1、Designation: B860 17Standard 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, health andenvironmental practices, and determine the applicability ofregulatory limitations prior to use.1.4 This international standard was developed in accor-d
8、ance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The fo
9、llowing documents of the issue in effect 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
10、and Al-loysB949 Specification for General Requirements for Zinc andZinc Alloy ProductsB997 Specification for Zinc-Aluminum Alloys in IngotForm for Hot-Dip CoatingsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Me
11、tals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys 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
12、optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical 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 br
13、ightener bar, nbrightener bar is a zinc alloycontaining aluminum which is added to the galvanizing bath toadjust 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
14、the work as it exits the bath; also called brightener.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 June 1, 2017. Published September 2017. Origina
15、llyapproved in 1995. Last previous edition approved in 2016 as B860 16. DOI:10.1520/B0860-17.2For 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
16、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, 100 Barr Harbor Drive, PO Box C700, West Consh
17、ohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Org
18、anization Technical Barriers to Trade (TBT) Committee.14. 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 (jumbo, type 1 block, type 2block, slab or other ingot sh
19、ape), if not manufacturersstandard,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 See Specification B949.6. Chemical Requirements6.1 See Specification B949.7. Size and Shape7.1 Master alloys may be o
20、rdered 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 jumbo or strip jumbo.See Specification B897 for additional details.7.1.2 Blocklarg
21、e 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 details.7.1.3 Slabsmaller casting of zinc or zinc alloy, designedfor manual handling. A slab usually weighs about 55 lb (25 kg)b
22、ut 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 Brightener Barsmaller casting of zinc or zinc alloy,designed for manual handling. A bar usually weighs about 20lb (9 kg) but may weigh anywhere from 18 to
23、22 lb (8 to 10kg). Bars are usually shipped in strapped bundles weighingabout 2200 lb (one metric ton).7.1.5 Other shapes and sized as may be agreed uponbetween the producer and the customer may be cast to thechemical requirements of this specification.8. Source Inspection8.1 See Specification B949.
24、9. Rejection and Rehearing9.1 See Specification B949.10. Identification Marking10.1 See Specification B949.11. Packaging11.1 See Specification B949.12. Keywords12.1 brightener; zinc; zinc alloys; zinc-aluminum alloy;zinc-antimony alloy; zinc master alloys; zinc metalTABLE 1 Chemical Requirements Com
25、position, % (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/A
26、l) 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/AlZ30504Type S-190/10 Zn/SbZ55710Fe 0.05 max
27、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 maxSn 0.003 max . 0.003 max . 0.003 max .
28、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 limits i
29、n 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 the rounding method of Practice E29.BUNS n
30、umbers 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 172SUMMARY OF CHANGESCommittee B02 has iden
31、tified the location of selected changes to this standard since the last issue (B86016)that may impact the use of this standard. (Approved June 1, 2017.)(1) The bar ingot was added in section 7.1.4.Committee B02 has identified the location of selected changes to this standard since the last issue (B8
32、6015)that may impact the use of this standard. (Approved May 1, 2016.)(1) References to Specification B949 were added and sectionnumbers were eliminated.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. U
33、sers 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 responsible technical committee and must be reviewed eve
34、ry 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 comments will receive careful consideration at a meeting of theresponsible techn
35、ical 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 Conshohock
36、en, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 173
