1、Designation: B240 10Standard Specification forZinc and Zinc-Aluminum (ZA) Alloys in Ingot Form forFoundry and Die Castings1This standard is issued under the fixed designation B240; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e 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.1. Scope*1.1 This specification covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting for the
3、manufacture 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 40A Z33521Alloy 7 Zamak 7 AG 40B Z33522Alloy 5 Zamak 5 AC 41A Z35530A
4、lloy 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 diecastings. Zinc-aluminum alloys Z35635, Z35630, and Z35840are used for r
5、emelting 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 values stated in inch-pound units are to be regardedas standard. No ot
6、her units of measurement are included in thisstandard.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 therespon
7、sibility 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 applicability ofreg
8、ulatory 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 CastingsB2
9、75 Practice for Codification of Certain Nonferrous Met-als and Alloys, Cast and WroughtB897 Specification for Configuration of Zinc and ZincAlloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals andAlloysB908 Practice for the Use of Color Codes for Zinc CastingAlloy In
10、gotB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of
11、 Zinc and ZincAlloys2.3 Other ASTM Document:Methods for Emission Spectrochemical Analysis32.4 ISO Standards:4ISO 301 Zinc Alloy Ingots Intended for CastingISO 38151 Zinc and zinc alloys Part 1:Analysis of solid1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals an
12、d Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1949. Last previous edition approved in 2009 as B240 - 09. DOI:10.1520/B0240-10.2For referenced ASTM standards, visit the ASTM website
13、, 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.3Methods for Emission Spectrochemical Analysis: General Practices, Nomen-clature, Standard Methods, Proposed Method
14、s, Suggested Methods, ASTM Inter-national, 1982.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959, United States.samples by optical emission spectrometry.ISO 38152 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission spectrometry.3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of T
16、erms Specific to This Standard:3.2.1 continuous casting, na casting technique in which acast is continuously 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, in
17、gots, slabs and tubes; also known asconcast.3.2.2 die casting, na casting process in which moltenmetal 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 fo
18、r ingot under this specification shall includeinformation as specified in Specification B949, Section 4.5. Materials and Manufacturer5.1 The material covered by this specification shall be ofuniform quality and reasonably free from dross, adheringforeign matter, and surface oxide.6. Chemical Require
19、ments6.1 The ingots shall conform to the requirements as tochemical composition prescribed in Table 1. Conformanceshall be determined in accordance with Specification B949,Sections 5.2 and 5.2.1.7. Ingot Sizes and Shapes7.1 Zinc casting alloy ingots are typically supplied in ingotbundles weighing 17
20、00 to 2400 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
21、 14 lb. or 20 to 24lb.7.3 Zinc casting alloy ingot may be ordered in jumbos orblocks, as specified in Specification B897.7.4 Zinc casting alloy ingot may also be ordered in othershapes.8. Sampling for Determination of Chemical Composition8.1 Sampling procedures shall be in accordance with appro-pria
22、te provisions of Specification B949, Section 6.9. Methods for Chemical Analysis9.1 The determination of chemical composition shall bemade in accordance with Specification B949, Section 5.2.2.9.2 In case of dispute, the results secured by an approvedmethod (or combination of approved methods), or by
23、a methodagreed upon by both parties, shall be the basis of acceptance.9.2.1 Approved methods include: Test Methods E536,ISO 38151,orISO 38152.NOTE 1Test Methods E536 is directly applicable, in an unmodifiedform, only to alloys 3, 5 and 7. ISO 38151 and ISO 38152 are genericmethods applied to zinc an
24、d zinc alloys. Each of the methods may bemodified and formatted for the alloy to be assayed. An experiencedTABLE 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,EZA-27B,C,EZamak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27(
25、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 0.03-0.06 0.025-0.05 0.02-0.03 0.02-0.03 0.012-0.020Copper 0.10
26、 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 0.035 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 0.0015 0.0015 0.002 0.002 0.002Nickel - - - 0.005-0.020 - - -
27、- - - - - - - - - - - -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 %, respectively. No harmful effectshave ever been noted due to the pr
28、esence 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 B275. UNS assignations were established in accordance with Prac
29、tice E527. The last digit ofa 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 rejection, the observed value or calculated value obtained f
30、rom 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 E29.DWhen this material is required to conform to ISO Standard 301, the chemical limits for thallium and
31、 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 presence of these elements in up to these concentrations and,
32、 therefore, analyses are not required for these elements.FRefer to Practice B908. (Note: Colors indicated are for North American applications.)GDetermined arithmetically by difference.B240 102chemist, using suitable and/or traceable standards along with valid qualityassurance techniques, will be abl
33、e to perform and validate the methodsand demonstrate acceptable precision and accuracy.9.3 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
34、Table 1, in accordancewith the rounding method of Practice E29.10. Source Inspection10.1 Source inspection provisions shall be in accordancewith Specification B949, Section 7.11. Rejection and Rehearing11.1 Claims for rejection and rehearing shall be in accor-dance with Specification B949, Section 8
35、.12. Identification Marking12.1 All ingots shall be properly marked for identification inaccordance with Specification B949, Section 10.13. Certification13.1 When specified in the purchase order or contract,certification of the product shall be in accordance with Speci-fication B949, Section 9.14. P
36、reparation for Delivery14.1 PackagingUnless otherwise specified, the ingot shallbe packaged to provide adequate protection during normalhandling and transportation. Each package shall contain onlyone alloy unless otherwise agreed upon.15. Keywords15.1 bar stock; castings; concast; continuous cast ba
37、r stock;die castings; foundry castings; permanent mold castings; pres-sure die castings; prototyping; sand castings; ZA alloys;Zamak; zinc; zinc-aluminum alloys; zinc metalAPPENDIX(Nonmandatory Information)X1. NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYSX1.1 The information in this ap
38、pendix does not constitutea part of this specification but is provided for informationalpurposes only. The nomenclature covers commercial zinc andzinc-aluminum (ZA) alloys in ingot form for remelting for themanufacture of pressure die castings and foundry castings, asdesignated and specified in Tabl
39、e 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 to the long established zinccasting alloys by number based their sequential developmentpreceded by the word Alloy. Zinc-alumin
40、um 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
41、the major elements present: zinc, aluminum, magnesiumand kopper (copper). Zinc-aluminum alloys use the prefix ZAfollowed by their approximate aluminum content. These termsare in common usage.X1.2.3 ASTM designations are established in Practice B275based on alloy chemistry. The first letter, A, refer
42、s to theprincipal alloying element, aluminum. The second letter, G(magnesium) or C (copper), refers to the second most signifi-cant alloying element. The first number, 4, refers to thenominal aluminum content. The second number refers to thenominal content to the second most significant alloying ele
43、-ment. The last letter, A or B, differentiates between alloys ofsimilar composition. Prior to the adoption of this designationsystem by ASTM, alloys were identified by Roman numerals,for example, XXI, XXIII and XV designated AC43A, AG40Aand AC41A, respectively.X1.2.4 UNS numbers are established in P
44、ractice E527(SAE J1086) as part of a Unified Numbering System to providea unique designation for each metal grade and alloy in useworldwide. Zinc alloys start with the prefix “Z” followed byfive numbers. The first digit is based on the major alloyingelement, the second digit provides a further sub-c
45、lassificationbased on secondary and tertiary alloying elements, the thirddigit designates the nominal composition of the of the majoralloying element, the fourth digit designates the nominalconcentration of the second most important alloying element,and the fifth digit allows a unique number to be e
46、stablished todifferentiate between similar compositions.TABLE X1.1 Nomenclature Systems for Zinc and Zinc-Aluminum(ZA) AlloysCommon Traditional ASTM UNSAlloy 3 Zamak 3 AG 40A Z33521Alloy 7 Zamak 7 AG 40B Z33522Alloy 5 Zamak 5 AC 41A Z35530Alloy 2 Zamak 2 AC 43A Z35635ZA-8 ZA-8 . Z35635ZA-12 ZA-12 .
47、Z35630ZA-27 ZA-27 . Z35840B240 103SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue (B240 - 09)that may impact the use of this standard. (Approved April 1, 2010.)(1) The iron (Fe) limit as listed in Table 1 has been loweredfrom 0.07
48、5 % to 0.035 %.(2) Revisions have been made to Sections 4, 6, 8, 9, 10, 11, 12,and 13 to reference Specification B949 and delete certainparagraphs of these sections formerly part of this standard.Committee B02 has identified the location of selected changes to this standard since the last issue(B240
49、 - 071) that may impact the use of this standard. (Approved October 1, 2009.)(1) The reference to Test Methods E47 as a method to analyzefor tin only has been removed.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 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 respon
