1、Designation: B 960 08Standard Specification forPrime Western Grade-Recycled (PWG-R) Zinc1This standard is issued under the fixed designation B 960; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers prime western grade-recycled(PWG-R) zinc made by recycling zinc secondary materialsincluding but not limited to dr
3、osses and skimmings.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety co
4、ncerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish appropriatesafety and
5、 health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on thedate of material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:2B6 Specification for
6、 ZincB 897 Specification for the Configuration of Zinc and ZincAlloy Jumbo and Block IngotB 899 Terminology Relating to Non-ferrous Metals andAlloysB 914 Practice for Color Codes on Zinc and Zinc AlloyIngot for Use in Hot-Dip Galvanizing of SteelE29 Practice for Using Significant Digits in Test Data
7、 toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloys2.3
8、 ISO Standards:3ISO 3815-1 Zinc and zinc alloysPart 1: Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloysPart 2: Analysis byinductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 D
9、efinitions of Terms Specific to This Standard:3.3 Prime Western Grade-Recycled, na grade of zinccontaining 0.5 to 1.4 % lead, a minimum or 98.5 % zinc, withcontrolled impurity levels as specified in Table 1 made byrecycling zinc secondary materials.3.4 Abbreviations:3.4.1 PWG-RPrime Western Grade-Re
10、cycled Zinc4. Ordering Information4.1 Orders for zinc metal under this specification shallinclude the following information:4.1.1 ASTM designation and year of issue,4.1.2 Quantity (weight),4.1.3 Name of material (PWG-R Zinc Metal), and4.1.4 Size and shape (see Section 7).5. Materials and Manufacture
11、5.1 The manufacturer shall use care to have each lot of zincmetal be as uniform in quality as possible.6. Chemical Composition6.1 The zinc metal shall conform to the requirementsprescribed in Table 1.7. Sizes and Shapes7.1 Slabs varying in weight from 40 to 60 pounds (18 to 27kg) are all considered
12、standard slabs.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved April 1, 2008. Published May 2008.2For referenced ASTM standards, visit the ASTM websi
13、te, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:
14、/www.ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 PWG-R Zinc metal may be ordered in jumbos or blocksas specified in Specification B 897.7.3 Other shapes and sizes as may be agreed upon betweenthe producer and the cus
15、tomer if they are cast to the chemicalcomposition requirements prescribed in Table 1.8. Appearance8.1 The PWG-R Zinc metal shall be reasonably free ofsurface corrosion and adhering foreign material.9. Sampling for Chemical Analysis9.1 The producer may obtain representative samples fromthe molten met
16、al during casting, and all or part of thesesamples may be cast into shapes suitable for use in spectro-chemical methods.9.2 If the zinc is in the form of standard slabs at thecustomers plant, the sample for chemical analysis shall betaken in accordance with 9.2.1-9.2.5 inclusive.9.2.1 Selection of P
17、ortionA portion representative of thetotal shipment shall be selected at random for the final sample.The portion preferably shall be taken during loading orunloading. From lots containing at least 60 000 lb (27 300 kg)of zinc, one slab shall be taken from every 10 000 lb (4 530kg). From smaller lots
18、, five slabs shall be taken.9.2.2 Preparation of SampleEach slab shall be cleanedthoroughly to rid the surface of extraneous material and drilledor sawed, without lubricant in accordance with 9.2.3 or 9.2.4.The drillings or sawings shall be subjected to the action of astrong magnet to remove any adv
19、entitious iron with which thesample may have become contaminated from the drill or saw.9.2.3 DrillingTwo holes shall be drilled, preferably fromthe bottom or brand side of each slab, at two points locatedalong one diagonal of the slab so that each point is halfwaybetween the center and one extremity
20、 of the diagonal. If twoholes from each slab do not yield the weight of sampleprescribed in 9.2.5, a third hole shall be drilled at the center ofeach slab. Each slab shall be bored completely through theslab, care being taken to avoid starting the drill in a depressionand to adjust the feed to give
21、drillings 0.010 to 0.020 in. (0.25to 0.51 mm) in thickness. The twist drill shall be used with adiameter of516 in. (7.9 mm). The drillings shall be broken orcut with clean shears into pieces not over12 in. in length andmixed thoroughly.9.2.4 SawingUsing, preferably, a heat treated high-speedsteel sa
22、w, make two cuts completely across and through theslab from one long side to the other. Each cut shall beapproximately halfway between the center and each end. Thewidth of the saw cut shall be sufficient to give the weight ofsample prescribed in 9.2.5, and cuttings from all the slabs shallbe mixed t
23、horoughly to form a uniform sample.9.2.5 Size of Sample and StorageThe prepared sampleshall weigh at least 300 g. The properly mixed sample shall besplit into three equal parts, each of which shall be placed in asealed package, one for the manufacturer, one for the pur-chaser, and one for a referee,
24、 if necessary. Tight, leak-proof,paper sample envelopes or cardboard cartons may be used tohold the sample.9.3 If the zinc is in shapes other than standard slabs, thesampling procedure shall be agreed upon between the manu-facturer or seller and the purchaser.9.4 Aspects of sampling and sample prepa
25、ration not coveredspecifically in this specification shall be carried out in accor-dance with Practice E88.10. Methods of Chemical Analysis10.1 The chemical compositions enumerated in this speci-fication shall, in case of disagreement, be determined by themethods mutually agreed upon and approved fo
26、r refereepurposes by Test Method E 536, ISO 3815-1,orISO 3815-2.11. Claims11.1 Claims to be considered shall be made in writing to themanufacturer within 30 days of receipt of material at thepurchasers plant and the results of the purchasers tests shallbe given. The manufacturer shall be given two (
27、2) weeks fromdate of receipt of such claim to investigate their records andthen shall agree either to satisfy the claim or send a represen-tative to the facility of the purchaser to investigate the matterfurther.TABLE 1 Chemical RequirementsNOTE 1The following applies to all specified limits in this
28、 table: For purposes of determining conformance with this specification, an observed valueobtained from analysis shall be rounded off “to the nearest unit” in the last right-hand place of figures used in expressing the limiting value, in accordancewith the rounding method of Practice E29.Composition
29、, %AGrade(UNS)BColorCodeCLeadIronmaxCadmimummaxAluminummaxCoppermaxTotalNon-ZincmaxDZinc,min. bydifferencePrimeWesternGrade-Recycled,(PWG-R)(Z18004)Black 0.51.4 0.05 0.20 0.01 0.10 1.5 98.5AThis composition will remain the same as specified in B6for Prime Western Grade.BUNS designations were establi
30、shed in accordance with Practice E 527.CRefer to Practice B 914.DPWG-R may contain small amounts of Bi, Ni, and Sn which could affect the galvanizing process or product. The maximum limits for these elements may be agreedupon by written agreement between the producer and consumer.B96008211.2 Analysi
31、s of Car LotsNo claims shall be consideredunless the minimum samples as specified in 9.2.1 can be shownto such representative.11.3 Physical Defects of Individual PiecesNo claims shallbe considered unless the zinc metal in question, unused, can beshown to such representative.11.4 When the zinc metal
32、satisfies the chemical and physicalrequirements of this specification, it shall not be declared out ofconformance for defects in manufacturing, for defects of alloysin which it is used, or for defects in the coating of zinc-coatedproducts.12. Investigation of Claims12.1 The inspector representing th
33、e manufacturer shall ex-amine all pieces where physical defects are claimed. If agree-ment is not reached, the question of fact shall be submitted toa mutually agreeable referee, whose decision shall be final.12.2 On a question of chemical requirements, a sample shallbe drawn in the presence of the
34、representative of both themanufacturer and the purchaser as described in Section 9. Themanufacturer and the purchaser shall each make an analysis,and if the results do not verify nor refute the claim to thesatisfaction of both parties, the third sample shall be submittedto a mutually agreeable refer
35、ee, who shall determine thequestion of quality, and whose determination shall be final.13. Settlement of Claims13.1 The expenses of the manufacturers representative andof the referee shall be paid by the loser or divided in proportionto concession made in case of compromise. In case of rejectionbein
36、g established, maximum damages shall be limited to thepayment of freight both ways by the manufacturer for substi-tution of an equivalent weight of zinc metal conforming to thisspecification.14. Product Marking14.1 A brand, by which the manufacture can be identified,shall be cast or die stamped in e
37、ach slab, jumbo, block, oringot.14.2 Each ingot, bundle, or skid shall be marked with theappropriate color code for that zinc grade in accordance withthe requirements in Practice B 914.15. Keywords15.1 prime western grade-recycled zinc; prime westernzinc; PWG-R; recycled zinc; secondary zinc; zinc;
38、zinc metalASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such r
39、ights, 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. Your comments are invited either for revision of this standard or for addition
40、al standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the AS
41、TM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B960083
