1、Designation: B6 12American Association of StateHighway and TransportationOfficials StandardAASHTO No: M120-77Standard Specification forZinc1This standard is issued under the fixed designation B6; the number immediately following the designation indicates the year of originaladoption or, in the case
2、of 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 specif
3、ication 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 B852. 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:2B852 Specification for Continuous Galvanizing Grade(CGG) ZincAlloys for Hot-
8、Dip Galvanizing of Sheet SteelB897 Specification for Configuration of Zinc and ZincAlloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals andAlloysB914 Practice for Color Codes on Zinc and Zinc AlloyIngot for Use in Hot-Dip Galvanizing of SteelB949 Specification for Ge
9、neral Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 ISO
10、Standards:3ISO 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 spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Defini
11、tions 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 high purity grade of zinccontaining a minimum of 99.990 % zinc, with controlledimpurity levels, as s
12、pecified 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 containing aminimum of 99.5 % zinc, with controlled impurity levels, asspecified in Table 1.1This specifica
13、tion 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 May 1, 2012. Published May 2012. Originallyapproved in 1911. Last previous edition approved in 2009 as B6 09. DOI:10
14、.1520/B0006-12.2For 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 Document Summary page onthe ASTM website.3Available from American National Standards In
15、stitute (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 C700, West Conshohocken, PA 19428-2959, United States.3.2.5 Prime Western Grade, na grade of
16、 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 Zinc3.3.4 IGIntermediate Grade Zinc3.3.5 PWGPrime Western Grade Zinc4. Ordering Information
17、4.1 Orders for zinc metal under this specification shallinclude information as specified in Specification B949, Section4.5. Materials and Manufacture5.1 The manufacturer shall use care to have each lot of zincmetal be as uniform in quality as possible.6. Chemical Requirements6.1 The zinc metal shall
18、 conform to the requirementsprescribed in Table 1.6.2 Chemical requirement procedures shall be in compli-ance with the provisions of Specification B949, Section 5.2.7. Sizes and Shapes7.1 Slabs varying in weight from 40 to 60 lb (18 to 27 kg)are all considered standard slabs.7.2 Zinc metal may be or
19、dered in jumbos or blocks, asspecified in Specification B897.7.3 Zinc metal may also be ordered in anodes or othershapes.8. Appearance8.1 The zinc metal shall be reasonably free of surfacecorrosion and adhering foreign matter.9. Sampling for Chemical Analysis9.1 Sampling procedures shall be in compl
20、iance with theprovisions of Specification B949, Section 6.10. Methods of Chemical Analysis10.1 In case of disagreement, results secured by an ap-proved method or a method mutually agreed upon by bothparties shall be the basis of acceptance. Approved methodsinclude Test Methods E536, ISO 3815-1and IS
21、O 3815-2.NOTE 2Test Methods E536 is directly applicable, in an unmodifiedform, only to alloys 3, 5, and 7. ISO 3815-1 and ISO 3815-2 are genericmethods applied to zinc and zinc alloys. Each of the methods may bemodified and formatted for the alloy to be assayed. An experiencedchemist, using suitable
22、 and/or traceable standards along with valid qualityassurance techniques, will be able to perform and validate the methodsand demonstrate acceptable precision and accuracy.11. Rejection and Rehearing11.1 Claims to be considered in accordance with the provi-sions of Specification B949, Section 8.12.
23、Investigation of Claims12.1 Claims shall be investigated in accordance with theprovisions of Specification B949, Section 8.13. Settlement of Claims13.1 Claims shall be settled in accordance with the provi-sions of Specification B949, Section 8.14. Product Identification Marking and Packaging14.1 Eac
24、h slab, block, jumbo or ingot shall be marked foridentification in accordance with the provisions of Specifica-tion B949, Section 10.15. Keywords15.1 high grade zinc; prime western zinc; special high gradezinc; zinc; zinc metalTABLE 1 Chemical RequirementsNOTE 1The following applies to all specified
25、 limits in this 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
26、E29.GradeUNSAComposition,%ColorCodeBLeadIronmaxCadmiummaxAlumi-nummaxCoppermaxTinmaxTotalNon-ZincmaxZinc, minby differenceLME Grade(LME) Z12002White 0.003 max 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 Grad
27、e(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(PWG) Z18004Black 0.51.4 0.05 0.20 0.01 0.10 . 1.5 98.5AUNS designations were established in accordance with Practice E527.BRefer to Practice B9
28、14.CFor London Metal Exchange (LME) purposes, Special High Grade zinc must be 99.995 % minimum zinc content by difference, corresponding to LME Grade in ASTMSpecification B6.B6122SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue (B6
29、 - 09)that may impact the use of this standard. (Approved May 1, 2012.)(1) Note added to Section 10 about use of referenced analyti-cal methods.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of t
30、his 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 y
31、ears 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 meeting of theresponsible technical comm
32、ittee, 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 19
33、428-2959,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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B6123
