally
published as B 129 – 40 T. Last previous edition B 129 – 88.
Annual Book of ASTM Standards, Vol 02.01. 9. Workmanship, Finish, and Appearance
Annual Book of ASTM Standards, Vol 03.01.
4 9.1 The cups shall be uniform in quality and shall be free of
Annual Book of ASTM Standards, Vol 14.02.
oil, grease, oxidation, stains, scale, chips, acid, dirt or grit,
Annual Book of ASTM Standards, Vol 03.05.
*A Summary of Changes section appears at the end of this standard.
B 129
TABLE 1 Chemical Requirements
12. Specimen Preparation
Copper Alloy UNS No. C26000
12.1 For grain size measurements, either tangential grinding
Element Composition, %
and polishing, or cutting, mounting, and polishing methods
Copper 68.5–71.5 may be used to reach the zone (Fig. 1).
Lead, max 0.07
12.1.1 The test specimen shall be prepared in accordance
Iron, max 0.05
with Practice E 3.
Zinc remainder
12.2 Specimens for chemical analysis shall be prepared in
accordance with Practice E 255.
A
TABLE 2 Grain Size Requirements on Sidewall
13. Test Methods
Diameter of Average Grain
Temper
Type Caliber
B
Size, mm
13.1 The properties and chemical compositions enumerated
Designation
min max
in this specification shall, in case of disagreement, be deter-
I 0.30 and 0.45 OS080 0.045 0.120
mined in accordance with the following ASTM methods:
0.50 OS110 0.065 0.150
ASTM
II Grain size subject to agreement by the manufacturer and the pur-
Test Designation
chaser
A
Approximately midway of the length of the sidewall.
Chemical analysis E 478
B
Standard designations are defined in Practice B 601.
Grain size E 3, E112
13.2 The test method(s) used for determination of ele-
dented or bent edges, laminations, slivers, laps, cracks, deep ment(s) required by contractural or purchase order agreement
scratches, wrinkles, or other injurious defects which would shall be as agreed upon between the manufacturer and the
interfere with the purpose for which the cups are intended. The purchaser.
cups, subsequent to annealing, shall be pickled, washed, and 13.3 Grain size measurements shall be made in a zone
dried. which is the approximate midpoint of the side wall length and
thickness of the cups, as shown in Fig. 1. At least three
10. Sampling
measurements shall be made, averaged, and recorded for each
grain size determination.
10.1 The lot size, portion size, and selection of pieces shall
13.4 When specified on the purchase order or contract, grain
be as follows:
size measurements shall also be made on the base of the same
10.1.1 Lot Size—40 000 lb (18 144 kg) or fraction thereof.
cups as 13.3. These measurements shall be made in a zone
10.1.2 Portion Size:
approximately bounding the midpoint of the base, and approxi-
10.1.2.1 For grain size—15 cups for Type I, or 2 cups for
mately the midpoint of the thickness as shown in Fig. 1. At
Type II.
least three measurements shall be made, averaged, and re-
10.1.2.2 For determination of dimensions—200 cups.
corded for each grain size determination.
10.1.2.3 For the visual inspection—2000 cups.
10.1.3 Samples for chemical analysis are to be taken in
14. Significance of Numerical Limits
accordance with Practice E 255.
14.1 For purposes of determining compliance with the
11. Number of Tests and Retests
specified limits for requirements of the properties listed in the
following table, an observed value or a calculated value shall
11.1 Specimens taken from each sample piece selected in
accordance with 10.1.2.1 shall be tested for conformance to the
grain size requirement.
11.2 Retests:
11.2.1 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.
11.2.2 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.
11.2.3 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
FIG. 1 Location of Areas to be Examined for Grain Size in
retested shall meet the specified requirements. Cartridge Case Cups
B 129
be rounded as indicated in accordance with the rounding ments when inspected or tested by the purchaser or his agent
method of Practice E 29. may be rejected.
Rounded Unit for
16.1.2 Rejection shall be reported to the manufacturer or
Property Observed or Calculated Value
supplier promptly and in writing.
Chemical composition nearest unit in the last righthand signif- 16.1.3 In case of dissatisfaction with the results of the test
icant digit used in expressing the
upon which rejection is based, the manufacturer or supplier
limiting value
may make a claim for a rehearing.
Grain size:
Up to 0.055 mm, incl nearest multiple of 0.005 mm
16.2 Rehearing:
Over 0
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