1、Designation: B6 13B6 18 American 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
2、 case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This
3、 specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in fivegrades 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
4、in Specification B852. Other continuous galvanizing and controlled lead grades are notincluded in this specification but are covered by specific user purchasing specifications.1.2 This specification does not cover zinc produced by “sweating” or remelting of secondary zinc.1.3 The values stated in in
5、ch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It
6、is the responsibilityof the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety DataSheet (MSDS)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, andhealthenvironmental
7、practices, and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides
8、and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect on the date of material purchase form a part of this specification to the extentreferenced herein.2.2 ASTM Standards:2B852 S
9、pecification for Continuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet SteelB897 Specification for Configuration of Zinc and Zinc Alloy Jumbo, Block, Half Block, and Slab IngotB899 Terminology Relating to Non-ferrous Metals and AlloysB914 Practice for Color Codes on Zinc an
10、d Zinc Alloy Ingot for Use in Hot-Dip Galvanizing of SteelB949 Specification for General Requirements for Zinc and Zinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in the Unified Number
11、ing System (UNS)E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys1 This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zincand Cadmium.Current edition approved Feb. 1, 2013Nov. 1,
12、2018. Published March 2013January 2019. Originally approved in 1911. Last previous edition approved in 20122013 asB6 12.B6 13. DOI: 10.1520/B0006-13.10.1520/B0006-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Bo
13、ok of ASTM Standardsvolume information, refer to the standardsstandards Document Summary page on the ASTM website.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. Becauseit may not
14、 be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end
15、 of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.3 ISO Standards:3ISO 3815-1 Zinc and zinc alloys Part 1: Analysis of solid samples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis by
16、inductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with Terminology B899.3.2 Definitions of Terms Specific to This Standard:3.2.1 LME Grade, na grade of zinc containing a minimum of 99.995 % zinc, with controlled impurity levels, as specifi
17、ed inTable 1.3.2.2 Special High Grade, na high purity grade of zinc containing a minimum of 99.990 % zinc, with controlled impuritylevels, as specified in Table 1.3.2.3 High Grade, na grade of zinc containing a minimum of 99.95 % zinc, with controlled impurity levels, as specified inTable 1.3.2.4 In
18、termediate Grade, na grade of zinc containing a minimum of 99.5 % zinc, with controlled impurity levels, as specifiedin Table 1.3.2.5 Prime Western Grade, na grade of zinc containing 0.5 to 1.4 % lead, a minimum of 98.5 % zinc, with controlledimpurity levels, as specified in Table 1.3.3 Abbreviation
19、s: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 Information4.1 Orders for zinc metal under this specification shall include information as specified in See Specification B949, Section 45. Mate
20、rials and Manufacture5.1 The manufacturer shall use care to have each lot of zinc metal be as uniform in quality as possible.6. Chemical Requirements6.1 The zinc metal shall conform to the requirements prescribed in Table 1.6.2 Chemical requirement procedures shall be in compliance with the provisio
21、ns of See Specification B949, Section 5.23 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 Chemical RequirementsNOTE 1The following applies to all specified limits in this table: For purposes of determining confor
22、mance 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.GradeUNSAComposition,%ColorCodeB LeadIronmaxCadmiumma
23、xAlumi-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 Grade(HG) Z14003Green 0.03 max 0.02 0.01 0.01 0.002 0.001 0.
24、05 99.95Intermediate Grade(IG) Z16005Blue 0.45 max 0.05 0.01 0.01 0.20 . 0.5 99.5Prime Western Grade(PWG) Z18005Black 0.51.4 0.05 0.20 0.01 0.10 . 1.5 98.5A UNS designations were established in accordance with Practice E527.B Refer to Practice B914.C For London Metal Exchange (LME) purposes, Special
25、 High Grade zinc must be 99.995 % minimum zinc content by difference, corresponding to LME Grade in ASTMSpecification B6.B6 1827. 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 ordered in jumbos or blocks, as specifi
26、ed in Specification B897.7.3 Zinc metal may also be ordered in anodes or other shapes.8. Appearance8.1 The zinc metal shall be reasonably free of surface corrosion and adhering foreign matter.9. Sampling for Chemical Analysis9.1 Sampling procedures shall be in compliance with the provisions of See S
27、pecification B949, Section 610. Methods of Chemical Analysis10.1 In case of disagreement, results secured by an approved method or a method mutually agreed upon by both parties shallbe the basis of acceptance. Approved methods include Test Methods E536, ISO 3815-1and ISO 3815-1 and ISO 3815-2.NOTE 2
28、Test Methods E536 is directly applicable, in an unmodified form, only to alloys 3, 5, and 7. ISO 3815-1 and ISO 3815-2 are generic methodsapplied to zinc and zinc alloys. Each of the methods may be modified and formatted for the alloy to be assayed. An experienced chemist, using suitableand/or trace
29、able standards along with valid quality assurance techniques, will be able to perform and validate the methods and demonstrate acceptableprecision and accuracy.11. Rejection and Rehearing11.1 Claims to be considered in accordance with the provisions of See Specification B949, Section 812. Investigat
30、ion of Claims12.1 Claims shall be investigated in accordance with the provisions of See Specification B949, Section 813. Settlement of Claims13.1 Claims shall be settled in accordance with the provisions of See Specification B949, Section 814. Product Identification Marking and Packaging14.1 Each sl
31、ab, block, jumbo or ingot shall be marked for identification in accordance with the provisions of See SpecificationB949, Section 1015. Keywords15.1 high grade zinc; intermediate grade zinc; LME grade zinc; prime western zinc; special high grade zinc; zinc; zinc metalSUMMARY OF CHANGESCommittee B02 h
32、as identified the location of selected changes to this standard since the last issue (B6 - 12)13) that may impact the use of this standard. (Approved FebruaryNovember 1, 2013.)2018.)(1) UNS numbers were added.Section references to Specification B949 were removed.Committee B02 has identified the loca
33、tion of selected changes to this standard since the last issue (B6 - 09)that may impact the use of this standard. (Approved May 1, 2012.)(1) Note added to Section 10 about use of referenced analytical methods.B6 183ASTM International takes no position respecting the validity of any patent rights ass
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