1、Designation: B240 10B240 13Standard 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.1. Scope*1.1 This specification covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting
3、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 ASTMA UNSACommon Traditional ASTMA UNSAAlloy 3 Zamak 3 AG 40A Z33521Alloy 3 Zamak 3 AG 4
4、0A Z33524Alloy 7 Zamak 7 AG 40B Z33522Alloy 7 Zamak 7 AG 40B Z33526Alloy 5 Zamak 5 AC 41A Z35530Alloy 5 Zamak 5 AC 41A Z35532Alloy 2 Zamak 2 AC 43A Z35540Alloy 2 Zamak 2 AC 43A Z35544ZA-8 ZA-8 . Z35635ZA-8 ZA-8 . Z35637ZA-12 ZA-12 . Z35630ZA-12 ZA-12 . Z35632ZA-27 ZA-27 . Z35840ZA-27 ZA-27 . Z35842_
5、A See Table 1, footnote B.1.2 Zinc alloys Z33521, Z33522, Z35530, and Z35540Z33524, Z33526, Z35532, and Z35544 are used primarily for remeltingin the manufacture of pressure die castings. Zinc-aluminum alloys Z35635, Z35630,Z35637, Z35632, and Z35840Z35842 are usedfor remelting in the manufacture of
6、 both foundry and pressure die castings. Castings made from these ingots are specified inSpecification B86, Standard Specification for Zinc and Zinc-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 ar
7、e included in thisstandard.1.4 Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described 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 t
8、his standard to become familiar with all hazards including those identified in the appropriate Material Safety DataSheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations pr
9、ior to use.2. Referenced Documents2.1 The following documents of the issue in effect 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 res
10、ponsibility of Subcommittee B02.04 on Zincand Cadmium.Current edition approved April 1, 2010Feb. 1, 2013. Published May 2010March 2013. Originally approved in 1949. Last previous edition approved in 20092010 asB240 - 09.B240 10. DOI: 10.1520/B0240-10.10.1520/B0240-13.This document is not an ASTM sta
11、ndard 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 cas
12、es 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 Standa
13、rds:2B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die CastingsB275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and WroughtB897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-fe
14、rrous Metals 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 Metal
15、s and Alloys 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 Analysis32.4 ISO Standards:4ISO 301 Zinc Alloy Ingots Intended for CastingISO 38151 Zinc and zinc alloys Part 1: Analysis of s
16、olid samples 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 c
17、asting, na 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.
18、2.2 die casting, 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.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactA
19、STM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Methods for Emission Spectrochemical Analysis: General Practices, Nomenclature, Standard Methods, Proposed Methods, Suggested Methods, ASTM
20、 International,1982.4 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 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,EZ
21、amak 3 Zamak 7 Zamak 5 Zamak 2 ZA-8 ZA-12 ZA-27(AG40A) (AG40B) (AC41A) (AC43A)Z33521 Z33522 Z35530 Z35540 Z35635 Z35630 Z35840(Z33524) (Z33526) (Z35532) (Z35544) (Z35637) (Z35632) (Z35842)Color CodeF None 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.
22、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 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 0.003
23、0 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 - - - - - - - - - - - - - - -ZincG Remainder Remainder Remainder Remainder Remainder Remainder RemainderA Zinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in
24、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 Z33522.Z33526.B ASTM alloy
25、designations 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
26、 same sequencefor 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 presc
27、ribed in 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
28、.03 % total. 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 d
29、ifference.B240 1324. Ordering Information4.1 Orders for ingot under this specification shall include information as specified in Specification B949, Section 4.5. Materials and Manufacturer5.1 The material covered by this specification shall be of uniform quality and reasonably free from dross, adher
30、ing foreignmatter, 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 5.2.1.7. Ingot Sizes and Shapes7.1 Zinc casting alloy
31、 ingots are 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 i
32、n two sizes 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 Composit
33、ion8.1 Sampling procedures shall be in accordance with appropriate provisions of Specification B949, Section 6.9. 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
34、by an approved 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,
35、5 and 7. 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
36、and validate 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
37、 accordance with the roundingmethod of Practice E29.10. Source Inspection10.1 Source inspection provisions shall be in accordance with Specification B949, Section 7.11. Rejection and Rehearing11.1 Claims for rejection and rehearing shall be in accordance with Specification B949, Section 8.12. Identi
38、fication Marking12.1 All ingots shall be properly marked for identification in accordance 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 SpecificationB949, Section 9.14. Preparation
39、for Delivery14.1 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 bar stock; castings; concast; continuous cast bar stock;
40、die castings; foundry castings; permanent mold castings; pressuredie castings; prototyping; sand castings; ZA alloys; Zamak; zinc; zinc-aluminum alloys; zinc metalB240 133APPENDIX(Nonmandatory Information)X1. NOMENCLATURE SYSTEMS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYSX1.1 The information in this app
41、endix 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 Ta
42、ble 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-al
43、uminum 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 b
44、ased 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
45、, 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 al
46、loying 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 estab
47、lished 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
48、 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 the fifth digit allows a uniq
49、ue numberto be established to differentiate between similar compositions.SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue(B240 - 09B240) 10) that may impact the use of this standard. (Approved AprilFebruary 1, 2010.)2013.)TABLE X1.1 Nomenclature Systems for Zinc and Zinc-Aluminum(ZA) AlloysCommon Traditional ASTM UNSAlloy 3 Zamak 3 AG 40A Z33521Alloy 3 Zamak 3 AG 40A Z33524Alloy 7 Zamak 7 AG 40B Z33522Alloy 7 Zamak 7 AG 40B Z33526Alloy 5 Zamak 5 AC 41A Z35530Alloy 5 Zamak 5 AC 41A Z355
