1、Designation: B 860 07Standard 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 (e) 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
3、certain 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 Z31710T
4、ype 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 either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system
5、 may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 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 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 I
8、ngotB 899 Terminology Relating to Non-ferrous Metals andAlloysE29 Practice for Using Significant 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 Det
9、ermination of Chemical CompositionE 527 Practice for Numbering Metals and Alloys (UNS)E 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloys3. Terminology3.1 Terms defined in Terminology B 899 shall apply unlessdefined otherwise in this standard.4. Ordering Information4.1 Orders for ingots u
10、nder 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 (jumbo, 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
11、 (see Section 8), and4.1.6 Marking (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 Requirement
12、s Chemical Requirements6.1 LimitsThe alloys shall conform 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
13、 during thecourse of manufacture, he shall not be required to sample andanalyze the finished product.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、June 1, 2007. Published July 2007. Originally approvedin 1995. Last previous edition approved in 2005 as B 860 - 05.2For 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
15、the standards Document Summary page onthe ASTM website.3Withdrawn.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.6.2 In case of dispute, the following requirements sh
16、allapply: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 same alloy for sampling.Each heat in the shipment shall be represented. If the shipmentis less than a
17、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 of SamplingSamples from ingots for deter-mination of chemical composition shall be taken in accordance
18、with 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 weight of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.6.3.2 By a
19、greement, 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 liquid composite for spectrographic orchemical analysis.6.3.3 Samples for chemical analysis may also
20、 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 between the producer and thecustomer.6.4 Method of AnalysisThe determination of chemicalcomposition shal
21、l be made in accordance with suitable chemi-cal (Test Methods E 536 or E47(tin only), or other methods.In case of dispute, the results secured by Test Methods E 536shall be the basis of acceptance.7. Size and Shape7.1 Master alloys may be ordered as jumbos, blocks, slabsor other ingot configurations
22、.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 jumbo or strip jumbo.See Specification B 897 for additional details.7.1.2 Blocklarge casting of zinc or zinc alloy, having liftpockets, design
23、ed 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 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). Sla
24、bsare 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 customer may be cast to thechemical requirements of this specification.8. Source Inspection8.1 If the purchaser desires that his representat
25、ive inspect orwitness the inspection and testing of the product prior toshipment, such agreement shall be made by the 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 shal
26、l afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests shall be conducted in such a mannerthat there is no unnecessary interference with the producersoperations.TABLE 1 Chemical Requirements C
27、omposition, % (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 PurityType A-5 96 % Zinc4 % Aluminum (96/4 Zn
28、/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/AlZXXXXXType A-696/4 Zn/AlZXXXXXType S-190/10 Zn/SbZ55710Fe 0.05 ma
29、x 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 maxMg . . . . 0.06 max 0.06 maxSn 0.003 max . 0.003 max . 0.003 max
30、 . 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 following applies to all specified limit
31、s 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 value, in accordance with the rounding method of Practice E29.BUN
32、S 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 elementslisted above.B8600729. Rejection and Rehearing9.1 Materia
33、l that fails to conform to the requirements of thisspecification may be rejected. Rejection should be reported 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 rehearingestablish
34、es that the material does not conform to the require-ments of this specification, it should be rejected and returned 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
35、the bundleweight and the producers heat number.11. Packaging11.1 Unless otherwise specified, the ingot shall be 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 all
36、oys; zinc-aluminum alloy;zinc-antimony alloy; zinc master alloys; zinc metalSUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to 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 ind
37、icate there are now six masteralloys of zinc-aluminum (brightener) covered by the standard.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination
38、 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 years andif not revised, either reapproved or withdraw
39、n. 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 committee, which you may attend. If you feel that your co
40、mments 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 serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B860073
