ASTM B131-22

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: B131 − 17 B131 − 22
Standard Specification for
Copper Alloy Bullet Jacket Cups
This standard is issued under the fixed designation B131; 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 bullet jacket preform cups produced of Copper Alloy UNS No. C22000 for
processing into bullet jackets of the following types and classes:
1.1.1 Type I—Caliber 0.30.
1.1.2 Type II—Caliber 0.45.
1.1.3 Type III—Caliber 0.50.
1.1.4 Type IV—As specified in the contract or order.
1.1.5 Class I—Not annealed.
1.1.6 Class II—Annealed.
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, whichunits that 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
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, 2017Oct. 1, 2022. Published April 2017October 2022. Originally approved in 1940. Last previous edition approved in 20122017 as
B131-12.-17. DOI: 10.1520/B0131-17.10.1520/B0131-22.
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
B131 − 22
E478 Test Methods for Chemical Analysis of Copper Alloys
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, see refer to Terminology B846.
3.2 Definitions of Terms Specific to This Standard:
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.issue,
4.1.2 Type and class (Section 1),
4.1.3 Grain size (Section 8),
4.1.4 Dimensions and tolerances (see(Subsection 9.1),
4.1.5 Drawing number to which order applies (see(Subsection 9.1),
4.1.6 Work test requirements, if required (Section 12), and
4.1.7 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. C22000
processed to produce even-topped cups.
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, if required. The annealed cups shall be cleaned to provide a surface suitable for subsequent redrawing into bullet jackets.
6. Chemical Composition
6.1 The product shall conform to the chemical composition requirements prescribed 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
Element Composition, %
Copper 89.0–91.0
Lead, max 0.05
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 the results shall be 99.8 % min.
7. Temper
7.1 The standard tempers for products described in this specification are given in Table 2.
7.1.1 Annealed tempers OS025 and OS040.
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 of class II cups shall 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 taken from each
of two sample portions, and 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 conditions which would interfere with the purpose for which the
cups are intended.
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 chemical analysis—5 cups. In accordance with Practice E255, drillings, millings, etc., shall be taken in approximately
equal weight from each of the sample cups selected and combined into one composite sample. The minimum weight of the
composite sample that is divided into three equal parts shall be 150 g. Each of the three equal parts shall be placed in a package
and sealed: one for the seller, one for the purchaser, and one for an umpire.
11.1.2.2 For grain size—20 cups.
11.1.2.3 For determination of dimensions—200 cups.
TABLE 2 Grain Size Requirements
Standard Temper
Grain Size, mm
Designation
Nominal Min Max
(B601)
OS025 0.025 0.015 0.035
OS040 0.040 0.025 0.050
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11.1.2.4 For the visual inspection—2000 cups.
11.1.2.5 For work tests—500 cups or 5000 cups, when and as required.
12. Number of Tests and Retests
12.1 Test:
12.1.1 Chemical Analysis—See 11.1.2.1.
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, dented or bent edges, and scratches.
12.2.2 Grain Size—Each cup in the sample shall be tested.
12.2.3 Work Test—If required by the purchase order or contract, one of the following work tests may be performed by the
purchaser before approval of a lot for shipment:
12.2.3.1 Five hundred cups or more shall be subjected to a working test by processing them through the first drawing operation.
The cups shall draw satisfactorily without showing defects that will cause them to be unsuitable for the purpose intended.
12.2.3.2 Five thousand cups shall be subjected to a working test by processing them satisfactorily into bullet jackets.
12.3 Retest:
12.3.1 When requested by the manufacturer or supplier, a retest shall be permitted when results of tests obtained by the purchaser
fail to conform to the requirements of the product specification.
12.3.2 If the material fails to pass the visual inspection examination or a work test, or if more than one specimen fails the grain
size test, a retest shall be permitted on a sample double that of the original sample. The result of the retest or retests shall meet
the specified requirements.
12.3.3 Chemical Analysis—An additional sample in accordance with 11.1.2.1 is permitted to be made and tested.
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
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FIG. 1 Location of Areas to Be
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