1、Designation: B860 15Standard Specification forZinc Master Alloys for Use in Hot Dip Galvanizing1This standard is issued under the fixed designation B860; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、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 cer
3、tain 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 Z31710Type
4、 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 Z31520Type A-6 96/4 Zn/Al Low Purity Z30504Type S-1 90/10 Zn/Sb Z55710NOTE 1The master alloys in Specification B860 are intended to beused primarily in hot-dip galvanizing to adjust the concentrati
5、on of certainelements in a molten zinc bath, and differ from the zinc-aluminum alloysin Specification B997 which are intended to be used primarily in moltenzinc-aluminum.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversio
6、ns 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 concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those ident
7、ified in the appropriateSafety Data Sheet (SDS) for this product/material as providedby the manufacturer, to establish appropriate safety and healthpractices, and determine the applicability of regulatory limi-tations prior to use.2. Referenced Documents2.1 The following documents of the issue in ef
8、fect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B897 Specification for Configuration of Zinc and Zinc AlloyJumbo, Block, Half Block, and Slab IngotB899 Terminology Relating to Non-ferrous Metals and Al-loysB997 Specification for Zi
9、nc-Aluminum Alloys in IngotForm for Hot-Dip CoatingsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and All
10、oys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 ISO 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 opti
11、cal emission spectrometry3. Terminology3.1 Terms defined in Terminology B899 shall apply unlessdefined otherwise in this standard.3.2 Definitions of Terms Specific to This Standard:3.2.1 brightener bar, nbrightener bar is a zinc alloycontaining aluminum which is added to the galvanizing bath toadjus
12、t the aluminum content of the bath to: suppress theformation of iron-zinc alloy layers, increase the brightness andductility of the galvanized coating, and improve the drainage ofzinc from the work as it exits the bath; also called brightener.4. Ordering Information4.1 Orders for ingots under this s
13、pecification shall includethe following information:4.1.1 Quantity, lb,4.1.2 Alloy type (see 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
14、 Oct. 1, 2015. Published October 2015. Originallyapproved in 1995. Last previous edition approved in 2013 as B860 13. DOI:10.1520/B0860-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
15、 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:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,
16、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.3 Size and type of ingot (jumbo, type 1 block, type 2block, slab or other ingot shape), if not manufacturersstandard,4.1.4 Specification number and year date,4.1.5 Source inspection (see Section 8), and4.1.6 Mark
17、ing (see Section 10).5. Materials and Manufacture5.1 The material covered by this specification shall be ofuniform quality and shall be free from harmful contamination.The ingot surface shall contain a minimum of dross andadhering foreign matter.6. Chemical Requirements6.1 LimitsThe alloys shall con
18、form to the requirements asto chemical composition prescribed in Table 1. Conformanceshall be determined by the producer 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 req
19、uired to sample andanalyze the finished product.6.2 In case of dispute, the following requirements shallapply:6.2.1 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 s
20、ame alloy for sampling.Each heat in the shipment shall be represented. If the shipmentis less than a carload lot, one 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 o
21、f SamplingSamples from ingots for deter-mination of chemical composition shall be taken in accordancewith one of the 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 weig
22、ht of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.6.3.2 By agreement, an optional 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
23、 liquid composite for spectrographic orchemical analysis.6.3.3 Samples for chemical analysis may also be in the formof 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 bet
24、ween the producer and thecustomer.6.4 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal Test Methods E536, suitable spectrochemical methodsISO3815-1 and ISO 3815-2, or other methods. In case ofdispute, the results should preferably be secu
25、red by TestMethods E536, or ISO 3815-1 or ISO 3815-2 and shall be thebasis of acceptance.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 me
26、chanicalTABLE 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 % Aluminum (95/5 Zn/Al) Low Purity
27、Type 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/AlZ31520Type A-696/4 Zn/AlZ3
28、0504Type 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 0.005 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 maxMg . . . . 0.06 max 0.06 m
29、axSn 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 Remainder RemainderAThe fo
30、llowing applies to all specified limits in this table: For purposes of determining conformance with this specification, an observed value obtained from analysis shallbe rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with t
31、he rounding method of Practice E29.BUNS numbers in conformance with Practice E527.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 elements listedabove.B860 15
32、2equipment, which is also referred to as a jumbo or strip jumbo.See Specification B897 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 B897 foradditional det
33、ails.7.1.3 Slabsmaller casting of zinc or zinc 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
34、be agreed uponbetween the producer and the 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
35、 purchaser andproducer or supplier as part of the contract or purchase order.8.2 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
36、 of this specifica-tion. Inspection and tests shall 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
37、tothe producer or supplier promptly and in writing. 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 ret
38、urned tothe producer.10. Identification Marking10.1 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
39、 packagedto provide easy access for unloading by 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
40、 identified the location of selected changes to this standard since the last issue (B86013)that may impact the use of this standard. (Approved October 1, 2015.)(1) A note was added to Section 1, Scope.ASTM International takes no position respecting the validity of any patent rights asserted in conne
41、ction 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 revision at any time by the responsi
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43、nsideration 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 copyrighted by ASTM International, 100
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