【英文标准名称】:Informationprocessingsystems-Telecommunicationsandinformationexchangebetweensystems-EndsystemtoIntermediatesystemrouteingexchangeprotocolforuseinconjunctionwiththeProtocolforprovidingtheconnectionless-modenetworkservice(ISO
【原文标准名称】:信息处理系统.系统间远程通信和信息交换.与提供无连接方式网络服务协议(ISO8474)联合使用的端系统到中间系统路由选择交换协议.修改件1:附加组合成信息
【标准号】:ISO9542AMD1-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-09
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:开放系统互连;数据处理;网络互连;组分;信息交流;信息技术;信息交换;记录;终端系统;网络服务;发送;无连接;电信;系统;集体交流;通信规程
【英文主题词】:
【摘要】:
【中国标准分类号】:M11
【国际标准分类号】:35_100_30
【页数】:13P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforTensionTestingofMetallicMaterials
【原文标准名称】:金属材料抗拉的标准试验方法
【标准号】:ASTME8/E8M-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:准确度
【英文主题词】:accuracy;bendingstress;discontinuousyielding;drop-of-the-beam;eccentricforceapplication;elasticextension;elongation;extension-under-load;extensometer;force;free-runningcrossheadspeed;gagelength;halt-of-theforce;percentelo
【摘要】:Tensiontestsprovideinformationonthestrengthandductilityofmaterialsunderuniaxialtensilestresses.Thisinformationmaybeusefulincomparisonsofmaterials,alloydevelopment,qualitycontrol,anddesignundercertaincircumstances.Theresultsoftensiontestsofspecimensmachinedtostandardizeddimensionsfromselectedportionsofapartormaterialmaynottotallyrepresentthestrengthandductilitypropertiesoftheentireendproductoritsin-servicebehaviorindifferentenvironments.Thesetestmethodsareconsideredsatisfactoryforacceptancetestingofcommercialshipments.Thetestmethodshavebeenusedextensivelyinthetradeforthispurpose.1.1Thesetestmethodscoverthetensiontestingofmetallicmaterialsinanyformatroomtemperature,specifically,themethodsofdeterminationofyieldstrength,yieldpointelongation,tensilestrength,elongation,andreductionofarea.1.2Thegagelengthsformostroundspecimensarerequiredtobe4DforE8and5DforE8M.ThegagelengthisthemostsignificantdifferencebetweenE8andE8MTestSpecimensTestspecimensmadefrompowdermetallurgy(P/M)materialsareexemptfromthisrequirementbyindustry-wideagreementtokeepthepressingofthematerialtoaspecificprojectedareaanddensity.1.3Exceptionstotheprovisionsofthesetestmethodsmayneedtobemadeinindividualspecificationsortestmethodsforaparticularmaterial.Forexamples,seeTestMethodsandDefinitionsA370andTestMethodsB557,andB557M.1.4Roomtemperatureshallbeconsideredtobe10to38x00B0;C[50to100x00B0;F]unlessotherwisespecified.1.5ThevaluesstatedinSIunitsaretoberegardedasseparatefrominch/poundunits.Thevaluesstatedineachsystemarenotexactequivalents;thereforeeachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:27P.;A4
【正文语种】:英语