1、Designation: B327 12Standard Specification forMaster Alloys Used in Making Zinc Die Casting Alloys1This standard is issued under the fixed designation B327; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 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 aluminumbase and zincbasemaster alloys used to make zinc die-casting alloys. Alloycompositions specified
3、for aluminumbase master alloys (hard-eners) are designated as shown in Table 1. Alloy compositionsspecified for the zinc-base master alloys are designated asshown in Table 2.1.2 Aluminum alloy hardeners are added to Special HighGrade zinc (per Specification B6) in the proper alloying ratios,as shown
4、 in Table 1, to produce zinc alloys for die casting.1.3 Zinc-base master alloy is added to Special High Gradezinc (per Specification B6) in the proper alloying ratio, asshown in Table 3, to produce zinc alloy for die casting.1.4 Master alloys may be supplied in the form of shot, bar,ingot or jumbo i
5、ngot as specified by the purchaser.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 This standard does not purport to address all
6、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 Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish approp
7、riatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B6 Specifi
8、cation for ZincB899 Terminology Relating to Non-ferrous Metals andAlloysB908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with S
9、pecificationsE34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base AlloysE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for C
10、hemical Analysis of Zinc and ZincAlloysE1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Spark Atomic Emission Spectrometry2.3 ISO Standards:3ISO 3815-1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analy
11、sis byinductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of Terms Specific to This Standard:3.2.1 hardener, nan aluminum-base master alloy added toSpecial High Grade Zinc (SHG) to produce a zinc alloy fo
12、r diecasting.4. Ordering Information4.1 Orders for master alloys under this specification shallinclude the following information:4.1.1 Alloy (Table 1 or Table 2),4.1.2 Form: that is, shot, bar, ingot or jumbo ingot,4.1.3 Size: that is, maximum shot size or size of bar, ingot,or jumbo ingot,4.1.4 Uni
13、t weight: that is, nominal weight of shot per bag ornominal weight of each bar, ingot, or jumbo ingot,1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved
14、 May 1, 2012. Published July 2012. Originally approvedin 1958. Last previous edition approved in 2009 as B327 091. DOI: 10.1520/B0327-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
15、nformation, refer to the standards Document Summary page onthe ASTM website.3Available 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,
16、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.5 Markings on shot bags, bars, ingot or jumbo ingot,4.1.6 Palletizing, if required: means of palletizing andmaximum weight per pallet load,4.1.7 Place of inspection (Section 8), and4.1.8 For additional informatio
17、n see Section 4 of Specifica-tion B949.5. Materials and Manufacture5.1 The material may be made by any suitable process.5.2 The material covered by this specification shall be ofuniform quality and shall be free of dross, flux, or otherharmful contamination. Also, if the material is in shot form, it
18、shall be sound, uniform in size, and free of a heavily oxidizedsurface coating, stringers, and moisture.6. Chemical Requirements6.1 LimitsThe material shall conform to the requirementsas to chemical composition prescribed in Table 1 or Table 2.Inaddition there are weight limits for zinc-base master
19、alloyswhen supplied in jumbo ingot form. The weight of jumboingots shall conform to the requirements as prescribed in Table3.6.2 In case of dispute the following requirements shallapply:TABLE 1 Chemical Requirements for Aluminum-Base Master AlloysNOTE 1The following applies to all specified limits i
20、n this table: For purposes of determining conformance with this specification, the observed valueor calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specifiedlimit, in accordance with the rounding method
21、 of Practice E29.ASTMAlloyComposition, percentUsageAlu-minum,minCopperIron,maxSilicon,maxManga-nese,maxMagnesiumAZincChro-mium,maxNickel,maxTin,maxLead,maxACad-mium,maxAZG71A 87.0 1.7 max 0.8 0.7 0.50 0.651.05 6.57.5 0.20 0.20 0.02 0.020 0.010 1 part by weight of ZG71A, 21parts by weight of Special
22、HighGrade zincBto make ASTMzinc Alloy Z33520 (AG40A)Editorially corrected.ACarried to one additional decimal place to ensure proper control in the final alloy.BASTM Specification B6, for Zinc.TABLE 2 Chemical and Color Code Requirements for Zinc-Base Master AlloysA,B,CCommon(UNS)ColorCodeDAluminum M
23、agnesiumIronmax.Coppermax.Leadmax.Cadmiummax.Tinmax.ZincV12-3(Z33730)Pink 11.712.6 0.0900.16 0.070 0.25 0.005 0.004 0.003 RemainderV125(Z-)Pink/Black 11.712.6 0.0900.16 0.070 2.13.3 0.005 0.004 0.003 RemainderEditorially corrected.AZinc-base master alloys V12-3 (Z33730) and V12-5 (Z-)used for produc
24、ing die casting alloys may contain nickel, chromium, silicon, and manganese up to 0.02,0.02, 0.035 and 0.05 %, respectively. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations in die casting alloysand, therefore, analyses are not required for
25、these elements, except that nickel analysis is required when producing die casting alloy Z33522 or Z35530.BThe UNS assignations were established in accordance with Practice E527.CFor purposes of determining conformance with this specification, the observed value or calculated value obtained from ana
26、lysis shall be rounded off “to the nearestunit” in the last right hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.DRefer to Practice B908.(Note: Color Codes indicated are for North American applications.)TABLE 3 Weight Requirements
27、 for Zinc-Base Master Alloy Jumbo IngotsNOTE 1These requirements are based on the use of nominal 2400 lb or 1200 lb jumbo ingots of V12 (Z33730).NominalWeight, lbWeight Range, lbAUsageMinimum Maximum2400 2325 2475 1 part by weight of V12-3 (one 2400 lb jumbo ingot), 2 parts by weight (two 2400 lb ju
28、mbo ingots) of Special HighGrade zinc to make zinc alloy 3 (Zamak 3, UNS Z33520, AG40A)or1 part by weight of V12-5 (one 2400 lb jumbo ingot), 2 parts by weight (two 2400 lb jumbo ingots) of Special HighGrade zinc to make zinc alloy 5 (Zamak 5, UNS Z35531, AC41A)1200 1150 1250 1 part by weight of V12
29、-3 (one 1200 lb jumbo ingot), 2 parts by weight (one 2400 lb jumbo ingot) of Special High Gradezinc to make zinc alloy 3 (Zamak 3, UNS Z33520, AG40A)or1 part by weight of V12-5 (one 1200 lb jumbo ingot), 2 parts by weight (one 2400 lb jumbo ingot) of Special High Gradezinc to make zinc alloy 5 (Zama
30、k 5, UNS Z35531, AC41A)AJumbo ingots outside the above weight limits may be acceptable depending upon the chemistry, if mutually agreed upon between the producer and purchaser.B327 1226.2.1 Number of samplesSamples for verification ofchemical composition shall be taken as follows:6.2.2 If the master
31、 alloys are shipped in carload lots of thesame alloy, not less than five samples shall be taken at randomfrom the carload for sampling. If the shipment is in less thancarload lots, the following shall apply:6.2.2.1 Aluminum-base master alloysOne sample shall betaken for each 6000 lb (2722 kg) or fra
32、ction thereof. When itis deemed necessary, a sample may be taken from each melt of500 lb (227 kg) or more of the alloy.6.2.2.2 Zinc-base master alloysOne sample shall be takenfor each 10 000 lb (4536 kg) or fraction thereof. Whennecessary, a sample may be taken from each melt of 1000 lb(454 kg) or m
33、ore.6.2.3 A sample may consist of an ingot or bar. In the case ofmetal in shot form, a small representative lot of the shot maybe melted and poured to form a thin chill-cast bar approxi-mately14 in. (6.4 mm) thick or a suitable spectrographic moldsample. In the case of a jumbo ingot, the sample may
34、be a castspectrographic specimen taken from the same pour used to castthe jumbo ingots.6.3 Methods of SamplingSamples for determination ofchemical composition shall be taken in accordance with one ofthe following methods:6.3.1 Samples for chemical analysis shall be taken from thematerial by drilling
35、, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain a weight of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.6.3.2 By agreement between the producer and the purchaser,other methods of sampling cast products for spectrochemicaland
36、other methods of analysis may be used. Such methods shallbe suitable for the form of material being analyzed and the typeof analytical method used.6.3.2.1 An optional method of sampling for analysis may beto melt together representative portions of each ingot selected,and then sample the liquid comp
37、osite by casting suitablespecimens for spectrographic or chemical analysis, or both.6.3.2.2 Samples may also be in the form of separately castspectrographic specimens taken from the same pour used tocast the ingot.6.3.3 As there is no generally accepted method for obtaininga representative sample fr
38、om a jumbo ingot, the method ofchoice will be as described in 6.3.2.2.6.4 Method of AnalysisThe determination of chemicalcomposition shall be in accordance with suitable methods.6.4.1 For aluminum-base master alloysThe determina-tion of chemical composition shall be in accordance withsuitable chemic
39、al (Test Methods E34), spectrochemical (TestMethod E1251) or other methods. In case of dispute, the resultsof Test Methods E34 shall be the basis of acceptance.6.4.2 For zinc-base master alloysThe determination ofchemical composition shall preferably be in accordance withsuitable chemical (Test Meth
40、od E536), ISO 3815-1,ISO 3815-2, (note: ISO 3815-2 is not specific for zinc-basemaster alloy, but may be used in a generic manner with suitablevalidation), or other methods. Because there is no specificASTM or ISO method covering the composition of thiszinc-base master alloy, the test method used as
41、 the basis ofacceptance shall be as agreed upon between the producer andpurchaser.7. Size and Shape7.1 Aluminum alloy hardener may be supplied in the formof shot, bar or ingot but typically is supplied as shot.7.2 Zinc-base master alloy may be supplied as ingot orjumbo ingot but is typically supplie
42、d as jumbo ingot.7.2.1 The weight of zinc master alloy jumbo ingots isimportant because they are added in a fixed ratio to SpecialHigh Grade zinc jumbo ingots. The weight of jumbo ingotsshall be 1200 6 50 lbs or 2400 6 75 lbs. Other sizes or weightlimits, or both, may be as agreed upon by the produc
43、er andcustomer.8. Source Inspection8.1 See Section 9 of Specification B949.9. Rejection and Rehearing9.1 Material that fails to conform to the requirements of thisspecification may be rejected. Rejection should be reported tothe producer or supplier promptly and in writing. In case ofdissatisfaction
44、 with the results of the test, 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.9.2 For
45、additional information see Section 8 of SpecificationB949.10. Identification Marking10.1 All shot bags, bars, ingots, or jumbo ingots shall beproperly marked for identification with the producers name orbrand.10.2 For additional information see Section 10 of Specifi-cation B949.11. Preparation for D
46、elivery11.1 See Section 10 of Specification B949.12. Keywords12.1 aluminum alloy hardener; aluminum-base master al-loy; master alloy; V12; zinc-base master alloy; zinc die castingalloyB327 123SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the l
47、ast issue (B327 -09a1) that may impact the use of this standard. (Approved May 1, 2012.)(1) Revisions have been made to Sections 2, 4, 8, 9, 10, and 11to reference Specification B949 and deleted certain sections ofthese sections formerly part of this standard.(2) UNS reference was removed editoriall
48、y from Table 1.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 s
49、uch rights, are entirely their 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 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 rec
