1、Designation: B240 13B240 17Standard 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 revis
2、ion, 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 U.S. Department of Defense.1. Scope*1.1 This specifica
3、tion covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting for the manufactureof pressure die castings, foundry castings and continuous cast bar stock as designated and specified in Table 1. Seven alloycompositions are specified, designated as follows:Common Traditional AS
4、TMA UNSAAlloy 3 Zamak 3 AG 40A Z33524Alloy 7 Zamak 7 AG 40B Z33526Alloy 5 Zamak 5 AC 41A Z35532Alloy 2 Zamak 2 AC 43A Z35544ZA-8 ZA-8 . Z35637ZA-12 ZA-12 . Z35632ZA-27 ZA-27 . Z35842ACuZinc52 ACuZinc5 . Z46540A See Table 1, footnote B.1.2 Zinc alloys Z33524, Z33526, Z35532, Z46540, and Z35544 are us
5、ed primarily for remelting in the manufacture of pressuredie castings. Zinc-aluminum alloys Z35637, Z35632, and Z35842 are used for remelting in the manufacture of both foundry andpressure die castings. Castings made from these ingots are specified in Specification B86, Standard Specification for Zi
6、nc andZinc-Aluminum Alloys for Foundry and Die Castings.1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in thisstandard.1.4 Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described
7、 in AppendixX1.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety DataSheet (MSDS)(SDS) for t
8、his product/material as provided by the manufacturer, to establish appropriate safety safety, health, andhealthenvironmental practices, and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized p
9、rinciples on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect
10、 on data of order acceptance form a part of this specification to the extentreferenced herein:1 This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zincand Cadmium.Current edition approved Feb.
11、1, 2013Nov. 1, 2017. Published March 2013November 2017. Originally approved in 1949. Last previous edition approved in 20102013 asB240 10.13. DOI: 10.1520/B0240-13.10.1520/B0240-17.2 ACuZinc and ACuZinc5 are registered trade names of the General Motors Corporation.This document is not an ASTM standa
12、rd and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases
13、only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 ASTM Standards
14、:3B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die CastingsB275 Practice for Codification of Certain Zinc, Tin and Lead Die CastingsB897 Specification for Configuration of Zinc and Zinc Alloy Jumbo, Block, Half Block, and Slab IngotB899 Terminology Relating to Non-ferrous Meta
15、ls and AlloysB908 Practice for the Use of Color Codes for Zinc Casting Alloy IngotB949 Specification for General Requirements for Zinc and Zinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE527 Practice for Numbering Metals and Allo
16、ys in the Unified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys2.3 Other ASTM Document:Methods for Emission Spectrochemical Analysis42.4 ISO Standards:5ISO 301 Zinc Alloy Ingots Intended for CastingISO 38151 Zinc and zinc alloys Part 1: Analysis of solid sampl
17、es by optical emission spectrometry.ISO 38152 Zinc and zinc alloys Part 2: Analysis by inductively coupled plasma optical emission spectrometry.3. Terminology3.1 Terms shall be defined in accordance with Terminology B899.3.2 Definitions of Terms Specific to This Standard:3.2.1 continuous casting, na
18、 casting technique in which a cast is continuously withdrawn through the bottom of the mold asit solidifies, so that its length is not determined by mold dimensions; used chiefly to produce semifinished mill products such asbillets, blooms, ingots, slabs and tubes; also known as concast.3.2.2 die ca
19、sting, na casting process in which molten metal is injected under high velocity and pressure into a metal die andsolidified, also a product produced by such a process. Alternately known as pressure die casting.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Custom
20、er Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standardsstandards Document Summary page on the ASTM website.4 Methods for Emission Spectrochemical Analysis: General Practices, Nomenclature, Standard Methods, Proposed Methods, Suggested Methods, ASTM
21、International,1982.5 Available 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,D,G Alloy 7A,B,C,D,G Alloy 5A,B,C,D,G Alloy 2A,B,C,D,G ZA-8B,C,E,G ZA-12B,C,E,G
22、ZA-27B,C,E,G ACuZinc5B,C,GZamak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27 ACuZinc5(AG40A) (AG40B) (AC41A) (AC43A)(Z33524) (Z33526) (Z35532) (Z35544) (Z35637) (Z35632) (Z35842) (Z46540)Alloy 3A,B,C,D Alloy 7A,B,C,D Alloy 5A,B,C,D Alloy 2A,B,C,D ZA-8B,C,E ZA-12B,C,E ZA-27B,C,EZamak 3 Zamak 7 Zamak 5
23、Zamak 2 ZA-8 ZA-12 ZA-27(AG40A) (AG40B) (AC41A) (AC43A)(Z33524) (Z33526) (Z35532) (Z35544) (Z35637) (Z35632) (Z35842)Color CodeF None Brown Black Green Blue Orange Purple RedElementAluminum 3.9-4.3 3.9-4.3 3.9-4.3 3.9-4.3 8.2-8.8 10.8-11.5 25.5-28.0 2.8-3.3Magnesium 0.03-0.06 0.010-0.020 0.03-0.06 0
24、.025-0.05 0.02-0.03 0.02-0.03 0.012-0.020 0.035-0.050Copper 0.10 max 0.10 max 0.7-1.1 2.7-3.3 0.9-1.3 0.5-1.2 2.0-2.5 5.2-6.0Iron, Max 0.035 0.035 0.035 0.035 0.035 0.05 0.07 0.05Lead, Max 0.0040 0.0030 0.0040 0.0040 0.005 0.005 0.005 0.004Cadmium, Max 0.0030 0.0020 0.0030 0.0030 0.005 0.005 0.005 0
25、.003Tin, Max 0.0015 0.0010 0.0015 0.0015 0.002 0.002 0.002 0.002Nickel - - - 0.005-0.020 - - - - - - - - - - - - - - - - - -ZincG Remainder Remainder Remainder Remainder Remainder Remainder Remainder RemainderA Zinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in
26、amounts of up to 0.02, 0.02, 0.035 and 0.05 %, respectively. 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 Z33526.B ASTM alloy designa
27、tions were established in accordance with Practice B275. UNS assignations were established in accordance with Practice E527. The last digit of aUNS number differentiates between alloys of similar composition. UNS designations for ingot and casting versions of an alloy were not assigned in the same s
28、equencefor all alloys.C For purposes of acceptance and 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 i
29、n Practice E29.D When this material is required to conform to ISO Standard 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.E Zinc-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 % t
30、otal. No harmfuleffects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements.F Refer to Practice B908. (Note: Colors indicated are for North American applications.)G Determined arithmetically by differen
31、ce.B240 1724. Ordering Information4.1 Orders for ingot under this specification shall include information as specified in Specification B949, Section 45. Materials and Manufacturer5.1 The material covered by this specification shall be of uniform quality and reasonably free from dross, adhering fore
32、ignmatter, and surface oxide.6. Chemical Requirements6.1 The ingots shall conform to the requirements as to chemical composition prescribed in Table 1. Conformance shall bedetermined in accordance with Specification B949, Sections 5.2 and 5.2.17. Ingot Sizes and Shapes7.1 Zinc casting alloy ingots a
33、re typically supplied in ingot bundles weighing 1700 to 2400 lb.7.2 Ingots and bundles vary in size and weight depending on the alloy and supplier.7.2.1 Standard ingots have a nominal weight in the range of 17 to 24 lb. and are generally 24 to 26 in. long.7.2.2 Margash bars or ingots come in two siz
34、es with a nominal weight in the range of either 12 to 14 lb. or 20 to 24 lb.7.3 Zinc casting alloy ingot may be ordered in jumbos or blocks, as specified in Specification B897.7.4 Zinc casting alloy ingot may also be ordered in other shapes.8. Sampling for Determination of Chemical Composition8.1 Sa
35、mpling procedures shall be in accordance with appropriate provisions of Specification B949, Section 69. Methods for Chemical Analysis9.1 The determination of chemical composition shall be made in accordance with Specification B949, Section 5.2.2. .9.2 In case of dispute, the results secured by an ap
36、proved method (or combination of approved methods), or by a method agreedupon by both parties, shall be the basis of acceptance.9.2.1 Approved methods include: Test Methods E536, ISO 38151, or ISO 38152.NOTE 1Test Methods E536 is directly applicable, in an unmodified form, only to alloys 3, 5 and 7.
37、 ISO 38151 and ISO 38152 are generic methodsapplied to zinc and zinc alloys. Each of the methods may be modified and formatted for the alloy to be assayed. An experienced chemist, using suitableand/or traceable standards along with valid quality assurance techniques, will be able to perform and vali
38、date the methods and demonstrate acceptableprecision and accuracy.9.3 For purposes of determining compliance with specified composition limits as given in Table 1, an observed or calculatedvalue shall be rounded to the nearest unit in the last right-hand place of figures shown in Table 1, in accorda
39、nce with the roundingmethod of Practice E29.10. Source Inspection10.1 Source inspection provisions shall be in accordance with Specification B949, Section 711. Rejection and Rehearing11.1 Claims for rejection and rehearing shall be in accordance with Specification B949, Section 812. Identification M
40、arking12.1 All ingots shall be properly marked for identification in accordance with Specification B949, Section 1013. Certification13.1 When specified in the purchase order or contract, certification of the product shall be in accordance with SpecificationB949, Section 914. Preparation for Delivery
41、14.1 PackagingUnless otherwise specified, the ingot shall be packaged to provide adequate protection during normal handlingand transportation. Each package shall contain only one alloy unless otherwise agreed upon.15. Keywords15.1 ACuZinc5; bar stock; castings; concast; continuous cast bar stock; di
42、e castings; foundry castings; permanent moldcastings; pressure die castings; prototyping; sand castings; ZA alloys; Zamak; zinc; zinc-aluminum alloys; zinc metalB240 173APPENDIX(Nonmandatory Information)X1. NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYSX1.1 The information in this appen
43、dix does not constitute a part of this specification but is provided for informational purposesonly. The nomenclature covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting for the manufactureof pressure die castings and foundry castings, as designated and specified in Tabl
44、e 1.X1.2 Several different systems of nomenclature have evolved over the years to designate the zinc alloys used for casting, as listedin Table X1.1.X1.2.1 Common names refer to the long established zinc casting alloys by number based their sequential development precededby the word Alloy. Zinc-alum
45、inum alloys (with a higher aluminum content that the conventional zinc die casting alloys) use theprefix ZA followed by their approximate aluminum content. These terms are in common usage.X1.2.2 Traditional names for the long established zinc casting alloys use the prefix ZAMAK which was devised bas
46、ed on themajor elements present: zinc, aluminum, magnesium and kopper (copper). Zinc-aluminum alloys use the prefix ZA followed bytheir approximate aluminum content. These terms are in common usage.X1.2.3 ASTM designations are established in Practice B275 based on alloy chemistry. The first letter,
47、A, refers to the principalalloying element, aluminum. The second letter, G (magnesium) or C (copper), refers to the second most significant alloyingelement. The first number, 4, refers to the nominal aluminum content. The second number refers to the nominal content to thesecond most significant allo
48、ying element. The last letter, A or B, differentiates between alloys of similar composition. Prior to theadoption of this designation system by ASTM, alloys were identified by Roman numerals, for example, XXI, XXIII and XVdesignated AC43A, AG40A and AC41A, respectively.X1.2.4 UNS numbers are establi
49、shed in Practice E527 (SAE J1086) as part of a Unified Numbering System to provide a uniquedesignation for each metal grade and alloy in use worldwide. Zinc alloys start with the prefix “Z” followed by five numbers. Thefirst digit is based on the major alloying element, the second digit provides a further sub-classification based on secondary andtertiary alloying elements, the third digit designates the nominal composition of the of the major alloying element, the fourth digitdesignates the nominal concentration of the second most important alloying element, and
