1、Designation: B327 13aStandard 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 show
4、n 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
5、ingot 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 appro
7、priatesafety 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 Specif
8、ication for ZincB275 Practice for Codification of Certain Nonferrous Metalsand Alloys, Cast and WroughtB899 Terminology Relating to Non-ferrous Metals and Al-loysB908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotB949 Specification for General Requirements for Zinc andZinc Alloy Pro
9、ductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE34 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 f
10、or Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical 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
11、 solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis 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
12、aluminum-base master alloy added toSpecial High Grade Zinc (SHG) to produce a zinc alloy for diecasting.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 approv
13、ed Aug. 1, 2013. Published September 2013. Originallyapproved in 1958. Last previous edition approved in 2013 as B327 13. DOI:10.1520/B0327-13A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards v
14、olume information, 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM Internatio
15、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. 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 Siz
16、e: that is, maximum shot size or size of bar, ingot,or jumbo ingot,4.1.4 Unit weight: that is, nominal weight of shot per bag ornominal weight of each bar, ingot, or jumbo ingot,4.1.5 Markings on shot bags, bars, ingot or jumbo ingot,4.1.6 Palletizing, if required: means of palletizing andmaximum we
17、ight per pallet load,4.1.7 Place of inspection (Section 8), and4.1.8 For additional information 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
18、 free of dross, flux, or otherharmful contamination. Also, if the material is in shot form, itshall be sound, uniform in size, and free of a heavily oxidizedsurface coating, stringers, and moisture.TABLE 1 Chemical Requirements for Aluminum-Base Master AlloysNOTE 1The following applies to all specif
19、ied limits in 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 rou
20、nding method of Practice E29.ASTMAlloyComposition, percentUsageAlu-minum,minCopperIron,maxSilicon,maxManga-nese,maxMagnesiumAZincChro-mium,maxNickel,maxTin,maxLead,maxACad-mium,maxAZG71AB87.0 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,B21parts by weight
21、 of Special HighGrade zincCto make ASTMzinc alloy Z33524 (AG40AB)ACarried to one additional decimal place to ensure proper control in the final alloy.BASTM alloy designations were established in accordance with Practice B275.CASTM Specification B6, for Zinc.TABLE 2 Chemical and Color Code Requiremen
22、ts for Zinc-Base Master AlloysA,B,CCommon(UNS)ColorCodeDAluminum MagnesiumIronmax.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(Z35740)Pink/Black 11.712.6 0.0900.16 0.070 2.13.3 0.005 0.004 0.003 RemainderAZinc-base master all
23、oys V12-3 (Z33730) and V12-5 (Z35740) used for producing die casting alloys may contain nickel, chromium, silicon, and manganeseupto0.02,0.02, 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 al
24、loysand, therefore, analyses are not required for these elements, except that nickel analysis is required when producing die casting alloy Z33526.BThe UNS assignations were established in accordance with Practice E527.CFor purposes of determining conformance with this specification, the observed val
25、ue or 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 specified limit, in accordance with the rounding method of Practice E29.DRefer to Practice B908.(Note: Color Codes indicated are for North American a
26、pplications.)TABLE 3 Weight Requirements 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 i
27、ngot), 2 parts by weight (two 2400 lb jumbo ingots) of Special HighGrade zinc to make zinc alloy 3 (Zamak 3, UNS Z33524, AG40AB)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 Z35532, AC4
28、1AB)1200 1150 1250 1 part by weight of V12-3 (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 Z33524, AG40AB)or1 part by weight of V12-5 (one 1200 lb jumbo ingot), 2 parts by weight (one 2400 lb jumbo ingot) of Specia
29、l High Gradezinc to make zinc alloy 5 (Zamak 5, UNS Z35532, AC41AB)AJumbo ingots outside the above weight limits may be acceptable depending upon the chemistry, if mutually agreed upon between the producer and purchaser.BASTM alloy designations were established in accordance with Practice B275.B327
30、13a26. 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 alloyswhen supplied in jumbo ingot form. The weight of jumboingots shall conform to the requirements
31、 as prescribed in Table3.6.2 In case of dispute the following requirements shallapply:6.2.1 Number of samplesSamples for verification ofchemical composition shall be taken as follows:6.2.2 If the master alloys are shipped in carload lots of thesame alloy, not less than five samples shall be taken at
32、 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 fraction thereof. When itis deemed necessary, a sample may be taken from each melt of500 lb (227 kg)
33、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 more.6.2.3 A sample may consist of an ingot or bar. In the case ofmetal in shot form, a small repre
34、sentative 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 be a castspectrographic specimen taken from the same pour used to castthe jumbo ingots.6.3 Methods
35、 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, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain a weight of prep
36、aredsample 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 other methods of analysis may be used. Such methods shallbe suitable for the form of material bein
37、g 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 composite by casting suitablespecimens for spectrographic or chemical analysis, or both.6.3.2.2 Sample
38、s 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 from a jumbo ingot, the method ofchoice will be as described in 6.3.2.2.6.4 Method of AnalysisThe de
39、termination of chemicalcomposition shall be in accordance with suitable methods.6.4.1 For aluminum-base master alloysThe determinationof chemical composition shall be in accordance with suitablechemical (Test Methods E34), spectrochemical (Test MethodE1251) or other methods. In case of dispute, the
40、results of TestMethods 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 Method E536), ISO 3815-1,ISO 3815-2, (note: ISO 3815-2 is not specific for zinc-basemaster alloy, but ma
41、y 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 the basis ofacceptance shall be as agreed upon between the producer andpurchaser.7. Size and Shape7
42、.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 supplied as jumbo ingot.7.2.1 The weight of zinc master alloy jumbo ingots isimportant because they are add
43、ed 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 producer andcustomer.8. Source Inspection8.1 See Section 9 of Specification B949.9. Rejection and Rehearin
44、g9.1 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 with the results of the test, the producer orsupplier may make claim for a rehearing. If the rehear
45、ingestablishes 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 additional information see Section 8 of SpecificationB949.10. Identification Marking10.1 All shot ba
46、gs, 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 Delivery11.1 See Section 10 of Specification B949.12. Keywords12.1 aluminum alloy hardener; aluminum-
47、base master al-loy; master alloy; V12; zinc-base master alloy; zinc die castingalloyB327 13a3SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue (B327-13)that may impact the use of this standard. (Approved August 1, 2013.)(1) Specific
48、ation B275 is referenced by a footnote in Tables 1and 3 and is added to Section 2.(2) Alloy A07131 was removed editorially from Table 1.(3) “UNS” was removed editorially from the column headingof Table 1.(4) Z35532 was removed editorially from Footnote A of Table2.Committee B02 has identified the lo
49、cation of selected changes to this standard since the last issue (B327-12)that may impact the use of this standard. (Approved February 1, 2013.)(1) UNS numbers were added.Committee B02 has identified the location of selected changes to this standard since the last 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 editoria
