ASTM B860-2016 Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing《热浸镀锌用锌母合金的标准规格》.pdf

1、Designation: B860 16Standard 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-loysB949 Specification for Ge

9、neral 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 Metals and Alloys inCast Form for Dete

10、rmination 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 optical emission spectrometryISO 381

11、5-2 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 brightener bar, nbrightener bar is a z

12、inc 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 the work as it exits the bath; also

13、called brightener.4. Ordering Information4.1 Orders for ingots under this specification shall includethe following information: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

14、Current edition approved May 1, 2016. Published July 2016. Originally approvedin 1995. Last previous edition approved in 2015 as B860 15. DOI: 10.1520/B0860-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book o

15、f ASTMStandards volume 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 standardCopyrigh

16、t ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.1 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 manufacturersstandard,4.1.4 Specification num

17、ber 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 ordered as jumbos, blocks, slabsor other ingot configuratio

18、ns.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 Blocklarge casting of zinc or zinc alloy, having liftpockets, desig

19、ned 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)but may weigh any where from 40 to 60 lb (18 to 27 kg). Sla

20、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 See Specification B949.9. Rejection and Rehea

21、ring9.1 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 Composition, % (Range or

22、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/Al) High PurityType A-6

23、 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 0.15 max 0.05 max 0.15

24、 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 . 0.01 maxAs . . . . . .

25、 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 in this table: For purp

26、oses 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 numbers in conformance

27、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 162SUMMARY OF CHANGESCommittee B02 has identified the location of

28、 selected changes to this standard since the last issue (B86015)that may impact the use of this standard. (Approved May 1, 2016.)(1) References to Specification B949 were added and sectionnumbers were eliminated.Committee B02 has identified the location of selected changes to this standard since the

29、 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 connection with any item mentionedin this standard. Users of this standard a

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