Product Code:SAE J437
Title:Selection and Heat Treatment of Tool and Die Steels
Issuing Committee:Metals Technical Executive Steering Committee
Scope:The information in this report covers data relating to SAE J438, Tool and Die Steels, and is intended as a guide to the selection for the steel best suited for the intended purpose and to provide recommended heat treatments and other data pertinent to their use.Specific requirements as to physical properties are not included because the majority of tool and die steels are either worked or given special heat treatments by the purchaser. The purchaser may or may not elect to use the accompanying data for specification purposes.【英文标准名称】:StandardTestMethodforTotalMoistureinCoal
【原文标准名称】:煤炭中总水分的标准试验方法
【标准号】:ASTMD3302/D3302M-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D05.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:air-drying;air-dryingloss;coal;residualmoisture;totalmoisture;Coalproducts--moisture;Heatingtests--coal/coke;Moistureanalysis--coal/coke;Totalmoistureanalysis
【摘要】:Thecollectionandtreatmentofthesampleasspecifiedfortherefereemethodisintendedfortheexpresspurposeofdeterminingthetotalmoistureincoal.Thestandardisavailabletoproducers,sellers,andconsumersasamethodofdeterminationwhenothertechniquesormodificationsarenotmutuallyagreedupon.Thecommercialmethod,whichdeterminestotalmoisturecontentofthecrushedanddividedsample,isdesignatedasthemethodfortotalmoistureforroutinecommercialpractice.1.1Thistestmethodcoversthemeasurementofthetotalmoistureincoalasitexistsatthesite,atthetime,andundertheconditionsitissampled.Itisapplicabletocoalsasmined,processed,shipped,orusedinnormalcommercialpursuits.Itisnotapplicabletocoal-waterslurries,sludges,orpulverizedproductsunder0.5-mm-diametersievesize.Itisapplicabletocoalsofallrankswithintherecognizedlimitationsimposedbyoxidationanddecompositioncharacteristicsoflowerrankcoals.Becauseofitsempiricalnature,strictadherencetobasicprinciplesandpermissiveproceduresarerequiredforvalidresults(seeAppendixX1).Thiscompletestandardisavailabletoproducers,sellers,andconsumersasatotalmoisturemethodwhenotherproceduresormodificationsarenotmutuallyagreedon.1.2Sincecoalcanvaryfromextremelywet(water-saturated)tocompletelydry,specialemphasismustbeplacedonthesampling,samplepreparation,andthemoisturedeterminationitselftoensuretotalreliabilityofmeasurement.Therefore,thisstandardentailscollectionofthegrosssample,samplepreparation,andthemethodofdetermination.1.3Whileitisrecognizedthatsuchastandardmaybeunwieldyforroutineusageincommercialoperations,itcanprovideacommonbaseforagreementincasesofdisputeorarbitration.Thecompletestandardisreferredtoastherefereemethod.Embodiedinthestandardisthecommercialmethodstartingwiththecrushedanddividedsamplewhenthegrosssampleisnottoowettocrushanddivide.SeeTestMethodsD2961andD3173forothermoisturemethods.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:D21
【国际标准分类号】:75_160_10
【页数】:7P.;A4
【正文语种】:英语