1、Designation: B852 12Standard Specification forContinuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel1This standard is issued under the fixed designation B852; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev
2、ision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specificatio
3、n covers grades of zinc alloys, com-monly known as Continuous Galvanizing Grade (CGG) alloysthat contain aluminum, or aluminum and lead and that are usedin continuous hot-dip galvanizing of steel sheet. The compo-sitions for CGG grades made from primary zinc are shown inTable 1. Exceptions for grade
4、s made from secondary zinc arefound in footnote C.1.2 Other alloy compositions not included in B852, and asmay be agreed upon between the producer and the user, may beused for continuous galvanizing.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parenthe
5、ses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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
6、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 ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM
7、Standards:2B897 Specification for Configuration of Zinc and ZincAlloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals andAlloysB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine
8、 Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals 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 ZincAlloysE634 Practice fo
9、r Sampling of Zinc and Zinc Alloys bySpark Atomic Emission Spectrometry2.2 ISO Standards:3ISO 3815-1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometry1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the dire
10、ct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved May 1, 2012. Published August 2012. Originallyapproved in 1994. Last previous edition approved in 2008 as B852 - 08. DOI:10.1520/B0852-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orconta
11、ct ASTM Customer Service at serviceastm.org. For Annual Book of 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.TABLE 1 Che
12、mical RequirementsGradeA(UNS)Composition,%Nominal RangeBAluminum Lead Aluminum LeadCZ80310 0.25 . 0.22 to 0.28 0.007 maxZ80411 0.35 . 0.31 to 0.39 0.007 maxZ80511 0.45 . 0.40 to 0.50 0.007 maxZ80531 0.45 0.02 0.40 to 0.50 0.01 to 0.03Z80610 0.55 . 0.49 to 0.61 0.007 maxZ80710 0.65 . 0.58 to 0.72 0.0
13、07 maxZ80810 0.75 . 0.67 to 0.83 0.007 maxZ80910 1.00 . 0.90 to 1.10 0.007 maxImpurities, %: IronC0.0075 maxCadmium 0.01 maxCopper 0.01 maxOther Elements total of 0.01 maxZinc: balance by differenceAUNS numbers in conformance with Practice E527.BFor purposes of determining conformance with this spec
14、ification, an observedvalue obtained from analysis shall be rounded to the nearest unit in the lastright-hand place of figures used in expressing the limiting value, in accordancewith the rounding method of Practice E29.CLead and Iron levels of 0.01 % max and 0.01 % max respectively are allowedfor C
15、GG alloys produced from secondary zinc.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.ISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma op
16、tical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.4. Ordering Information4.1 Orders for zinc alloy ingot under this specification shallinclude information as specified in Specification B949, Section4.5. Materials and Manufacture5.1 The producer sh
17、all use care that each shipment of CGGalloy be as uniform in quality as possible.6. Chemical Requirements6.1 CGG alloy shall conform to the requirements of Table 1as determined by chemical analysis by the producer on samplestaken at his plant (see Section 9).6.2 Chemical requirement procedures shall
18、 be in compli-ance with the provisions of Specification B949, Section 5.2.7. Size and Shape7.1 CGG alloy may be ordered as either jumbos, blocks, orslabs.7.1.1 CGG alloy metal may be ordered in jumbos or blocks,as specified in Specification B897.7.1.2 Jumboslarge castings of zinc or zinc alloy desig
19、nedfor handling by mechanical equipment. A jumbo usuallyweighs about 2400 lb (1087 kg). Jumbo shapes may vary,depending on the producers practice, and may be referred to asstrip jumbos or as block jumbos. The nominal weight, dimen-sions, and location of holes or openings shall be as agreed uponbetwe
20、en the producer and the customer.7.1.3 Slabssmaller castings of zinc or zinc alloy designedfor manual handling, but often handled by mechanical equip-ment.Aslab usually weighs about 55 lb (25 kg) but may weighanywhere from 40 to 60 lb (18 to 27 kg). Slabs are usuallyshipped in strapped bundles weigh
21、ing about 2200 lb (onemetric ton). Other bundle weights may be as agreed uponbetween the producer and the customer.7.1.4 Other shapes and sizes as may be agreed uponbetween the producer and the customer may be cast to thechemical requirements (Table 1) of this specification.8. Appearance8.1 CGG allo
22、y castings (jumbos and slabs) shall be free ofundue surface oxide, adhering foreign matter, and any “flash”that would interfere with handling and use.9. Sampling for Chemical Analysis9.1 Sampling procedures shall be in compliance with theprovisions of Specification B949, Section 6.10. Methods of Che
23、mical Analysis10.1 The determination of chemical composition shall bemade in accordance with Test Methods E536,orISO 3815-1,or ISO 3815-2 or other methods. In case of dispute, the resultssecured by Test Methods E536,orISO 3815-1,orISO 3815-2shall be the basis of acceptance.NOTE 1Test Methods E536 is
24、 directly applicable, in an unmodifiedform, only to alloys 3, 5, and 7. ISO 3815-1 and ISO 3815-2 are genericmethods applied to zinc and zinc alloys. Each of the methods may bemodified and formatted for the alloy to be assayed. An experiencedchemist, using suitable and/or traceable standards along w
25、ith valid qualityassurance techniques, will be able to perform and validate the methodsand demonstrate acceptable precision and accuracy.11. Rejection and Rehearing11.1 Claims to be considered in accordance with the provi-sions of Specification B949, Section 8.12. Investigation of Claims12.1 Claims
26、shall be investigated in accordance with theprovisions of Specification B949, Section 8.13. Settlement of Claims13.1 Claims shall be settled in accordance with the provi-sions of Specification B949, Section 8.14. Product Identification Marking and Packaging14.1 Each slab, block, jumbo or ingot shall
27、 be marked foridentification in accordance with the provisions of Specifica-tion B949, Section 10.15. Certification15.1 A certificate shall be provided by the producer with thefollowing information:15.1.1 The weight of shipment,15.1.2 The chemical composition of each production lot orpartial lot wit
28、hin the shipment.15.1.3 A statement that the material was produced, sampledand analyzed in accordance with this specification, and15.1.4 A statement that the requirements of this specifica-tion have been met.16. Keywords16.1 CGG alloy; Continuous Galvanizing Grade Zinc; zinc;zinc alloy; zinc metalB8
29、52 122SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue (B852 - 08)that may impact the use of this standard. (Approved May 1, 2012.)(1) Revisions have been made to Sections 2, 4, 9, 10, 11, 12,13, and 14 to reference Specification B
30、949 and delete certainportions of these sections formerly a part of this standard.(2) The titles of Sections 6, 12, 13, 14, 15, and 16 have beenrevised to be in agreement with a standard format for Subcom-mittee B02.04 standards.ASTM International takes no position respecting the validity of any pat
31、ent 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 responsibility.This standard is subject to revision
32、 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 addressed to ASTM International Headquarters. Your comm
33、ents 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 copyrighte
34、d 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B852 123
