I S617:1994 ( SupersedlneS20: 1977 ) CASTALUMINIUMANDITSALLOYS- INGOTS ANDCASTlNGS FOR GENERAL ENGINEERINGPURPOSES- SPECIFICATION ( ThirdRevision/ Second ReprintMARCH1998 UDC669.7I-412114 QBIS1994 BUREAUOFINDIANSTANDARDS MANAKBHAVAN,9BAHAQURSHAHZAFARMARG NEWDELHI110002 December1994 PriceGroup6 LightMetalsandTheirAlloysSectionalCommittee,MTD7 FOREWORD ThisIndianStandard(ThirdRevision)wasadoptedbytheBureauof IndianStandards,afterthedraft finalizedbytheLightMetalsandTheirAlloysSectionalCommitteehadbeenapprovedbythe MetallurgicalEngineeringDivisionCouncil. Thisstandardwasfirstpublishedin1955andsubsequentlyrevisedin1959and1975.Thisstandard supersedesIS20:!977Castaluminiumandaluminiumalloysformanufactureofutensils (thirdrevision).Inthisrevision,followingmodificationshavebeenmade: a)AmendmentsNo.1to3havebeenincorporated, b)Oldalloydesigna;ionshavebeendeleted, c)Newtemperdesignationshavebeenincorparated(seeAnnexBforcomparisonofoldandnew tempers), d)Requirementsofphysicalpropertieshavebeenmodified, e)Requirementsofalloydesignation4528and4628havebeenincluded, f)Requirementsofinvestmentcastinghavebeenincluded,and g)Requirementsofalloydesignationsforutensilshavebeenincluded. Guidelinesforselectionofdifferentalloysforcommonuseandspecialapplicationhavebeengivenin AnnexCforguidanceonly. Thisstandardcontainsclauses6.1.2,6.2,7.2.1,7.2.2,8.1,8.2,10.1.1,$11, and13.2whichprovide discretiontopurchaserorcallforagreementbetweenthesupplierandthepurchaser. WhilerevisingthisstandardassistancehasbeendrawnfromBS1490:1988Aluminiumandaluminium alloyingotsandcastingsforgeneralengineeringpurposes. Forthepurposeofdecidingwhetheraparticularrequirementofthisstandardiscompliedwith,thefinal value,observedorcalculated,expressingtheresultofatestoranalysis,shallberoundedoffin accordancewithIS2:1960Rulesforroundingoffnumericalvalues(revised).Thenumberof significantplacesretainedintheroundedoffvalueshouldbethesameasthatofthespecifiedvaluein thisstandard. Is617:1994 I ndianStandard CASTALUMINIUMANDITSALLOYS- INGOTSANDCASTINGSFORGENERAL ENGINEERING PURPOSES-.SPECIFICATION (Third Revision ) 1SCOPE Thisstandardcoverstherequirementsofcast aluminiumanditsalloysintheformofingotsand castingsforgeneralengineeringpurposes. 2REFERENCES TheIndianStandardslistedinAnnexAarenecessary adjunctstothisstandard. 3TERMINOLOGY 3.0Forthepurposeofthisstandard,thefollowing definitionsasgiveninIS5047(Part1):1986or otherewiseshallapply. 3.1cast The productofeitheronefurnacemelt,oranumberof furnacemeltswheresuchareaggregatedandmixed priorto samplingorpouring. 3.2costing Metallicshapesformedbypouringmoltenmetalintoa mould. $2.1ChillCasting Acastingformedinametallicmouid. 3.2.1.1Gravitydiecasting Achillcastinginwhichthemoltenmetalisintroduced bygravity. 3.2.1.2Lowpressurediecasting Achillcastingiuwhichthemoltenmetalisintroduced byalowpressurefeeJ. 33.13Pressurediecasting Achillcastinginwhichthemoltenmetalisintroduced underhighpressure. 3.23I nvestmentCasting Acastingformedfromanexpendablepatternwhichhas beeninvestedinasuitablemouldmaterial. 3.23SandCasting Acastingformedinasandmould. 3.3Jngot Acastsolidproductofspecificsize,shapeandchemical compositionofmetalor alloyintendedforremelting. 4SUPPLY OF MATERL4L Generalrequirementsrelatingtothesupplyofmaterial shallconformtoIS10259: 1982. 5CHEMICALCOMPOSITION 5.1 Thechemicalcompositionofcastaluminiumand 1 itsalloysshallconformtotherequirementgivenin Table1. 5.2AIuminiumandaluminiumalloydesignations 1900,4300and5230inMconditionaresuitablefor manufactureofcastutensilsprovidedbismuthandlead arerestrictedto0.5percent 5.3Thechemicalanalysisshallbe,carriedoutin accordancewithIS504:1963,IS7658:1975, IS11035:1984or*anyotherestablishedinstnrmen- tal/chemicalmethod.However,incaseofdisputethe procedurespecifiedinlatesteditionofIS504shallbe therefereemethod. 6MJXHANICALPROPERTIESOF CASTINGS 6.1 Tensile Properties 6.1.1 The tensile propertiesofseparatelycasttest samples shallconformtotherequirementsgiveninTable2 6.1.2Incaseofnon-availabilityofseparatelycasttest samples,testpiecemachinedfromthecastingsmaybe tested.Theform,sizeandlocationoftestpieces,dnd theminimummechanicaltestvaluestobeobtaiued fromthem,shallbeasagreedtobetweenthesupplier andthepurchaser.Howeveragreedvaliietensile propertiesshouldnotbelessthan75percentofthe speciikdvalue. 6.13The separatelycasttestsamplesshallconformto followingforms. 6.1.3.1Sandcastings, Thetest samples shallbecastindrysandmouidswhich, exceptinthecaseofAlloy5500,shallhaveinternal dimensionsasshowninFii.1or4.Themouldsshall beinclinedfromtheverticalatthecommencementof pouringandthemetalshalibepouredintothetopof themodds.Thesandofthemouldsmayberammed intoanyconvenientcontainer(suchasasteeitube), providedthatthetestsampleisseparatedfromthe containerwallsbynotlessthan27mmofsand.Inthe caseof Alloy5500,themouldoftestsampleshallhave thedimensionsasshowninFig.3. 6.133Chillcastings Wherethecastingsareproducedfrommetallicmoulds or dies,thetestsamplesshallbecastinmetallicmoulds havingdimensionsshowninFig.1 or2. 6.1.3.3I nvestmentcastings Thetestsamplesshallbecastinmouldsofsimilar material,undersimilarconditionstothoseofthecast- ingsrepresented.Themouldsusedshallhavethe dimensionsgiveninFig.5or6. Is 617 : 1994 Table1 ChemicalCompositionof CastAhminium andIts Alloys ( ChusP5.1 ) Percentbymass (Valuesgivenare maximumunless shown otherwise) ny$i)CopperSRic~ (2)(3)(4? 19000.205 19500.030.3 22sO4.0-5.00.25 22&J3.5450.1 25509.Cll.(,25 42232.0-4.04.0-6.0 4223A2.8-3.84.0-6.0 4225LO-l.54.5-6.0 43000.14.5-6.0 43233.0-5.05.0-7.0 44203.0-4.07.5-9.5 44231.5-U6.0-8.0 44500.16,s7.5 45200.7-259.0-11.5 452520408.5-10.5 45281.75-258.5-9.5 46al0.1IO&13.0 46OOA0.410.0.13.0 46281.75-2.511.0-12 5 46350.110.0-13.0 46520.7-1.5lU.O-12.0 si300.10.3 5snJ(I.10.15 MagnesiumziiLeadnoTi t ani umAluminium (5) 0.05 0.03 (9) 0.1 0.07 0.1 1.2-1.8 0.2-0.4 0.1 0.1 0.8 0.15 0.05 a3-6.0 0.1 0.1-0.3 0.3 0.3 0.20-0.45 0.3 a5-1.5 0.15 0.1 0.2 0.3 0.2-0.6 0.8-1.5 IronMangn-Nickel uese (6)(7)(8) 0.60.20.1 0.40.030.03 0.250.10.1 0.70.61.7-23 1.00.60.5 0.80.2-0.60.3 0.60.2-0.60.2 0.8050.3 0.6050.1 1.00.2-0.60.3 1.3050.5 0.80.2-0.60.3 0.5030.1 1.00505 1.205I .O 0.4-0.60.80.8 0.6050.1 1.0050.1 0.7-1.10.50.3 0.60.3-0.70.1 05 40.15 0.5 0.1 2.0 3.0 1.0 0.1 2.0 1.0 0.5 0.1 0.2 1.5 0.1 3,0&O 9.5-11.0 I .o0.50.7-1.50.5 0.60.34.70.10.1 0.40.10.10.1 (10) 0.05 0.03 0.05 0.05 0.1 0.1 0.1 0.2 0.1 0.2 0.3 0.2 0.1 0.3 0.2 0.1 0.1 0.1 0.05 0.1 0. I 0.05 0.05 SI No. (1) 1 .. 2. 3. 4. 5. 6. 7. 8 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. (11) 0.05 0.03 (12)(13) 99.0Mi tt 995Mi rr Remainder Remainder 0.05 0.05 0.1 am.3 OS 9.2 0.10.2Remainder o.u50.2Remainder 0.10.2Remainder Remainder Remainder 0.05 0.1 0.2 0.2 0.20.2Remainder 0.10.2RemaisdLr 0.050.2Remai~~d~r 0.20.2Remainder 0.10.2Remainder 010.2Remainder 0.050.2Remainder 0.10.2Remainder 0.10.2Remainder 0.050.2Remainder 0. I0.2Ren~indcr 0.05 rws 0.2 0.2 Remainder Remainder )i)cs;gn;~tionsshill1heasgiveninIS605 1: 1970. )(.:hnuniurnmntentinthisdloyshnllnotexceed2percent. Rlitnn~un~cownt.ifpresent,shdlbenotlessthan0.05percent 2 Is617: 1994 Table2TensilePropertiesof CastAiuminiumandPts !diloys ( Chause Ql.8) SINo. 0) 1. 2. 3. 5. 5. 0. 14. 15. t6. 17. 18. 19. 20. 21. 22. 23. CWdi t i oO (3) M M E T6 M %f x-6 T4 T4 I-6 M PM li M M E T6 M TS M TS T6 M M M E T6 TS T6 T-7 M T4 Sand CasrC& I ICastSand CastChillCast MinMi nMinMin f%(5) 161m 215 275 23 265 31.0 7 4 280 170 140 22-5 160 2% L 230 280 140 175 180 160 160 190 225 275 1.50 210 150 140 226 200 320. 1.0 1.5 165 165 190 190 5 5 270 170 240 190 230 295 1.5 140 175 140 275 210 200 280 170 310 3 8 13 9 2 G 3 4 B 1.5 2 3 2 5 i :J, 2.0 7 5 15 3 2 5 12 NOTE-Thetensilepropertiesobtainedfromseparatelycast samples do not necessarilyrepresenttne pro,xrtiesobtainable fromallparts,orinalldirections,ofacasting,whichwilldependonarmmberoffactorsinclti:-lingwallthicknessand coolingcharacteristics. 3 I S617: 1994 Rl@ -k c J 50 --I- 25 t I 15010204 FORMA t- +7G ---j 15G FORM B R7 SECTIONAA Alldimensionsinmillimetres. FIG.1 SANDORCHILL-CA~TTESTSAMPLES-FORMSA ANDB H - 25 13 FORMc Alldimensionsinmillimetres. FIG. 2 CHILL-CASTTETSAMPLES-FORMSC ANDD -Coned 4 1s 617 :1994 R9.5 FORMD Alldimensionsinmillimetres. FIG. 2CHILL-CASTTESTSAMPLES -FORMSCAND D Alldimensionsinmillimetres. FIG. 3SAND-CASTTESTSAMPLB-FORME 5 SECTIONAA IS617 : 1991 + _-- I _4447REF == --I- 913- I I - All dimensionsinmillimetres. FIG.5INVESTMENT-CASTTEST SAMPLE -Form%G (CASTTOSIZE ) 7 IS617 : 1994 1L IiVI\I . I1 III 50 CO 100 All dimensionsinmillimetres. FIG.6INVESTMENT-CASTTEST SAMPLE -FORM H 6.1.4Thetensiletestshallbecarriedoutinaccordance withIS1816i1979onroundtestpiecesofdimensions givenin Fig.7 aftermachiningfromthe casttest samples. 6.15Shouldatestpiecebreakoutsidethemiddlehalf ofthegaugelengthanddoesnotmeettherequirements ofmechanicalproperties,thetestshallbediscardedand anothersampletested. 6.2Hardness Hardnesstesting(seeIS1500: 1983) is recommended forgeneralassessmentofuniformityofsupplyofcast- ingsandnotingots.Whenhardnesstestsareagreedto betweenthesupplierandthepurchasertheagreed minimumand/ormaximumvaluesshallappearonthe drawing/testschedule/order,togetherwiththedetails oflocation,thesizeoftheindenterandtheloadtobe used. 7FREEDOMFROMDEFECTS 7.1Ingot.5 Theingotsshallbecleanandfreefromharmfuldefects. 7.2Castings Thecastingsshallbeclean,soundandfreefromharm- fuldefects. 73.1Eachcastingshallbeinspectedforcracks.The dyepenetranttest( seeIS3658: 1981)processmaybe usedtodetectcracksifrequiredbythepurchaserand standardofacceotanceshallbemutuallyagreedto betweenthesupplierandthepurchaser.Thecastings mayberepairedbythesupplierwithoutdetrimentto theultimateuseofthecasting,butthedecisionto repair thetypeofdefectshouldbemutuallyagreedto between thesupplierandthepurchaser. 7.2.2RadiolographyAJltrasonictestsmaybeapplied inspecialcasessubjecttoagreementbeetweenthe purchaserandthesupplier.Thedetailsof thetechniques tobeused,thefrequencyofinspectionandstandards ofacceptanceshouldbemutuallyagreed. IS617:1994 8CONDlTION 8.1Thecastingsshalibesuppliedinanyofthecondi- tionscoveredinTable2asspecifiedbythepurchaser. Thecondition(Temper)shallbeasdesignatedin IS5052: 1993. 8.2Ifstress-relievingtreatmentisrequired,thisshall bestatedintheorder.Theprocedureandcnteriafor acceptanceshallbeasagreedtobetweenthesupplier iand thepurchaser. 9TOLERANCESONDIMENSIONSOF CASTINGS Thedimensionsofthecastingsshallconformto customersdrawingsand/ororder.Thewallthickness withmachiningallowance,wherenecessary,shallbe stipulatedinthecustomersdrawingand/ororder.The castingsshallbecapableofbeingmachined,where required,tothefinisheddimensionsonthedrawing. 10SAMPLING 10.1ChemicalAnalysis 10.1.0Lot Theingots/castingsproducedfromthesamecastof 1 000kgorpartthereofshallconstitutealot. 10.1.1Onesampleforchemicalanalysisshallbe selectedfromeachcastoralotasmutuallyagreedto betweenthesupplierandthepurchaser. 10.1.2Specialcareshallbetakenduringsamplingof theingotsoreastings.Inallcases,firstdrillingsshall bediscardedtillacleanoxide-freesurfaceisreached. 10.2TensileTestforCastings 10.2.1Oneseparatelycasttestsampleshallbe selectedfromeachlotorheat-treatmentbatchnot exceeding1 000kg. 10.2.1.1Adequatenumberofseparatelycasttest samplesshallbepreparedfortensiletestfromeachcast sothatitispossibletocarryonetestforeachlot/heat- treatmentbatchandsamplesareavailableforretest. Diameterd=lOmm GaugelengthLo=SOmm Radiusatshoulder(minimum) r= 10 mm Minimumparallellength(L,)=55mm FIG7STANDARDROUNDTUTPEXE 9 IS614:1994 10.2.2Themetalforthetestsamplesshallbetaken fromthecrucibleorladiefromwhich,thecastingsare poured. 10.2.3TreatmentofTestSamples 10.2.3.1Incaseofnonheat-treatedcastings,thetest samplesshallnotbeheat-treated,hammered,orother- wisetreated(exceptbymachiningtotheshapeofthe testpiece)beforetheyaretested. 10.2.3.2Incaseofheat-treatedcastingsthetest samplesshallbeheat-treatedwiththecastingsthey represent.Thetestsamplesbeforeorafterheat-treat- mentshallnotbehammeredorotherwisetreated,ex- ceptbymachiningtotheshapeoftheroundtestpiece, ifnecessary. IIPRESSIIRETEST Whenrequiredbythepurchaser,eachcastingshallbe pressuretested.Fulldetailsoftherequired/agreedtest medium,testpressureandtimeundertestshallbe indicated-inthetestschedule,Castingsshallnotbe impregnatedorotherwisetreatedbya processdesigned toimprovepressure-tightnessexceptasindicatedintfie testschedule. 12RETEST 12.1Ifasampleselectedfaiailstomeettherequirements ofthemechanicalpropertiesmentionedin6,twofurther testsamplesrepresentingthesamecastmaybeselected andtested.If oneof the additionaltestsamplesmeetsthe requirementsofthetest,thecastingsrepresented therebyshallbedeemedtocomplywiththisstandard. KS No. 504: 1963 1500:19x3 1816:1979 2479:1981 3658: 1981 Ifbothof thesetest samplesfailto meetthe:equiremefits, thecastingsrepresentedtherebyshallberejected. 12.2Aiternativelyfor heat-treatedcastings,thesupplier mayreheat-treatthetestsamplesalongwithsamebatch ofcasting.Ifbothsamplesfailafterreheat-treatment, nofurtherretestispermissible. 13MARKING 13.8Ingots/castingsshallbesuitablymarkediror identification,withthefollowingdetails: a)Lotorheat-treatmentbatchnumber, b)Alloyandtemperdesignations,and c)Indicationofthesourceofmanufacture, 13.2Ifrequired,ingots/castingsmayalsobeCO~OW codedinaccordancewithIS2479: 1981. 13.3BISCertificationMarking 13.3.1Thematerialmayalsobemarkedwith:he StandardMark. 13.3.2TheuseoftheStandardMarkisgovernedby theprovisionsoftheBureauofiradranStandardsAct, 1986andtheRulesandRegulationsmade*elaereundea. Thedetailsofconditiomunderwhi&theiicencefor theuseoftheStandardI\iaarkmaybegrantedto manufacturersorproducersmaybeobtainedfromthe BureauofIndianStandards. 14TESTCERTIFICATE Eachconsignmentofingots/castingsshouldbeaccom- paniedbyatestcertificatecontainingdetailsofalloy designation,lot/heat-treatmentbatchnumberandcor- respondingchemicalcomposition,tensileproperties (forcastingsonly),etc. ANNEXA (Cfuuse2) LISTOFREFERREDINDIANSTANDARDS Title Methodsofchemical analysisofaluminiuniand itsalloys(revised) MethodforBrinellhardnesstest formetallicmaterials(second revision) Methodfortensiletestforlight metalsandtheiralloys(first revision) Colourcodeforidentificationof aluminiumandaluminiumalloys forgeneralengineeringpur- poses( secondrevision) Codeofpracticeforliquid penetrant5awdetection(first revision) ISNo. 5047 (Part1) :1986 5052: 1993 6051: 1970 7658: 1975 10259:1982 11035: 1984 fitle Glossaryoftermsrelatingto aluminiumandaluminiumalloys: Part1Unwroughtandwrought metals( secondrevision) Aluminiumanditsailoys-Temper designations(firstrevision) Codefordksignationofaluminium anditsalloys Spectrographicanalysisof aluminium Generalconditionofdeliveryand inspectionofaluminiumand aluminiumalloyproducts Methodsforspectrographic analysisofwroughtaluminium alloys. 10 IS617:1994 ANNEXB (Fore word ) COMPARISONOFOLDANDNEWTEMPERDESIGNATIONS OldTempers NewTempers I OldTempersNewTempers M W P M T4 T5 WP ws T6 T-7 ANNEXC (Foreword) GUIDETOTEESELECTIONOFCASTALUMINIUMANDITSALLOYS .* C-OTheentirerangeofalloyshasbeenclassifiedinto C-1.1.3Alloy4528 twogroups,namely,commonlyusedalloysandspecial application,alloys.Themodeof divisionwillenablethe ~~ IS is a newalloywioelyusedin automobileindustriti founderandthedesignertopickupmostappropriate becauseofgoodcastabilityandlow-shrinkage.Itcan alloyforaspecificapplication. b eusedascastaswellasheat-treatedcondition. C-1.1.4Alloy4600 C-lCOMMONLYUSEDALLOYS C-1.0Majorityofcastingsforcommonapplications areproducedfromAl-Cu-Sialloyswith0.5to 4 percent copperand8 to13 percentsilicon.Thesealloyspossess verygoodfoundrycharacteristicsandnormallydonot giverisetoseriouscastingdifficultiesinthefoundry. Forconveniencethisgrouphasbeendividedintotwo subgrdupsasgiveninC-l.1andC-1.2. C-l.1Sand,GravityDieandInvestmentCasting Alloys C-1.1.1Alloy4223and4423 Thesearethemostversariiealloys.Thesehave medium strengthwithgoodcastingcharacteristicsandsuitable forgeneralengineeringapplicarious,domesticandof- ficeequipment,householdtittmgs,automobIlecorn- ponents,electricaltoolsandswirchgear.Thesealloys canbecastinthinorthicksectionsandalsosuitablefor castingswhicharerequiredtobepressuretight.Cast- ingscanbefullyhkat-treaiedto achievehigherphysical properties. C-1.1.2Alloy4450 Highmechanicalstrengthinthefuliyheat-treatedCOII- ditionandhighresistancetocorrosionofthisalloy makesitversatileforawiderangeofengineering equipments,forexampie,enginecylinderblocksand beadsandothercastingsrequiredinroadtransport. Higherproofstress,greaterhardness,pressuretight- nessanddimensionalstabilityontemperaturevariation ofthisalleyareusedwithadvantageincastingsfor valve-bodies,largefanblades,pneumatictools,etc. Excellentcastabilityandfluiditypermitsthisalloyto beusedincaseofintricateandturnxalledcastings.In additionto goodfluidity,itscorrosionresistanceis very good.Someofitsapplicationsincludecastingsfor watercooledmanifolds,instrumentcases,switch boxes,motorhousings,castingsusedinmarineapplica- tions,pumps,chemicalanddyeindustries. Forcastingsformingapartofaweldedassemblythis alloyisthemostsuitable. C-1.15Alloy46OOA Theapplicationsofthisalloyaresimilartothoseof 4600exceptwherehighresistancetocorrosionis required.Insuchapplications4600Ashouldnotbe used,otherwiseit hasthe samefluidity,castabilityand machinability. C-l.2Pt~ssureDieCast i ngAlloys C-1.2.1Alloy4420 Thisalloyhas a highmechanicalsJrength,greaterhard- nessandbettermachinabilitythanalloys4520and 4600.Thecastingcharacteristicsareverygood. C-1.2.2Alloy4520 Mostofthepressurediecastingsrequiringmedium strengthareproducedfromthisalloy.Ithasgreater mechanicalstrength,hardness and better machinability than alloy4600.Forverythiw walledcastings,thisallc, istobepreferred. C-l.2.3A 110~4600 Thisalloyisrecommendedforthr.;ediecastingsfor whichtheserviceoperatingconditionsrequirearesis- tanceto corrosionbetterthanthatofferedbyalloy4420 11 Is617: 1994 or 4520. This alloyismostsuitablefor applicationlike directcontactwithchemicals,foodstufXs, sea waterand thoserequiringhighestresistancetocorrosiveatmos- phere. Theidealfluidityandfreedomfromhot-tearingofthis alloyfacilitatestheproductionofcomplexcastingsof largesurfaceareaandtheirwalls. C-1.2.4Alloy46OOA Theapplicationsofthisalloyaresimilartothoseof 4600exceptwherehighresistancetocorrosionis required.Insuchapplications4600Ashouldnotbe used,otherwiseithasthesameRuidity,castabilityand machinability. C-1.25Alloy4628 Thisisnewalloywidelyusedbyautomobileindustries wherehighvolumeproductiondiecastingshavingthin wallarerequired.Ithasgoodcastability,corrosion resistance,pressuretightness,lowshrinkageandgood weldability.Howeverthisalloyhaspoormachinability. C-2SPECIALAPPLICATIONALLOYS C-2.0Castingsdemandingspecialcharacteristics whicharenotprovidedinthecommonlyusedalloys havebeenlistedbelow.Itmaybenotedthatmanyof thealloysinthiscategorygivemorefoundryproblems andare;therefore,limitedtospecifiedapplication. C-2.1Alloys1950and1900 Thesealloystiavehighelectricalconductivityand thereforeusedinfittingsrequiredforelectricaltrans- mission.Alsosuitableforfoodandchemicalindustries. Theyhavepoorcastabilityduetohighshrinkageand hottearing. c-2.2Alloy2280 possesseshighstrengthandgoodductilityinthefully heat-treatedcondition.Applicationsarereciprocating partsofengines,Bywheelhousingandpropellers, artificiallimb,mouldingboxes.andothercastings requiring,highstrengthunderstress.Thealloyishot short. C-2.3Alloy2285 Itisalsoknownasyalloyandpossessesgood mechanicalstrengthatelevatedtemperatures.Itre- quiresspecialcastingtechniques.Thealloyis normally usedforpistonsandcylinderheads. C-2.4Alloy2550 Thisalloyis speciallysuitablefor castingsfor hydraulic equipment.Ithasexcellentmachinability. C-2.5Alloy4223A Possesseshighshockresistanceandtensilestrength. Suitableforstructuralcomponentsandcastingsfor heavydutyserviceinroadtrarsportvehicles. C-2.6Alloy4225 khashighstrengthandgreaterhardnesswhichis maintainedattemperaturesupto2OOOC. Itis goodfor pressuretightness. C-2.7Alloy4300 Ithasgoodresistancetochemicalandatmospheric attack.Itiswidelyusedforelectricalhousehold appliances,forexample,steam-irons,waffleirons, electricfloorpolishersandvacuumcleaners.Alsoused forutensilsandarchitecturalcastings. C-2.8Alloy4323 Itisspeciallysuitableforcastingsrequiredtohavea combination,intheas-castconditions,ofhighproof stressandhardnesswithgoodmachinabilityandcas- tability.Itgetsagedatroomtemperatureandis/cry goodforheavydutyautomotiveparts. C-2.9Alloy4525 Possessesgoodstrengthatelevatedtemperaturesand lowcoefficientofexpansion.Usedforlowpressuredie castingssuchasscootercomponents. C-2.10Alloy4635 Ithasafluidityandcorrosionresistanceofalloy4300 withhighermechanicalstrengthandhardness.Itis extensivelyusedforlowpressurediecastingssuchas scooterparts. c-2.11Alloy4652 Lowthermalexpansionandgoodstrengthatelevated temperatures.Usedforpistons,mainlyforinternal combustionengines. C-2.12Alloy5230 Excellentresistancetocorrosionandexcellentsurface finishmakesitsuitableforcastingsformarine,food processinganddecorativeapplications.Itisthemost suitablealloyfordecorativeanodizing.Typical applicationsarewindowhardware,ashtraysand ornamentalhardware.Thealloyis susceptibleto oxida- tioninmoltenconditionandhashighshrinkage. C-2.13Alloy5500 Wh-nsolutiontreated,thisalloyhasthehighesttensile strengthandgoodshockresistancetogetherwithexcel- lentcorrosionresistanceandmachinability.Suitable forcastingsrequiringmaximumtoughness.Typical applicationsarehighlystressedcastingsusedinmarine andminingequipments. Thealloybecomessusceptibletostresscorrosionat highertemperatureifsubjectedtostressesinex- cessof designloads.Thealioyrequiresspecialfoundry techniquestoensureinternalsoundnessandchemical compositionlimits. 1L Bur eauof IndianStandards BISisastatutoryinstitutionestablishedundertheBureauofIndianSturzdurdsAct,1986topromote harmoniousdevelopmentoftheactivitiesofstandardizatitm,markingandqualitycertificationofgoodsand attendingtoconnectedmattersinthecountry. Copyright BIShasthecopyrightofallitspublications.Nopartofthesepublicationsmayhcreproducedinanyform withoutthepriorpermissioninwritingofBIS.ThisdoesnotprecludethelrccUSC, inthecourseof implementingthestandard,ofnecessarydet;lils,suchassymbolsandsi./cs,typeorgradedesignations. EnquiriesrelatingtocopyrightheaddrcsscdtoihcDirector(Publication),BIS. ReviewofIndianStandards Amendmentsareissuedtostandardsasthericedarisesonthebasisofcomments.Standardsarcalsoreviewed periodically;astandardalongwithamendmentsisreaffirmedwhensuchreviewindicatesthatnochangesare needed;ifthereviewindicatesthatchangesarcneeded,itistakenuplorrevision.UsersofIndianSt;lndards shouldascertainthattheyarcinpossessionofthelatest;Imcnc!mcnts01editionbyreferringtotheIatcstissue ofBISHandbookandStandardsMonthlyAddition\. ThisIndianStandardhasbeendcvelopcdfromDot:No.MTD7(3150) AmendNo.DateofIssueTestAffcctcd Headquarters: BUREAUOFINDIANSTANDARDS ManakBhavan,Y BahodurShah&farM;lrg,NewDelhi110002 Telephones:3230131,3233375,323Y4 02 RegionalOffices: Tclcgramx:M;tnakx;~nxth;~ (Commontoallolliccs) rclcphonc Central: Eastern: Northern: Southern: Western: Bran&s: ManakBhavan,9BahadurShahZafarMarg NEWDELHI110002 l/14C.I.T.SchemeVIIM,V.I.P.Ro: ~d. 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