1、Designation: B 852 07Standard Specification forContinuous Galvanizing Grade (CGG) Zinc Alloys for Hot-Dip Galvanizing of Sheet Steel1This standard is issued under the fixed designation B 852; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r
2、evision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 specifica
3、tion 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 gr
4、ades made from secondary zinc arefound in footnote C.1.2 Other alloy compositions not included in B 852, 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 the standard. The values given in
5、parentheses are forinformation only.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 hazards including those identified in the appropriateMaterial Safety Data Shee
6、t (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 Standards:2B 897 Specification for the Configuration of Zinc and ZincAlloy Jum
7、bo and Block IngotB 899 Terminology Relating to Non-ferrous Metals andAlloysE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 527 Practice for
8、 Numbering Metals and Alloys (UNS)E 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloysE 634 Practice for Sampling of Zinc and Zinc Alloys forOptical Emission Spectrometric Analysis3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.4. Ordering Information4.1 Orders
9、 for CGG alloy under this specification shallinclude the following information:4.1.1 Number of ASTM standard, including year of issue,4.1.2 Quantity (weight),4.1.3 Name of material (CGG),4.1.4 Size and shape (Section 7), and1This specification is under the jurisdiction of ASTM Committee B02 onNonfer
10、rous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved May 1, 2007. Published May 2007. Originallyapproved in 1994. Last previous edition approved in 2001 as B 852 - 01.2For referenced ASTM standards, visit the ASTM website, www.ast
11、m.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsGradeA(UNS)Composition,%Nominal RangeBAluminum Lead Aluminum LeadCZ80310 0.25 . 0.22 to 0.28 0.
12、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 0.007 maxZ80810 0.75 . 0.67 to 0.83 0.007 maxZ80910 1.00 . 0.90 to 1.10 0.007 maxImpurities, %: IronC0.0075 maxCadmi
13、um 0.01 maxCopper 0.01 maxOther Elements total of 0.01 maxZinc: balance by differenceAUNS numbers in conformance with Practice E 527.BFor purposes of determining conformance with this specification, an observedvalue obtained from analysis shall be rounded to the nearest unit in the lastright-hand pl
14、ace 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 CGG alloys produced from secondary zinc.1*A Summary of Changes section appears at the end of this standard.Copyri
15、ght ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.5 Grade (see Table 1).5. Materials and Manufacture5.1 The producer shall use care that each shipment of CGGalloy be as uniform in quality as possible.6. Chemical Composition6.1 CGG alloy s
16、hall conform to the requirements of Table 1as determined by chemical analysis by the producer on samplestaken at his plant (see Section 9).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 Specific
17、ation B 897.7.1.2 Jumboslarge castings of zinc or zinc alloy designedfor 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-sio
18、ns, and location of holes or openings shall be as agreed uponbetween 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
19、 (18 to 27 kg). Slabs are usuallyshipped in strapped bundles weighing 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 requ
20、irements (Table 1) of this specification.8. Appearance8.1 CGG alloy 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 During CastingSamples shall be taken f
21、romthe pour during the casting of CGG alloys and shall be cast aspins or discs according to Practice E 634 for spectrochemicalanalyses. A sample shall be taken at least every 18 metric tons(18 000 kg). Unless otherwise agreed upon between the pro-ducer and the customer, chemical analyses shall be de
22、terminedfrom these samples (see Section 6).9.2 Sampling of SlabsWhen CGG alloy slabs must besampled, sampling shall be by drilling or sawing.9.2.1 Selection of PortionA portion representative of thelot shall be selected at random for the sample. From lotscontaining at least 60 000 lb (27 200 kg), on
23、e slab shall betaken from every 10 000 lb (4530 kg). For smaller lots, fiveslabs shall be taken.9.2.2 Preparation of SampleEach slab shall be cleanedthoroughly to rid the surface of extraneous material and drilledor sawed without lubricant in accordance with 9.2.3 or 9.2.4.Adventitious iron with whi
24、ch the sample may have beencontaminated from the drill or the saw shall be removed witha strong magnet.9.2.3 DrillingTwo holes shall be drilled, preferably fromthe bottom or brand side of each slab, at two points locatedalong the one diagonal of the slab so that each point is halfwaybetween the cent
25、er and one extremity of the diagonal. If twoholes do not yield a sample weighing at least 1012 oz (300 g),a third hole shall be drilled at the center of each slab. Each holeshall be bored completely through the slab, care being taken toavoid starting the drill in a depression, and to adjust the feed
26、 togive drillings 0.010 to 0.020 in. (0.25 to 0.51 mm) in thickness.The drill shall preferably be one twisted from flat stock. Thedrill diameter shall be516 in. (8 mm). All the drillings shalleither be cut with clean shears or broken into pieces of not over12 in. (13 mm) in length and mixed thorough
27、ly.9.2.4 SawingTwo cuts shall be made completely acrossand through the slab from one long side to another with aheat-treated, high-speed saw. Each cut shall be sufficient togive a total sample weight of at least 1012 oz (300 g), and allcuttings from all the slabs shall be mixed thoroughly.9.2.5 Stor
28、ageThe sample shall be split into three equalparts, each of which shall be placed in a sealed package, onefor the producer, one for the customer and, if necessary, one fora referee. Tight leakproof paper sample envelopes or cardboardcartons shall be used to hold the samples.9.3 Sampling of jumbosRep
29、resentative samples cannot beobtained from large castings (except for remelting the entireingot in a separate furnace and then taking a sample) becauseof the potential for segregation. Therefore, alloy cast in thejumbo form shall be sampled from the pour.9.4 Matters of sampling and sample preparatio
30、n not coveredby this specification shall be in accordance with Practice E88.9.5 Samples held at the producers plant shall be retainedfor not less than 90 days.9.6 Unless otherwise provided in this section, proceduresfor sampling, storing, and exchange of samples shall be asagreed upon between the pr
31、oducer and the customer.10. Methods of Chemical Analyses10.1 The chemical compositions in Table 1 shall be deter-mined by the producer, who shall use methods of analysispublished in Test Methods E 536 or any spectrographic meth-ods that may be the usual practice of the producer. In case ofdispute, t
32、he referee shall use only those methods of analysispublished in Test Methods E 536 unless another method hasbeen agreed upon between the producer and the customer.10.1.1 Samples obtained during casting (9.1) shall be ana-lyzed individually and the average of the individual determi-nations for the sa
33、mples from the lot shall be reported as theanalysis of the lot. The average shall conform to the chemicalrequirements of Table 1.10.1.2 Samples obtained by drilling or sawing shall beanalyzed and reported individually for each lot. Each analysisshall conform to the chemical requirements of Table 1.1
34、0.2 The customer may request that his samples accompanythe shipment or be transmitted by other means. He may, at hisdiscretion, analyze such samples. In the case of a dispute, theB852072producer shall send the sample retained for referee to a refereeagreed upon between the producer and the customer
35、(see14.1.1).11. Rejection and Rehearing11.1 CGG alloy supplied under this specification mustsatisfy the chemical requirements of Table 1. The customermay reject any material that does not conform to theserequirements and, if rejected, the producer shall replace it. Thefull weight of the shipment sha
36、ll be returned to the producerunless other provisions are agreed upon between the producerand the customer.12. Certification12.1 A certificate shall be provided by the producer with thefollowing information:12.1.1 The weight of the shipment,12.1.2 The chemical composition of each production lot orpa
37、rtial lot within the shipment,12.1.3 A statement that the material was produced, sampledand analyzed in accordance with this specification, and12.1.4 A statement that the requirements of this specifica-tion have been met.13. Claims13.1 Claims shall be made in writing to the producer withinthirty (30
38、) days of receipt of material at the customers plant.If the claim is based on the results of the customers chemicalanalyses, those results shall be included in the claim.13.2 When CGG alloy satisfies the chemical and physicalrequirements of this specification, it shall not be condemnedfor defects in
39、 the coating of zinc-coated products in which itwas used.14. Investigation of Claims14.1 If a claim has been made in accord with Section 13, theproducer shall respond to the customer within one week ofreceipt of the claim. The producer shall at that time proposeeither to satisfy the claim or to send
40、 his representative to thecustomers plant within one week for investigation and settle-ment of the claim.14.1.1 If a claim is made that the chemical analysesrequirements of Table 1 have not been met, the parties mayelect to send that portion of the sample retained by the producerfor referee purposes
41、 to a referee agreed upon between theproducer and the customer. The determination of the refereeshall be binding.14.1.2 If a claim is made that physical defects exist, theproducers representative shall inspect the pieces that areclaimed to be defective. If after such inspection agreementcannot be re
42、ached, a referee agreed upon between the producerand the customer shall be called to examine those pieces saidto be defective. The determination of the referee shall bebinding.15. Settlement of Claims15.1 The expenses of the producers representative and thereferee shall be paid by the loser or in pr
43、oportion to concessionin case of compromise.16. Product Marking16.1 The producers name or a brand name by which theproducer can be identified shall be cast or stamped on eachjumbo or slab.17. Keywords17.1 CGG alloy; Continuous Galvanizing Grade Zinc; zinc;zinc alloy; zinc metalSUMMARY OF CHANGESComm
44、ittee B02 has identified the location of selected changes to this standard since the last issue (B 853 - 01)that may impact the use of this standard. (Approved May 1, 2007.)(1) A reference to Specification B 897 to specify the size andconfiguration of jumbo and block ingots was added.ASTM Internatio
45、nal 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 of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their
46、 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 withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be
47、 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 comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards
48、, 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).B852073
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