1、Designation: B860 09a1B860 13Standard 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 rev
2、ision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTETable 1 was corrected editorially in May 2010.1. Scope*1.1 This specification covers zinc master alloys which are used in hot dip ga
3、lvanizing for the purpose of adjusting theconcentration of certain alloying elements in the molten zinc bath. Table 1 covers the chemical composition of these materialswhich include six master alloys of zinc-aluminum (brightener) and one master alloy of zinc-antimony.ASTM Common UNSType A-1 90/10 Zn
4、/Al High Purity Z30750Type A-2 90/10 Zn/Al Low Purity Z31710Type 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 Z55710ASTM Common UNSType A-1 90/10 Zn/Al High Purity Z30750Type A-2 90/10 Zn/A
5、l Low Purity Z31710Type 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 Z557101.2 The values stated in inch-pound units are to be regarded as standard. The values given in parenthese
6、s are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to become familiar with all
7、 hazards including those identified in the appropriate Material Safety DataSheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 Th
8、e following documents of the issue in effect on date of order acceptance form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals an
9、d AlloysE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)E
10、536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys2.3 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 inductively coupled plasma optical emission spectrometry1 This specif
11、ication 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 Oct. 1, 2009Feb. 1, 2013. Published November 2009March 2013. Originally approved in 1995. Last previous edition
12、approved in 2009 asB860 - 09.B860 09a1. DOI: 10.1520/B0860-09AE01.10.1520/B0860-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary pag
13、e on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.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 th
14、e previous version. Becauseit may not 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
15、of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Terms defined in Terminology B899 shall apply unless defined otherwise in this standard.3.2 Definitions of Terms S
16、pecific to This Standard:3.2.1 brightener bar, nbrightener bar is a zinc alloy containing aluminum which is added to the galvanizing bath to adjust thealuminum content of the bath to: suppress the formation of iron-zinc alloy layers, increase the brightness and ductility of thegalvanized coating, an
17、d improve the drainage of zinc from the work as it exits the bath; also called brightener.4. Ordering Information4.1 Orders for ingots under this specification shall include the 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,
18、 type 2 block, slab or other ingot shape), if not manufacturers standard,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 of uniform quality and shal
19、l be free from harmful contamination. Theingot surface shall contain a minimum of dross and adhering foreign matter.TABLE 1 Chemical Requirements Composition, % (Range or Maximum Value)ACOLSPEC/colname=“col3“ align=“center“Type A-1 90 % Zinc10 % Aluminum (90/10 Zn/Al)High PurityType A-2 90 % Zinc10
20、% 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/Al) High PurityType A-6 96 % Zinc4 % Aluminum (96/4 Zn/Al) Low PurityType S-1 90 % Zinc10 % Antimony (90/10 Zn/Sb)UNS
21、B Type 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/AlZXXXXXType90/10Z55710UNSB Type 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
22、/4 Zn/AlZ30504Type90/10Z55710Fe 0.05 max 0.15 max 0.05 max 0.15 max 0.05 max 0.15 max 0.03Fe 0.05 max 0.15 max 0.05 max 0.15 max 0.05 max 0.15 max 0.03Pb 0.005 max 0.4 max 0.005 max 0.4 max 0.005 max 0.4 max 0.015Pb 0.005 max 0.4 max 0.005 max 0.4 max 0.005 max 0.4 max 0.015Cd 0.004 max . 0.004 max
23、. 0.004 max . 0.003Cd 0.004 max . 0.004 max . 0.004 max . 0.003Cu 0.035 max 0.5 max 0.035 max 0.5 max 0.035 max 0.5 max 0.003Cu 0.035 max 0.5 max 0.035 max 0.5 max 0.035 max 0.5 max 0.003Mg . . . . 0.06 max 0.06 maxSn 0.003 max . 0.003 max . 0.003 max . 0.01Sn 0.003 max . 0.003 max . 0.003 max . 0.0
24、1As . . . . . . 0.015As . . . . . . 0.015Al 9.510.5 9.510.5 4.55.5 4.55.5 4.0-4.5 4.0-4.5 .Al 9.510.5 9.510.5 4.55.5 4.55.5 4.0-4.5 4.0-4.5 .SbC . . . . . . 9.510.5SbC . . . . . . 9.510.5Others, Total 0.01 max 0.25 max 0.01 max 0.25 max 0.01 max 0.25 max 0.03Others, Total 0.01 max 0.25 max 0.01 max
25、0.25 max 0.01 max 0.25 max 0.03ZnD Remainder Remainder Remainder Remainder Remainder RemainderRemainderZnD Remainder Remainder Remainder Remainder Remainder RemainderRemainderA The following applies to all specified limits in this table: For purposes of determining conformance with this specificatio
26、n, 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 the rounding method of Practice E29.B UNS numbers in conformance with Practice E527.C Chemical method under developmen
27、t.D For 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 1326. Chemical Requirements6.1 LimitsThe alloys shall conform to the requirements as to chemical composition prescri
28、bed in Table 1. Conformance shallbe determined by the producer by analyzing samples taken at the time the ingots are made. If the producer has determined thechemical composition of the metal during the course of manufacture, he shall not be required to sample and analyze the finishedproduct.6.2 In c
29、ase of dispute, the following requirements shall apply:6.2.1 Number of SamplesSamples for verification of chemical composition shall be taken as follows:6.2.1.1 Not less than five ingots shall be taken at random from each car or truckload of the same alloy for sampling. Each heatin the shipment shal
30、l be represented. If the shipment is less than a carload lot, one sample ingot shall be taken for each 10 000lb (4540 kg) or fraction thereof. When it is deemed necessary, a sample may be taken from each melt of 1000 lb (454 kg) or more.6.3 Methods of SamplingSamples from ingots for determination of
31、 chemical composition shall be taken in accordance withone of the following methods:6.3.1 Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain weight of prepared sample not less than 100 g. Samplin
32、g shall be in accordance withPractice E88.6.3.2 By agreement, an optional method of sampling would be to select, at random, ingots of the same heat, melt togetherrepresentative portions of each ingot selected, and cast a disc or suitable sample from the liquid composite for spectrographic orchemical
33、 analysis.6.3.3 Samples for chemical analysis may also be in the form of a separately cast spectrographic disc specimen taken from thesame pour used to cast the ingot.6.3.4 Alternate procedures for sampling and exchange of samples shall be agreed upon between the producer and the customer.6.4 Method
34、 of AnalysisThe determination of chemical composition shall be made in accordance with suitable chemical TestMethods E536, suitable spectrochemical methods ISO3815-1 and ISO 3815-2, or other methods. In case of dispute, the resultsshould preferably be secured by Test Methods E536, or ISO 3815-1 or I
35、SO 3815-2 and shall be the basis of acceptance.7. Size and Shape7.1 Master alloys may be ordered as jumbos, blocks, slabs or other ingot configurations.7.1.1 Jumbolarge casting of zinc or zinc alloy, having through holes for chains, designed for handling by mechanicalequipment, which is also referre
36、d to as a jumbo or strip jumbo. See Specification B897 for additional details.7.1.2 Blocklarge casting of zinc or zinc alloy, having lift pockets, designed for handling by mechanical equipment, which isalso referred to as block. See Specification B897 for additional details.7.1.3 Slabsmaller casting
37、 of zinc or zinc alloy, designed for manual handling. A slab usually weighs about 55 lb (25 kg) butmay weigh any where from 40 to 60 lb (18 to 27 kg). Slabs are usually shipped in strapped bundles weighing about 2200 lb (onemetric ton).7.1.4 Other shapes and sizes as may be agreed upon between the p
38、roducer and the customer may be cast to the chemicalrequirements of this specification.8. Source Inspection8.1 If the purchaser desires that his representative inspect or witness the inspection and testing of the product prior to shipment,such agreement shall be made by the purchaser and producer or
39、 supplier as part of the contract or purchase order.8.2 When such inspection or witness of inspection and testing is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfy him that the product meets the requirements of this specification.
40、Inspection and tests shall be conducted in such a manner that there is no unnecessary interference with the producers operations.9. Rejection and Rehearing9.1 Material that fails to conform to the requirements of this specification may be rejected. Rejection should be reported to theproducer or supp
41、lier promptly and in writing. In case of dissatisfaction with the results of the test, the producer or supplier maymake claim for a rehearing. If the rehearing establishes that the material does not conform to the requirements of this specification,it should be rejected and returned to the producer.
42、10. Identification Marking10.1 All ingots shall be properly marked for identification with the producers name or brand.10.2 Each bundle or skid shall be identified with the bundle weight and the producers heat number. Corrected editorially.B860 13311. Packaging11.1 Unless otherwise specified, the in
43、got shall be packaged to provide easy access for unloading by overhead crane or forklift.Each package shall contain only one alloy unless otherwise agreed upon.12. Keywords12.1 brightener; zinc; zinc alloys; zinc-aluminum alloy; zinc-antimony alloy; zinc master alloys; zinc metalSUMMARY OF CHANGESCo
44、mmittee B02 has identified the location of selected changes to this standard since the last issue(B860 - 09B860 09a1) that may impact the use of this standard. (Approved OctoberFebruary 1, 2009.)2013.)(1) The reference to Test Methods UNS numbers were added.E47 as a method to analyze for tin only ha
45、s been removed.Committee B02 has identified the location of selected changes to this standard since the last issue (B860 - 08)that may impact the use of this standard. (Approved April 15, 2009.)(1) A definition of the term brightener bar has been added to Specification B860.Committee B02 has identif
46、ied the location of selected changes to this standard since the last issue (B860 - 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 add analytical spectrochemical methods ISO 3815-1 and ISO 3815-2.ASTM International take
47、s 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 of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own res
48、ponsibility.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 withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addresse
49、d 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 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 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by
