【英文标准名称】:StandardTestMethodforDeterminationofBenzene,Toluene,Ethylbenzene,p/m-Xylene,o-Xylene,CandHeavierAromatics,andTotalAromaticsinFinishedGasolinebyGasChromatography
【原文标准名称】:气相色谱法测定精炼汽油中苯、甲苯、乙苯、对/间-二甲苯、邻二甲苯、C、重芳烃和全部芳烃的标准试验方法
【标准号】:ASTMD5580-2002
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:芳烃;苯;乙苯;气相色谱法;汽油;石油产品;试验;甲苯;二甲苯
【英文主题词】:Aromatichydrocarbons;Benzene;Ethylbenzene;Gaschromatography;Gasoline;Petroleumproducts;Tests;Toluene;Xylene
【摘要】:
【中国标准分类号】:G16
【国际标准分类号】:75_160_20
【页数】:9P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforNonmetallicInclusionContentofPowdersIntendedforPowderForging(PF)Applications
【原文标准名称】:粉末锻造(PF)用非金属杂质含量的测定用标准试验方法
【标准号】:ASTMB796-2007
【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】:B09.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:低合金钢;金相学;冶金;非金属夹杂物;测试
【英文主题词】:nonmetallicinclusions;powderforged(PF)steelparts
【摘要】:Theextensiveporositypresentinpressedandsinteredferrousmaterialsmaskstheeffectofinclusionsonmechanicalproperties.Incontrast,thepropertiesofmaterialpowderforgedtonearfulldensityarestronglyinfluencedbythecomposition,size,sizedistribution,andlocationofnonmetallicinclusions.Thetestfornonmetallicinclusionsinpowderforgedsteelsisusefulasthefollowing:Characteristictoclassifyordifferentiateonegradeofpowderfromanother.Meansofqualitycomparisonofpowdersintendedforpowderforging,lottolot.Significantvariationsinnonmetallicinclusioncontentwilloccurif:Thepowderusedtoformthetestspecimendoesnotmeetpowderforgingqualitystandardsfornonmetallicinclusioncontent.Processingofthepowderforgedtestspecimenhasbeencarriedoutunderconditionsthatdonotpermitoxidereductionorallowoxidationofthetestspecimen,orboth.1.1Thistestmethodcoversametallographicmethodfordeterminingthenonmetallicinclusionlevelofpowdersintendedforpowderforging(PF)applications.1.2Thetestmethodcoversrepresspowderforgedtestspecimensinwhichtherehasbeenminimallateralmaterialflow(1%).Thecoreregionofthepowderforgedtestspecimenshallcontainnoporositydetectableat100.1.3Thistestmethodisnotsuitablefordeterminingthenonmetallicinclusionlevelofpowderforgedtestspecimensthathavebeenforgedsuchthatthecoreregioncontainsporosity.Atthemagnificationusedforthistestmethodresidualporosityishardtodistinguishfromoxideinclusions.Toomuchresidualporositymakesameaningfulassessmentoftheinclusionpopulationimpossible.1.4Thetestmethodmaybeappliedtomaterialsthatcontainmanganesesulfide(admixedorprealloyed)providedthenearneighborseparationdistanceischangedfrom30mto15m.Note1Thetestmethodmaybeappliedtopowderforgedpartswheretherehasbeenagreateramountofmaterialflowprovided:Thenearneighborseparationdistanceischanged,orTheinclusionsizesagreedbetweenthepartiesareadjustedfortheamountofmaterialflow.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H70
【国际标准分类号】:77_040_99
【页数】:3P.;A4
【正文语种】:
基本信息
| 标准名称： | 船体修理技术要求 底部构件的换新及拆装 |
| 英文名称： | Technical requirements for hull repairing -Renewal or dismantling and refitting of bottom structure |
| 中标分类： |
公路、水路运输 >>
船舶维护与修理 >>
船体与舾装维护修理 |
| 替代情况： | JT 4011-1979 |
| 发布日期： | 1993-05-08 |
| 实施日期： | 1993-11-01 |
| 首发日期： | |
| 作废日期： | 2005-09-21 |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 公路 水路运输 船舶维护与修理 船体与舾装维护修理