【英文标准名称】:Aerospaceseries-MagnesiumalloyMG-W68001-Fillermetalforwelding;Wireandrod;GermanversionEN4340:2002
【原文标准名称】:航空航天系列.镁合金MG-W68001.焊接填充金属:线材和棒材;德文版本EN4340:2002
【标准号】:EN4340-2002
【标准状态】:现行
【国别】:
【发布日期】:2002-07
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:作标记;化学成分;航天运输;多语种的;金属线;材料;航空运输;航空航天运输;特性;规范(验收);额定值;焊接填充金属;焊接;棒材;镁;镁合金;填充金属;合金
【英文主题词】:Aerospacetransport;Airtransport;Alloys;Bars(materials);Chemicalcomposition;Fillermetal;Magnesium;Magnesiumalloys;Marking;Materials;Multilingual;Properties;Ratings;Spacetransport;Specification(approval);Welding;Weldingfillermetals;Wires
【摘要】:
【中国标准分类号】:V11
【国际标准分类号】:49_025_15
【页数】:7P.;A4
【正文语种】:英语
基本信息
标准名称: | 挤压型材合页片 |
中标分类: |
航空、航天 >>
航空器与航天器零部件 >>
管件、卡箍、密封件 |
替代情况: | HB 2-23-1976;被HB 2-23-1994代替 |
发布日期: | 1984-09-01 |
实施日期: | 1984-10-01 |
首发日期: | |
作废日期: | |
出版日期: | |
页数: | 2页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 航空 航天 航空器与航天器零部件 管件 卡箍 密封件
【英文标准名称】:StandardTestMethodforExposureofMembraneSwitchestoTemperatureandRelativeHumidity
【原文标准名称】:温度和相对湿度对薄膜开关影响的标准试验方法
【标准号】:ASTMF1596-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:F01.18
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:薄膜开关;实施规程;开关
【英文主题词】:membraneswitch;relativehumidity(RH);temperature
【摘要】:Changesintemperatureandhumidityduringshipping,storageorusecanaffectthevisualappearance,mechanicalintegrity,orelectricalfunctionalityofswitches.Thispracticesimulatesthreedifferentenvironmentstowhichmembraneswitchesmaybeexposed.Thethreeindustry-recognizedswitchcategoriesbasedonperformancelevelsareLevel1,Level2,andLevel3(seesection8.1).Additionally,theremaybecustomrequirementsthatvarybyapplication,therefore,theserequirementscanbedeterminedbycustomerandvendoragreementandbeestablishedasaLevel4.Thispracticedefinesthedurationofasinglecycle.Multiplecyclesmaybeappropriatedependingontherequirementsoftheapplication.^SCOPE:1.1Thistestmethodcoversaprocedurefortemperatureandhumiditycyclingofmembraneswitches.1.2Thistestmethodisperformedtoevaluatethepropertiesofmaterialsusedintheconstructionofmembraneswitchassembliesastheyareinfluencedbytheabsorptionanddiffusionofmoistureandmoisturevapor.Thisisanacceleratedenvironmentaltest,accomplishedbythecontinuousexposureofthetestspecimentohighrelativehumidityatanelevatedtemperature.Absorptionofmoisturebymanymaterialsresultsinswelling,whichdestroystheirfunctionalutility,causeslossofphysicalstrength,andchangesinothermechanicalproperties.Insulatingmaterialswhichabsorbmoisturemaysufferdegradationoftheirelectricalproperties.1.2.1Physicalchanges:1.2.1.1Differentialcontractionorexpansionratesorinducedstrainofdissimilarmaterials.1.2.1.2.Crackingofsurfacecoatings.1.2.1.3Leakingofsealedcompartments.1.2.1.4Deformationorfractureofcomponents.1.2.2Chemicalchanges:1.2.2.1Separationofconstituents.1.2.2.2Failureofchemicalagentprotection.1.2.3Electricalchanges:1.2.3.1Changesinelectronicandelectricalcomponents.1.2.3.2Electronicormechanicalfailuresduetorapidwaterofcondensateformation.1.2.3.3Excessivestaticelectricity.1.3Thistestmethodisnotintendedtobeathermalshockprocedure;arampratebetweentemperatureextremesshouldnotexceed2x00B0;C/min.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:K31
【国际标准分类号】:31_220_20
【页数】:3P.;A4
【正文语种】: