1、Designation: B 240 071Standard Specification forZinc and Zinc-Aluminum (ZA) Alloys in Ingot Form forFoundry and Die Castings1This standard is issued under the fixed designation B 240; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 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.1NOTESummary of Changes was corrected editorially in March 2009.1. Scope*1.1 This specification covers commercial zin
3、c and zinc-aluminum (ZA) alloys in ingot form for remelting for themanufacture of pressure die castings, foundry castings andcontinuous cast bar stock as designated and specified in Table1. Seven alloy compositions are specified, designated asfollows:Common Traditional ASTMAUNSAAlloy 3 Zamak 3 AG 40
4、A Z33521Alloy 7 Zamak 7 AG 40B Z33522Alloy 5 Zamak 5 AC 41A Z35530Alloy 2 Zamak 2 AC 43A Z35540ZA-8 ZA-8 . Z35635ZA-12 ZA-12 . Z35630ZA-27 ZA-27 . Z35840_ASee Table 1, footnote B.1.2 Zinc alloys Z33521, Z33522, Z35530, and Z35540 areused primarily for remelting in the manufacture of pressure diecast
5、ings. Zinc-aluminum alloys Z35635, Z35630, and Z35840are used for remelting in the manufacture of both foundry andpressure die castings. Castings made from these ingots arespecified in Specification B86, Standard Specification for Zincand Zinc-Aluminum Alloys for Foundry and Die Castings.1.3 The val
6、ues stated in inch-pound units are to be regardedas standard.1.4 Systems of nomenclature used to designate zinc andzinc-aluminum (ZA) alloys used for casting are described inAppendix X1.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is th
7、eresponsibility of the user of this standard to become familiarwith all 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 applicabilit
8、y ofregulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on dataof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B86 Specification for Zinc and Zinc-Aluminum (ZA)AlloyFoundry and Die Cast
9、ingsB 275 Practice for Codification of Certain Nonferrous Met-als and Alloys, Cast and WroughtB 897 Specification for the Configuration of Zinc and ZincAlloy Jumbo and Block IngotB 899 Terminology Relating to Non-ferrous Metals andAlloysB 908 Practice for the Use of Color Codes for Zinc CastingAlloy
10、 IngotE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys3E88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 527 Practice for Num
11、bering Metals and Alloys in theUnified Numbering System (UNS)E 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloysE 634 Practice for Sampling of Zinc and Zinc Alloys forOptical Emission Spectrometric Analysis2.3 Other ASTM Document:1This specification is under the jurisdiction of ASTM Commi
12、ttee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved July 1, 2007. Published August 2007. Originallyapproved in 1949. Last previous edition approved in 2006 as B 240 - 06.2For referenced ASTM standards, visit the
13、ASTM website, www.astm.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.3Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internatio
14、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Methods for Emission Spectrochemical Analysis42.4 ISO Standard5ISO 301 Zinc Alloy Ingots Intended for CastingISO 38151 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometry.ISO 38
15、152 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission spectrometry.3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 Definitions of Terms Specific to This Standard:3.2.1 continuous casting, na casting technique in which acast is contin
16、uously withdrawn through the bottom of the moldas it solidifies, so that its length is not determined by molddimensions; used chiefly to produce semifinished mill productssuch as billets, blooms, ingots, slabs and tubes; also known asconcast.3.2.2 die casting, na casting process in which moltenmetal
17、 is injected under high velocity and pressure into a metaldie and solidified, also a product produced by such a process.Alternately known as pressure die casting.4. Ordering Information4.1 Orders for ingot under this specification shall includethe following information:4.1.1 Quantity in pounds,4.1.2
18、 Alloy (Table 1),4.1.3 Size, if not manufacturers standard (see Section 7),4.1.4 Specification number and date,4.1.5 Source inspection (Section 10),4.1.6 Marking (Section 12), and4.1.7 Whether certification is required (Section 13).5. Materials and Manufacturer5.1 The material covered by this specif
19、ication shall be ofuniform quality and reasonably free from dross, adheringforeign matter, and surface oxide.6. Chemical Requirements6.1 The ingots shall conform to the requirements as tochemical composition prescribed in Table 1. Conformanceshall be determined by the manufacturer by analyzing sampl
20、estaken at the time the ingots are poured or samples taken fromthe ingots. Unless otherwise agreed in the contact or purchaseorder, sampling procedure will be the manufacturers choice.7. Ingot Sizes and Shapes7.1 Zinc casting alloy ingots are typically supplied in ingotbundles weighing 1700 to 2400
21、lb.7.2 Ingots and bundles vary in size and weight depending onthe alloy and supplier.7.2.1 Standard ingots have a nominal weight in the range of17 to 24 lb. and are generally 24 to 26 in. long.7.2.2 Margash bars or ingots come in two sizes with anominal weight in the range of either 12 to 14 lb. or
22、20 to 24lb.7.3 Zinc casting alloy ingot may be ordered in jumbos orblocks, as specified in Specification B 897.7.4 Zinc casting alloy ingot may also be ordered in othershapes.4Methods for Emission Spectrochemical Analysis: General Practices, Nomen-clature, Standard Methods, Proposed Methods, Suggest
23、ed Methods, ASTM Inter-national, 1982 .5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 Chemical and North American Color Code RequirementsAlloy 3A,B,C,DAlloy 7A,B,C,DAlloy 5A,B,C,DAlloy 2A,B,C,DZA-8B,C,EZA-12B,C,E
24、ZA-27B,C,EZamak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27(AG40A) (AG40B) (AC41A) (AC43A)Z33521 Z33522 Z35530 Z35540 Z35635 Z35630 Z35840Color CodeFNone Brown Black Green Blue Orange PurpleElementAluminum 3.9-4.3 3.9-4.3 3.9-4.3 3.9-4.3 8.2-8.8 10.8-11.5 25.5-28.0Magnesium 0.03-0.06 0.010-0.020 0.03
25、-0.06 0.025-0.05 0.02-0.03 0.02-0.03 0.012-0.020Copper 0.10 max 0.10 max 0.7-1.1 2.7-3.3 0.9-1.3 0.5-1.2 2.0-2.5Iron, Max 0.035 0.075 0.035 0.035 0.035 0.05 0.07Lead, Max 0.0040 0.0030 0.0040 0.0040 0.005 0.005 0.005Cadmium, Max 0.0030 0.0020 0.0030 0.0030 0.005 0.005 0.005Tin, Max 0.0015 0.0010 0.0
26、015 0.0015 0.002 0.002 0.002Nickel - - - 0.005-0.020 - - - - - - - - - - - - - - -ZincGRemainder Remainder Remainder Remainder Remainder Remainder RemainderAZinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in amounts of up to 0.02, 0.02, 0.035 and 0.05 %, respect
27、ively. No harmful effectshave ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements, except that nickelanalysis is required for Z33522.BASTM alloy designations were established in accordance with Practice B 27
28、5. UNS assignations were established in accordance with Practice E 527. The last digitof a UNS number differentiates between alloys of similar composition. UNS designations for ingot and casting versions of an alloy were not assigned in the same sequencefor all alloys.CFor purposes of acceptance and
29、 rejection, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-handplace of figures, used in expressing the specified limit, in accordance with the rounding procedure prescribed in Practice E 29.DWhen this material is required to con
30、form to ISO Standard 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.EZinc-aluminum ingot for foundry and pressure die casting may contain nickel, chromium, and manganese in amounts of up to 0.01 % each or 0.03 % total. No harmfuleffects have ever been noted due to the
31、 presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements.FRefer to Practice B 908. (Note: Colors indicated are for North American applications.)GDetermined arithmetically by difference.B24007128. Sampling for Determination of Chemical Com
32、position8.1 In the event of a dispute, if the ingots are shipped incarload lots of the same alloy, not less than five ingots shall betaken at random from the carload for sampling. If the shipmentis less than a carload lot, one sample ingot shall be taken foreach 10,000 lb. (4500 kg) or fraction ther
33、eof. Either party mayrequest that a sample be taken from each melt of 1000 lb. (450kg) or more.8.2 The samples for chemical analysis shall be taken bysawing, milling, or drilling in such a manner as to berepresentative of the average cross section of the ingot. Theweight of a prepared sample shall b
34、e not less than 75 g inaccordance with Practice E 88.8.3 The saw drill, or cutter used for taking the sample shallbe thoroughly cleaned. No lubricant shall be used in theoperation, and the sawings or metal chips shall be carefullytreated with a magnet to remove any particles or iron intro-duced in t
35、aking the sample by the method prescribed in 8.2.8.4 An optional method of sampling for analysis may be bymelting together representative portions of each ingot selectedand then sampling the liquid composite by casting suitablespecimens for either spectrographic or chemical analysis.8.5 Samples for
36、Spectrochemical and Other Methods ofAnalysis4Samples for spectrochemical and other methods ofanalysis shall be suitable for the form of material beinganalyzed and the type of analytical method used (for example,see Practice E 634).9. Methods for Chemical Analysis9.1 The determination of chemical com
37、position shall bemade in accordance with suitable analytical methods. In caseof dispute, the results secured by an approved method (orcombination of approved methods), or by a method agreedupon by both parties, shall be the basis of acceptance.9.1.1 Approved method include: Test Methods E 536, TestM
38、ethod E47(for tin), ISO 38151,orISO 38152.9.2 For purposes of determining compliance with specifiedcomposition limits as given in Table 1, an observed orcalculated value shall be rounded to the nearest unit in the lastright-hand place of figures shown in Table 1, in accordancewith the rounding metho
39、d of Practice E 29.10. Source Inspection10.1 If the purchaser desires that his representative inspector witness the inspections and testing of the product prior toshipment, such agreement shall be made by the purchaser andproducer or supplier as part of the contract or purchase order.10.2 When such
40、inspection or witness of inspection andtesting is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests shall be conducted so there is nounnecessary
41、interference with the producers operations.11. Rejection and Rehearing11.1 Material that fails to conform to the requirements ofthis specification may be rejected. Rejection should be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test,
42、 the producer orsupplier may make claim for a rehearing. If the rehearingestablishes that the material does not conform to the require-ments of this specification, as much of the rejected originalmaterial as possible shall be returned to the producer orsupplier.12. Identification Marking12.1 All ing
43、ots shall be properly marked for identificationwith the producers name or brand.12.2 Each bundle or skid shall be identified with theproducers heat, lot, or other identification mark.12.3 Each ingot, bundle or skid shall be marked with theappropriate Color Code for the alloy as per North Americanreq
44、uirements in Practice B 908.13. Certification13.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled testedand inspected in accordance with this specification and hasbeen found to meet
45、 the requirements. When specified in thepurchase order or contract, a report of the test result shall befurnished.14. Preparation for Delivery14.1 PackagingUnless otherwise specified, the ingot shallbe packaged to provide adequate protection during normalhandling and transportation. Each package sha
46、ll contain onlyone alloy unless otherwise agreed upon.15. Keywords15.1 bar stock; castings; concast; continuous cast bar stock;die castings; foundry castings; permanent mold castings; pres-sure die castings; prototyping; sand castings; ZA alloys;Zamak; zinc; zinc-aluminum alloys; zinc metalB2400713A
47、PPENDIX(Nonmandatory Information)X1. NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYSX1.1 The information in this appendix does not constitutea part of this specification but is provided for informationalpurposes only. The nomenclature covers commercial zinc andzinc-aluminum (ZA) alloys i
48、n ingot form for remelting for themanufacture of pressure die castings and foundry castings, asdesignated and specified in Table 1.X1.2 Several different systems of nomenclature haveevolved over the years to designate the zinc alloys used forcasting, as listed in Table X1.1.X1.2.1 Common names refer
49、 to the long established zinccasting alloys by number based their sequential developmentpreceded by the word Alloy. Zinc-aluminum alloys (with ahigher aluminum content that the conventional zinc die castingalloys) use the prefix ZA followed by their approximatealuminum content. These terms are in common usage.X1.2.2 Traditional names for the long established zinccasting alloys use the prefix ZAMAK which was devised basedon the major elements present: zinc, aluminum, magnesiumand kopper (copper). Zinc-aluminum alloys use the prefix ZAfollowed by their
