ASTM A532(2)

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prescribedinTable1forthatclassandtype.

6.2Spectrographic,X-ray,orwetchemicallaboratorytech-

niquesareacceptableforroutineandcontroldeterminations,

butshallbestandardizedagainst,andgiveessentiallythesame

resultsas,theumpiremethodsspeci edin6.3ofthisspeci -

cation.

6.3Incaseofdispute,umpiredeterminationsofthechemi-

calanalysisofthemetalshallbemadeusingASTMstandard

methodsdetailedasfollows:

6.3.1ThefollowingisinaccordancewithTestMethods

E351:

6.3.1.1Carbon,TotalbytheCombustionGravimetric

Method.

6.3.1.2ChromiumbythePoroxydisulfate-OxidationTitri-

metricMethod.

6.3.1.3CopperbytheSul dePrecipitation-

ElectrodepositionGravimetricMethod.

6.3.1.4ManganesebythePeroxydisulfate-ArseniteTitri-

metricMethod.

6.3.1.5NickelbytheDimethylglyoximeGravimetric

Method.6.3.1.6PhosphorusbytheMolybdenumBluePhotometricMethod.6.3.1.7SulfurbytheCombustion-IodateTitrationMethod.6.3.2ThefollowingisinaccordancewithTestMethodsE350:6.3.2.1MolybdenumbythePhotometricMethod.7.Microstructure7.1Thealloyscoveredbythisspeci cationareexpectedtohavemicrostructuresthatconsistessentiallyofcarbides,mar-tensite,bainite,austenite;andinexceptionalcasesminoramountsofgraphiteorpearlite.7.2Themicrostructurewillnotberoutinelydeterminednorreportedexceptinaccordancewithspecialagreementbetweenthemanufacturerandthepurchaser,orincasesofdispute.8.HardnessRequirements8.1Thecastingsshallconformtothehardnessrequirementsspeci edinTable2.8.2Thehardnesstestshallbeperformedontheoriginalsurfaceofthecastingorupto1 8in.(3mm)belowthatsurface.9.HardnessMethod9.1Performthehardnesstestinaccordancewithoneofthe

followingmethodstobespeci edbythepurchaser:

9.1.1TestMethodE10(Brinell)usingatungstencarbide

balland3000kgfload,

9.1.2TestMethodE18(Rockwell)usingadiamondcone

penetrator,150kgfload,andtheRockwellCScale,or

9.1.3TestMethodE92(Vickers).

10.Keywords

10.1abrasionresistant;alloyedcastiron;castiron;white

castiron

TABLE1ChemicalRequirements,Weight%Class

I

I

I

I

II

II

II

IIITypeABCDABDADesignationNi-Cr-HcNi-Cr-LcNi-Cr-GBNi-HiCr12%Cr15%Cr-Mo20%Cr-Mo25%CrCarbon2.8–3.62.4–3.02.5–3.72.5–3.62.0–3.32.0–3.32.0–3.32.0–3.3Manganese2.02.02.02.02.02.02.02.0

maxmaxmaxmaxmaxmaxmaxmaxSilicon0.8max0.8max0.8max2.0max1.5max1.5max1.0–2.21.5maxNickel3.3–5.03.3–5.04.0max4.5-7.02.5max2.5max2.5max2.5maxChromium1.4–4.01.4–4.01.0–2.57.0–11.011.0–14.014.0–18.018.0–23.023.0–30.0Molyb-denum1.01.01.01.53.03.03.03.0maxmaxmaxmaxmaxmaxmaxmaxCopper............1.2max1.2max1.2max1.2maxPhos-phorus0.3max0.3max0.3max0.10max0.10max0.10max0.10max0.10maxSulfur0.150.150.150.150.060.060.060.06maxmaxmaxmaxmaxmaxmaxmax

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