ASTM B6-2008 Standard Specification for Zinc.pdf

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1、Designation:B608American Association of StateHighway and TransportationOfficials StandardAASHTO No: M120-77Standard Specification forZinc1This standard is issued under the fixed designation B 6; the number immediately following the designation indicates the year of originaladoption or, in the case o

2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specifi

3、cation covers zinc metal made from ore orother material by a process of distillation or by electrolysis infive grades as follows:1.1.1 LME Grade1.1.2 Special High Grade1.1.3 High Grade1.1.4 Intermediate Grade1.1.5 Prime Western GradeNOTE 1Certain continuous galvanizing grades are specified in Speci-

4、fication B 852. Other continuous galvanizing and controlled lead gradesare not included in this specification but are covered by specific userpurchasing specifications.1.2 This specification does not cover zinc produced by“sweating” or remelting of secondary zinc.1.3 The values stated in inch-pound

5、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.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespon

6、sibility 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 health practices, and determine the applicability ofreg

7、ulatory 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:2B 852 Specification for Continuous Galvanizing Grade(CGG) ZincAlloys for Hot

8、-Dip Galvanizing of Sheet SteelB 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 Signi

9、ficant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys3E88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 527 Practice for Numbering Metals and Alloys in theUni

10、fied Numbering System (UNS)E 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloys2.3 ISO Standards:4ISO 3815-1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission s

11、pectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 Definitions of Terms Specific to This Standard:3.2.1 LME Grade, na grade of zinc containing a mini-mum of 99.995 % zinc, with controlled impurity levels, asspecified in Table 1.3.2.2 Special High Grade, na hi

12、gh purity grade of zinccontaining a minimum of 99.990 % zinc, with controlledimpurity levels, as specified in Table 1.3.2.3 High Grade, na grade of zinc containing a mini-mum of 99.95 % zinc, with controlled impurity levels, asspecified in Table 1.3.2.4 Intermediate Grade, na grade of zinc containin

13、g aminimum of 99.5 % zinc, with controlled impurity levels, asspecified in Table 1.1This 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 Nov. 1, 2008. Publ

14、ished December 2008. Originallyapproved in 1911. Last previous edition approved in 2007 as B607.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Docume

15、nt Summary page onthe ASTM website.3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box

16、C700, West Conshohocken, PA 19428-2959, United States.3.2.5 Prime Western Grade, na grade of zinc containing0.5 to 1.4 % lead, a minimum of 98.5 % zinc, with controlledimpurity levels, as specified in Table 1.3.3 Abbreviations:3.3.1 LMELME Grade Zinc3.3.2 SHGSpecial High Grade Zinc3.3.3 HGHigh Grade

17、 Zinc3.3.4 IGIntermediate Grade Zinc3.3.5 PWGPrime Western Grade 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 (zinc metal),4.1.4 Size (see S

18、ection 7), and4.1.5 Grade (see Table 1).5. Materials and Manufacture5.1 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 var

19、ying in weight from 40 to 60 lb (18 to 27 kg)are all considered standard slabs.7.2 Zinc metal may be ordered in jumbos or blocks, asspecified in Specification B 897.7.3 Zinc metal may also be ordered in anodes or othershapes.8. Appearance8.1 The zinc metal shall be reasonably free of surfacecorrosio

20、n and adhering foreign matter.9. Sampling for Chemical Analysis9.1 The producer may obtain representative samples fromthe molten metal 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

21、 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 PortionA portion representative of thetotal shipment or order shall be selected at random for the finalsample. The portion preferably shall be taken during loading orun

22、loading. From lots containing at least 60 000 lb (27 300 kg)of zinc, one slab shall be taken from every 10 000 lb (4530 kg).From smaller lots, 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, with

23、out 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 adventitious iron with which thesample may have become contaminated from the drill or saw.NOTE 2Sampling by sawing is not recommended for Special HighGrade zinc b

24、ecause complete removal of the final traces of adventitiousiron from sawings is difficult.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 extrem

25、ity 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 hole shall be bored completely through theslab, care being taken to avoid starting the drill in a depressionand to adjust the feed to gi

26、ve drillings 0.010 to 0.020 in. (0.25to 0.51 mm) in thickness. The drill used preferably shall be onetwisted from flat stock. The diameter of the drill shall be12 in.(12.7 mm) for Special High Grade zinc, and shall be516 in. (7.9mm) for other grades of zinc. The drillings shall be broken orcut with

27、clean shears into pieces not over12 in. in length andmixed thoroughly.TABLE 1 Chemical RequirementsNOTE 1The following applies to all specified limits in this table: For purposes of determining conformance with this specification, an observed valueobtained from analysis shall be rounded off “to the

28、nearest unit” in the last right-hand place of figures used in expressing the limiting value, in accordancewith the rounding method of Practice E29.GradeUNSAComposition,%ColorCodeBLeadIronmaxCadmiummaxAlumi-nummaxCoppermaxTinmaxTotalNon-ZincmaxZinc, minby differenceLME Grade(LME) Z12002White 0.003 ma

29、x 0.002 0.003 0.001 0.001 0.001 0.005 99.995Special High GradeC(SHG) Z13001Yellow 0.003 max 0.003 0.003 0.002 0.002 0.001 0.010 99.990High Grade(HG) Z14002Green 0.03 max 0.02 0.01 0.01 0.002 0.001 0.05 99.95Intermediate Grade(IG) Z16003Blue 0.45 max 0.05 0.01 0.01 0.20 . 0.5 99.5Prime Western Grade(

30、PWG) Z18004Black 0.51.4 0.05 0.20 0.01 0.10 . 1.5 98.5AUNS designations were established in accordance with Practice E 527.BRefer to Practice B 914.CFor London Metal Exchange (LME) purposes, Special High Grade zinc must be 99.995 % minimum zinc content by difference, corresponding to LME Grade in AS

31、TMSpecification B 6.B60829.2.4 SawingUsing, preferably, a heat treated high-speedsteel saw, 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

32、 the weight ofsample prescribed in 9.2.5, and cuttings from all the slabs shallbe mixed thoroughly to form a uniform sample.9.2.5 Size of Sample and StorageThe prepared sampleshall weigh at least 1600 g for Special High Grade zinc, and atleast 300 g for other grades of zinc. The properly mixed sampl

33、eshall be split into three equal parts, each of which shall beplaced in a sealed package, one for the manufacturer, one forthe purchaser, and one for a referee, if necessary. Tight,leak-proof, paper sample envelopes or cardboard cartons maybe used to hold the sample.9.3 If the zinc is in shapes othe

34、r 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 preparation not coveredspecifically in this specification shall be carried out in accor-dance with Practice E88.10. Methods of Chemical Analysis1

35、0.1 The chemical compositions enumerated in this speci-fication shall, in case of disagreement, be determined bymethods mutually agreed upon. Preferably the method shouldbe chosen from the ASTM methods listed in Table 2 approvedfor referee purposes, or, ISO 3815-1 or ISO 3815-2. Note TestMethods E47

36、is for tin only.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 one (1) week fromdate of receipt of such claim to inv

37、estigate his records and thenshall agree either to satisfy the claim or send a representativeto the plant of the purchaser.11.1.1 Analysis of Car LotsNo claims shall be consideredunless the minimum samples as specified in 9.2.1 can be shownto such representative.11.1.2 Physical Defects of Individual

38、 PiecesNo claimsshall be considered unless the zinc metal in question, unused,can be shown to such representative.11.1.3 When the zinc metal satisfies the chemical andphysical requirements of this specification, it shall not becondemned for defects in manufacturing, for defects of alloysin which it

39、is used, or for defects in the coating of zinc-coatedproducts.12. Investigation of Claims12.1 The inspector representing the 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

40、, whose decision shall be final.12.2 On a question of metal contents, a sample shall bedrawn in the presence of representatives of both the manufac-turer and the purchaser as described in Section 8. The manu-facturer and the purchaser shall each make an analysis, and ifthe results do not establish o

41、r dismiss the claim to thesatisfaction of both parties, the third sample shall be submittedto a mutually agreeable referee, 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 refer

42、ee shall be paid by the loser or divided in proportionto concession made in case of compromise. In case of rejectionbeing 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 thisspe

43、cification.14. Product Marking14.1 A brand, by which the manufacturer can be identified,shall be cast or die stamped in each slab, block, or ingot.14.2 Each ingot, bundle, or skid shall be marked with theappropriate Color Code for that zinc grade per the requirementsin Practice B 914.15. Keywords15.

44、1 high grade zinc; prime western zinc; special high gradezinc; zinc; zinc metalTABLE 2 Methods of AnalysisMethodASTMDesignationChemical analysis (for tin) E47Chemical analysis E 536B6083SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last is

45、sue (B6-07)that may impact the use of this standard. (Approved November 1, 2008.)(1) Revisions have been made to Sections 2.3 and 10.1 to addanalytical spectrochemical methods ISO 3815-1 andISO 3815-2.Committee B02 has identified the location of selected changes to this standard since the last issue

46、 (B6-06)that may impact the use of this standard. (Approved May 1, 2007.)(1) A reference to Specification B 897 to specify the size andconfiguration of jumbo and block ingots was added.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any i

47、tem 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 rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical co

48、mmittee 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 additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a

49、 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 ASTM 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 serviceas