ASTM B860-2008 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing.pdf

1、Designation: B 860 08Standard Specification forZinc Master Alloys for Use in Hot Dip Galvanizing1This standard is issued under the fixed designation B 860; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.

2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers zinc master alloys which areused in hot dip galvanizing for the purpose of adjusting theconcentration of c

3、ertain alloying elements in the molten zincbath. Table 1 covers the chemical composition of thesematerials which include six master alloys of zinc-aluminum(brightener) and one master alloy of zinc-antimony.ASTM Common UNSType A-1 90/10 Zn/Al High Purity Z30750Type A-2 90/10 Zn/Al Low Purity Z31710Ty

4、pe A-3 95/5 Zn/Al High Purity Z30503Type A-4 95/5 Zn/Al Low Purity Z31510Type A-5 96/4 Zn/Al High Purity .Type A-6 96/4 Zn/Al Low Purity .Type S-1 90/10 Zn/Sb Z557101.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to

5、 SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified

6、 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 ofregulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in

7、 effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B 897 Specification for the Configuration of Zinc and ZincAlloy Jumbo and Block IngotB 899 Terminology Relating to Non-ferrous Metals andAlloysE29 Practice for Using Significant Di

8、gits 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 theUnified Numb

9、ering 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 spectromet

10、ry3. Terminology3.1 Terms defined in Terminology B 899 shall apply unlessdefined otherwise in this standard.4. Ordering Information4.1 Orders for ingots under this specification shall includethe following information:4.1.1 Quantity, lb,4.1.2 Alloy type (see Table 1),4.1.3 Size and type of ingot (jum

11、bo, type 1 block, type 2block, slab or other ingot shape), if not manufacturers stan-dard,4.1.4 Specification number and year date,4.1.5 Source inspection (see Section 8), and4.1.6 Marking (see Section 10).5. Materials and Manufacture5.1 The material covered by this specification shall be ofuniform

12、quality and shall be free from harmful contamination.The ingot surface shall contain a minimum of dross andadhering foreign matter.6. Chemical Requirements Chemical Requirements6.1 LimitsThe alloys shall conform to the requirements asto chemical composition prescribed in Table 1. Conformance1This sp

13、ecification 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. Published December 2008. Originallyapproved in 1995. Last previous edition approved in 2007 as

14、B 860 - 07.2For 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.3Withdrawn.4Available from American National Stand

15、ards 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 C700, West Conshohocken, PA 19428-2959, United States.shall be determined by the prod

16、ucer by analyzing samplestaken at the time the ingots are made. If the producer hasdetermined the chemical composition of the metal during thecourse of manufacture, he shall not be required to sample andanalyze the finished product.6.2 In case of dispute, the following requirements shallapply:6.2.1

17、Number of SamplesSamples for verification ofchemical composition shall be taken as follows:6.2.1.1 Not less than five ingots shall be taken at randomfrom each car or truckload of the same alloy for sampling.Each heat in the shipment shall be represented. If the shipmentis less than a carload lot, on

18、e sample ingot shall be taken foreach 10 000 lb (4540 kg) or fraction thereof. When it is deemednecessary, a sample may be taken from each melt of 1000 lb(454 kg) or more.6.3 Methods of SamplingSamples from ingots for deter-mination of chemical composition shall be taken in accordancewith one of the

19、 following methods:6.3.1 Samples for chemical analysis shall be taken from thematerial by drilling, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain weight of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.6.3.2 By agreement, an op

20、tional method of sampling wouldbe to select, at random, ingots of the same heat, melt togetherrepresentative portions of each ingot selected, and cast a disc orsuitable sample from the liquid composite for spectrographic orchemical analysis.6.3.3 Samples for chemical analysis may also be in the form

21、of a separately cast spectrographic disc specimen taken fromthe same pour used to cast the ingot.6.3.4 Alternate procedures for sampling and exchange ofsamples shall be agreed upon between the producer and thecustomer.6.4 Method of AnalysisThe determination of chemicalcomposition shall be made in ac

22、cordance with suitable chemi-cal (Test Methods E 536 or Test Methods E47for tin), suitablespectrochemical methods ISO 3815-1 and ISO 3815-2, or othermethods. In case of dispute, the results should preferably besecured by Test Methods E 536 and Test Methods E47for tinonly, or ISO 3815-1 or ISO 3815-2

23、 and shall be the basis ofacceptance.7. Size and Shape7.1 Master alloys may be ordered as jumbos, blocks, slabsor other ingot configurations.7.1.1 Jumbolarge casting of zinc or zinc alloy, havingthrough holes for chains, designed for handling by mechanicalequipment, which is also referred to as a ju

24、mbo or strip jumbo.See Specification B 897 for additional details.7.1.2 Blocklarge casting of zinc or zinc alloy, having liftpockets, designed for handling by mechanical equipment,which is also referred to as block. See Specification B 897 foradditional details.7.1.3 Slabsmaller casting of zinc or z

25、inc alloy, designedfor manual handling. A slab usually weighs about 55 lb (25 kg)but may weigh any where from 40 to 60 lb (18 to 27 kg). Slabsare usually shipped in strapped bundles weighing about 2200 lb(one metric ton).7.1.4 Other shapes and sizes as may be agreed uponbetween the producer and the

26、customer may be cast to thechemical requirements of this specification.8. Source Inspection8.1 If the purchaser desires that his representative inspect orwitness the inspection and testing of the product prior toshipment, such agreement shall be made by the purchaser andproducer or supplier as part

27、of the contract or purchase order.TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)AType A-1 90 % Zinc10 % Aluminum (90/10 Zn/Al) High PurityType A-2 90 % Zinc10 % Aluminum (90/10 Zn/Al) Low PurityType A-3 95 % Zinc5 % Aluminum (95/5 Zn/Al) High PurityType A-4 95 % Zinc5 % Alumin

28、um (95/5 Zn/Al) Low PurityType A-5 96 % Zinc4 % Aluminum (96/4 Zn/Al) High PurityType A-6 96 % Zinc4 % Aluminum (96/4 Zn/Al) Low PurityType S-1 90 % Zinc10 % Antimony (90/10 Zn/Sb)UNSBType A-190/10 Zn/AlZ30750Type A-290/10 Zn/AlZ31710Type A-395/5 Zn/AlZ30503Type A-495/5 Zn/AlZ31510Type A-596/4 Zn/Al

29、ZXXXXXType A-696/4 Zn/AlZXXXXXType S-190/10 Zn/SbZ55710Fe 0.05 max 0.15 max 0.05 max 0.15 max 0.05 max 0.15 max 0.03 maxPb 0.005 max 0.4 max 0.005 max 0.4 max 0.0005 max 0.4 max 0.015 maxCd 0.004 max . 0.004 max . 0.004 max . 0.003 maxCu 0.035 max 0.5 max 0.035 max 0.5 max 0.035 max 0.5 max 0.003 ma

30、xMg . . . . 0.06 max 0.06 maxSn 0.003 max . 0.003 max . 0.003 max . 0.01 maxAs . . . . . . 0.015 maxAl 9.510.5 9.510.5 4.55.5 4.55.5 4.0-4.5 4.0-4.5 .SbC. . . . . . 9.510.5Others, Total 0.01 max 0.25 max 0.01 max 0.25 max 0.01 max 0.25 max 0.03 maxZnDRemainder Remainder Remainder Remainder Remainder

31、 Remainder RemainderAThe following applies to all specified limits in this table: For purposes of determining conformance with this specification, an observed value obtained from analysisshall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting

32、value, in accordance with the rounding method of Practice E29.BUNS numbers in conformance with Practice E 527.CChemical method under development.DFor information only. Quantitative determination of this element is not required. Zinc is assumed to be the difference between 100 % and the sum of those

33、elementslisted above.B8600828.2 When such inspection or witness of inspection andtesting is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests sha

34、ll be conducted in such a mannerthat there is no unnecessary interference with the producersoperations.9. Rejection and Rehearing9.1 Material that fails to conform to the requirements of thisspecification may be rejected. Rejection should be reported tothe producer or supplier promptly and in writin

35、g. In case ofdissatisfaction with the results of the test, the producer orsupplier may make claim for a rehearing. If the rehearingestablishes that the material does not conform to the require-ments of this specification, it should be rejected and returned tothe producer.10. Identification Marking10

36、.1 All ingots shall be properly marked for identificationwith the producers name or brand.10.2 Each bundle or skid shall be identified with the bundleweight and the producers heat number.11. Packaging11.1 Unless otherwise specified, the ingot shall be packagedto provide easy access for unloading by

37、overhead crane orforklift. Each package shall contain only one alloy unlessotherwise agreed upon.12. Keywords12.1 brightener; zinc; zinc alloys; zinc-aluminum alloy;zinc-antimony alloy; zinc master alloys; zinc metalSUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to t

38、his standard since the last issue (B 860 - 07)that may impact the use of this standard. (Approved November 1, 2008.)(1) Revisions have been made to Sections 2.3 and 6.4 to addanalytical spectrochemical methods ISO 3815-1 andISO 3815-2.Committee B02 has identified the location of selected changes to

39、this standard since the last issue (B 860 - 05)that may impact the use of this standard. (Approved June 1, 2007.)(1) Updated the Scope to indicate there are now six masteralloys of zinc-aluminum (brightener) covered by the standard.ASTM International takes no position respecting the validity of any

40、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 rights, are entirely their own responsibility.This standard is subject to revis

41、ion 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 additional standardsand should be addressed to ASTM International Headquarters. Your c

42、omments 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 ASTM Committee on Standards, at the address shown below.This standard is copyrig

43、hted 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).B860083