SAE J478 Slotted and Recessed Head Screws (Cancelled Jan 1990)

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Product Code:SAE J478
Title:Slotted and Recessed Head Screws (Cancelled Jan 1990)
Issuing Committee:Fasteners Committee
Scope:Included herein are complete general and dimensional data for the types of slotted and recessed head machine, tapping, and wood screws, and slotted capscrews recognized as SAE Standard. Also included are performance data for tapping screws and appendixes which provide instructions for protrusion gaging flat heads, penetration gaging of recessed heads, across corners gaging of hexagon heads, recommended hole sizes for tapping screws, and a cross reference of tapping screw type designations. The inclusion of dimensional data in this standard is not intended to imply that all of the products described are stock production sizes. Consumer interests are requested to consult with manufacturers concerning lists of stock production sizes.
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【英文标准名称】:SeamlessNickelandNickelAlloyCondenserandHeat-ExchangerTubes
【原文标准名称】:冷凝器及热交换器用无缝镍和镍合金管
【标准号】:ASTMB163-1993
【标准状态】:作废
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:管;合金;有色金属;无缝管;热交换器;蒸汽冷凝器;冷凝器;镍
【英文主题词】:pipes;alloys;seamlesspipes;nickel;condensers;steamcondensers;non-ferrousmetals;heatexchangers
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:77_120_40
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforCharacterizingDuplexGrainSizes
【原文标准名称】:双重晶粒度表征的标准试验方法
【标准号】:ASTME1181-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:E04.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:areafraction;banding;bands;duplex;grainsize;necklace;Alloys;Areafractions;Banding;Bimodaldistribution;Comparisontechniques;Crystallatticestructure;Distribution;Duplexgrainstructures;Etching(materials/process);Grainsize;Imageana
【摘要】:Duplexgrainsizemayoccurinsomemetalsandalloysasaresultoftheirthermomechanicalprocessinghistory.Forcomparisonofmechanicalpropertieswithmetallurgicalfeatures,orforspecificationpurposes,itmaybeimportanttobeabletocharacterizegrainsizeinsuchmaterials.Assigninganaveragegrainsizevaluetoaduplexgrainsizespecimendoesnotadequatelycharacterizetheappearanceofthatspecimen,andmayevenmisrepresentitsappearance.Forexample,averagingtwodistinctlydifferentgrainsizesmayresultinreportingasizethatdoesnotactuallyexistanywhereinthespecimen.Thesetestmethodsmaybeappliedtospecimensorproductscontainingrandomlyintermingledgrainsoftwoormoresignificantlydifferentsizes(henceforthreferredtoasrandomduplexgrainsize).Examplesofrandomduplexgrainsizesinclude:isolatedcoarsegrainsinamatrixofmuchfinergrains,extremelywidedistributionsofgrainsizes,andbimodaldistributionsofgrainsize.Thesetestmethodsmayalsobeappliedtospecimensorproductscontaininggrainsoftwoormoresignificantlydifferentsizes,butdistributedintopologicallyvaryingpatterns(henceforthreferredtoastopologicalduplexgrainsizes).Examplesoftopologicalduplexgrainsizesinclude:systematicvariationofgrainsizeacrossthesectionofaproduct,necklacestructures,bandedstructures,andgerminativegraingrowthinselectedareasofcriticalstrain.Thesetestmethodsmaybeappliedtospecimensorproductsregardlessoftheirstateofrecrystallization.Becausethesetestmethodsdescribedeviationsfromasingle,log-normaldistributionofgrainsizes,andcharacterizepatternsofvariationingrainsize,thetotalspecimencross-sectionmustbeevaluated.Thesetestmethodsarelimitedtoduplexgrainsizesasidentifiablewithinasinglepolishedandetchedmetallurgicalspecimen.Ifduplexgrainsizeissuspectedinaproducttoolargetobepolishedandetchedasasinglespecimen,macroetchingshouldbeconsideredasafirststepinevaluation.Theentiremacroetchedcross-sectionshouldbeusedasabasisforestimatingareafractionsoccupiedbydistinctgrainsizes,ifpossible.Ifmicroscopicexaminationissubsequentlynecessary,individualspecimensmustbetakentoallowestimationofareafractionsfortheentireproductcross-section,andtoallowdeterminationofgrainsizesrepresentingtheentirecross-sectionaswell.Thesetestmethodsareintendedtobeappliedtoduplexgrainsizes.Duplexgrainstructures(forexample,multiphasealloys)arenotnecessarilyduplexingrainsize,andassucharenotthesubjectofthesemethods.However,thetestmethodsdescribedhereforareafractionestimationmaybeofuseindescribingduplexgrainstructures.1.1Thesetestmethodsprovidesimpleguidelinesfordecidingwhetheraduplexgrainsizeexists.Thetestmethodsseparateduplexgrainsizesintooneoftwodistinctclasses,thenintospecifictypeswithinthoseclasses,andprovidesystemsforgrainsizecharacterizationofeachtype.1.2Units8212;ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoconsultappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortoitsuse.
【中国标准分类号】:A42
【国际标准分类号】:19_120
【页数】:15P.;A4
【正文语种】:英语