YST 1374-2020《Ultrafine molybdenum powder超细钼粉》规范

1

YS/T1374—2020

ICS77.150.99H63

YS

NonferrousMetalIndustryStandardofthePeople'sRepublicofChina

YS/T1374-2020

Ultrafinemolybdenumpowder超细钼粉

（EnglishTranslation）

（报批稿）

Issuedate：2020-12-09Implementationdate：2021-04-01

IssuedbyMinistryofIndustryandInformationTechnologyofthePeople’sRepublicofChina

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YS/T1374—2020

Foreword

SAC/TC243isinchargeofthisEnglishtranslation.IncaseofanydoubtthecontentsofEnglishtranslation,theChineseoriginalshallbeconsideredauthoritatively.

ThisstandardisdraftedinaccordancewiththerulesgivenintheGB/T1.1-2009.

ThisstandardwasproposedandpreparedbySAC/TC243NationalTechnicalCommitteeonNonferrousMetalsStandardizationAdministrationofChina.

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YS/T1374—2020

Ultrafinemolybdenumpowder

1Scope

Thisstandardspecifiesthetechnicalrequirements,testmethods,inspectionrules,marking,packaging,transport,storage,qualitycertificateandpurchaseorder(orcontract)contentofultrafinemolybdenumpowder。

Thisstandardisapplicabletoultrafinemolybdenumpowderproducedwithhydrogenreductionmethod.

2Normativereferences

Thefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditionscitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

GB/T1479.2,Metallicpowders—Determinationofapparentdensity—Part2:Scottvolumetermethod

GB/T3249,TestmethodforfishernumberofmetalpowdersandrelatedcompoundsGB/T4325(Allparts),Methodsforchemicalanalysisofmolybdenum

GB/T5314,Powdersforpowdermetallurgicalpurposes-Sampling

GB/T8170，Rulesofroundingofffornumericalvalues&expressionandjudgementoflimitingvalues

3Technicalrequirements

3.1Productdesignation

UltrafinemolybdenumpowdersareclassifiedintotwodesignationsasXFMo-1andXFMo-2accordingtoFisherparticlesizes.XFMo-1molybdenumpowderisusedtoproducefinemolybdenumproducts,andXFMo-2molybdenumpowderisusedasanactivecatalyticadditive.

3.2Chemicalcomposition

ThechemicalcompositionofproductsshallbeasspecifiedinTable1.

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YS/T1374—2020

Table1—Chemicalcomposition

(Massfraction,%）

Elements

XFMo-1

XFMo-2

Mocontent/notlessthan

99.95

99.92

Impurity

Content

/

notmorethan

Pb

0.0005

0.0005

Bi

0.0005

0.0005

Sn

0.0005

0.0005

Sb

0.0010

0.0010

Cd

0.0010

0.0010

Ti

0.0010

-

Mn

0.0005

-

As

0.0010

-

Cr

0.0030

-

Fe

0.0050

0.0100

Ni

0.0020

0.0020

Cu

0.0010

0.0010

Al

0.0015

0.0050

Ca

0.0015

0.0040

Mg

0.0020

0.0020

W

0.0200

0.0200

Si

0.0020

0.0100

P

0.0010

0.0050

C

0.0050

0.0100

O

0.2500

0.4000

Note:Molybdenumcontentiscalculatedbythemethodofimpurityreduction(excludinggaselementssuchasCandO).

3.3Fisherparticlesize

TheFisherparticlesizeofXFMo-1shallbe＞1.0μm～2.5μm,andtheFisherparticlesizeofXFMo-2shallbe0.5μm～1.0μm.

3.4Apparentdensity

Theapparentdensityofproductshallbe0.3g/cm3～1.2g/cm3.3.5Appearancequality

Theproductshallbeindarkgrayorblackgrayloosepowderswithoutcakingor

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YS/T1374—2020

visibleimpurities.

4TestMethods

4.1ThechemicalanalysisoftheproductshallbecarriedoutaccordancetoGB/T4325.

4.2TheFisherparticlesizerangeoftheproductshallbedeterminedinaccordancewithGB/T3249.

4.3TheapparentdensityoftheproductshallbedeterminedinaccordancewithGB/T1479.2.

4.4Theappearancequalityoftheproductshallbeinspectedvisually.

5Inspectionrules

5.1Inspectionandacceptance

5.1.1Theproductshallbeinspectedbyqualityinspectiondepartmentandthequalitycertificateshallbefilledoutthequalitycertificatetoensurethequalityoftheproductinaccordancewiththisstandard(orordercontract).

5.1.2Thepurchasersshallinspectthereceivedproductsinaccordancewiththisstandard.Ifthetestingresultsdonotcomplywiththisdocument,notificationofthediscrepanciesshallbeinformedtosupplierwithin45daysfromthedatereceivingtheproductsorthetimestipulatedinthesalescontractandberesolvedthroughnegotiationbetweenthesupplierandpurchaser.Incaseofanyarbitration,thearbitratedmaterialshallbenotlessthan60%ofthislotofproduct.Thearbitrationsamplingshallbeconductedbilaterallyonspotofgoodsdeposited.Arbitrationinstitutionshallbeagreedbetweenthesupplierandthepurchaser.

5.2Lots

Productsshallbesubmittedforacceptanceinlots,andeachlotshallbecomposedofthesamedesignation,productionprocessandmixture,Theweightofeachlotshallbeagreedbetweensupplierandpurchaser.

5.3Inspectionitemsandsampling

TheinspectionitemsandsamplingshallbeasspecifiedinTable2.

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YS/T1374—2020

Table2—Inspectionitemsandsampling

Inspectionitems

Sampingrule

Clausenumberoftherequirements

Clausenumberofthetestmethods

Chemicalcomposition

GB/T5314

3.2

4.1

Fisherparticlesize

3.3

4.2

ApparentDensity

3.4

4.3

Appearancequality

3.5

4.4

5.4Inspectionresultsjudgement

5.4.1TheroundingandjudgementofthetestresultshallbeaccordencewithGB/T

8170.

5.4.2Ifchemicalcompositionofproductisunqualified,doubleamountsofsamplesshouldbetakenforretest,Ifanyresultoftheretestremainsunqualified,thislotofproductsshallbejudgedasunqualified.

5.4.3IfFisherparticlesizeorapparentdensityisunqualified,doubleamountsofsamplesshouldbetakenforretest,Ifanyresultoftheretestremainsunqualified,thislotofproductsshallbejudgedasunqualified.

5.4.4Ifappearanceisunqualified,thislotshallbejudgedasunqualified.

6Marking,packaging,transport,storageandqualitycertificate

6.1Marking

Theexteriorpackageofproductsshallinclude:suppliername,productname,designation,lotnumber,netweight.

6.2Packaging

Productshallbepackagedinvacuumbags.Eachbagshallbenotmorethan5kg,Desiccantshouldbeplacedoutsideofthevacuumbag.Thevacuumbagsshallbeplacedinironpaillinedwithfoam.Thenetweightperpailshallbenotmorethan20kg.Incaseofspecialrequirements,thepackagemethodshallbeagreedbetweenmutualnegotiation.

6.3Transport

Productshallbekeptawayfrommoistureandviolentcollisionduringtransport.6.4Storage

Productshallbestoredindry,ventilatedandnoacid