Oscar Escalera Designation: B 19 — 01 Standard Specification for Cartridge Brass Sheet, Strip, Plate, Bar, and Disks1 This standard is issued under the fixed designation B 19; 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. This standard has been approved for use by agencies of the Department of Defense.

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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. NOTE 1—For any particular copper alloy, reference should be made tothe material specification. NOTE 2—Test Method B may be considered as a possible alternativetest method which does not involve the use of mercury. NOTE 3—This test method is considered historically reliable fordetermining the potential state of residual stress in copper alloys, but notpromoted for use due to the hazards relating to mercury use andenvironmentally appropriate disposal.

No other units of measurement are included in thisstandard. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determines the applica-bility of regulatory limitations prior to use. For specificprecautionary and hazard statements see Sections 1, 6, and 7.

Warning—Mercury has been designated by many regulatoryagencies as a hazardous substance that can cause seriousmedical issues. Mercury, or its vapor, has been demonstrated tobe hazardous to health and corrosive to materials. Cautionshould be taken when handling mercury and mercury contain-ing products.

Referenced Documents2. Summary of Test Method4. Upon removal from the solution, the test speci-men is wiped and immediately examined visually for cracks. Test specimen and test supplies are discarded in accordancewith all federal, state, and local requirements. Significance and Use5. If used for that purpose, the resultsshall be for information only and not a cause for rejection ofthe assembly, its component parts, or the original mill product. Reagents and Materials6. Unless otherwise indicated, it is intended thatall reagents conform to the specifications of the Committee onAnalytical Reagent of the American Chemical Society wheresuch specifications are available.

Current edition approved Oct. Published November Originallyapproved in Pharmacopeial Convention, Inc. United States Used solutions may be replenished as described in 6. After thecrystals are completely dissolved, dilute the solution withwater to mL. Warning—The mercurous nitrate crystalsare obtainable in both the monohydrate and dihydrate form andshould be handled with caution because of their highly toxiceffects.

Warning—When weighing crystals, the weight ofthe water of crystallization should be taken into consideration. The mercurous nitrate crystals are photosensitive and whenthey have turned yellow are difficult to dissolve.

Warning—Care should be exercised when handling and mixing chemi-cals. Qualified personnel using appropriate chemical-laboratory techniques should only do the handling and mixing. Carefully dilute with distilled water to mL. This providesa concentration of g of HgNO3after a slight loss due toheating. Add the water in small portions while stirring toprevent local overdilution.

This gradual dilution, together withthe excess acid, will prevent precipitation of basic salts ofmercury. Warning—Mercuryis a definite health hazard and therefore equipment for thedetection and removal of mercury vapor produced in volatil-ization is recommended.

The use of rubber gloves in testing isadvisable. Then titrate the solutionwith 0. Values of R and X for a litre volume are givenin Table 1.

NOTE 4—If heating is used in either of the previous procedures, thecontainer should be covered with a watch glass to prevent loss of HNO3and water to the atmosphere. After solution is complete, use a smallvolume of retained dilution water to rinse the watch glass into thecontainer.

RX RX0. Sampling and Test Specimen Preparation8. In the event that a testspecimen size is not prescribed in a given rod, wire, or tubespecification, a full cross-section length of mm shall betested.

NOTE 5—The presence of burrs on the test specimen may contribute toacceleration of liquid-metal embrittlement of the mercurous nitratesolution, if not removed prior to performance of the test. Test Procedure9. If necessary, totally immerse thespecimen in an aqueous solution of 15 volume percent sulfuricacid H2SO4 or 40 volume percent nitric acid until all oxidesare completely removed from its surface or pickle in suchsolutions as may be prescribed in the specification for thematerial being tested.

Remove the specimen from the picklingsolution and wash it immediately in running water. Drain thespecimen free of excess water and, at room temperature,immerse it totally in the mercurous nitrate solution prepared inaccordance with 6.

Use at least 15 mL of mercurous nitratesolution per mm2of exposed surface of the test specimen. Wipe off any excess mercury from the surfaceof the specimen with damp cloth or paper towels. Immediatelyexamine it visually for cracks unless a time limitation isprovided in the product specification.

They may not be included with returns for remelt-ing or machined into product. Test Report In-house captive laboratories shall only report Precision and Bias These issues must be addressed on a case by casebasis, since such products and tests are specific for theirrespective requirements and applications.

Approved Oct. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.


ASTM B154 - 16



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