ASTM E32-1986(2006)e1 测定化学成分用铁合金及钢添加剂的取样
作者:标准资料网 时间:2024-05-16 20:51:31 浏览:9762
来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:StandardPracticesforSamplingFerroalloysandSteelAdditivesforDeterminationofChemicalComposition
【原文标准名称】:测定化学成分用铁合金及钢添加剂的取样
【标准号】:ASTME32-1986(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1986
【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】:E01.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:抽样方法;铁合金;钢;工艺;金属;试样;添加剂;化学成分
【英文主题词】:chemicalcomposition;ferroalloys;sampling;steeladditives
【摘要】:Thesepracticesforthesamplingofmetalsandalloysareprimarilyintendedtotestsuchmaterialsforcompliancewithcompositionalspecifications.Itisassumedthatallwhousethesemethodswillbetrainedsamplerscapableofperformingcommonsamplingproceduresskillfullyandsafely.1.1Thesepracticesincludeproceduresforthesamplingofthevariousferroalloysandsteeladditives,eitherbeforeoraftershipmentfromtheplantsofthemanufacturers.Theyaredesignedtogiveresultsrepresentativeofeachlotthatwillbecomparablewiththemanufacturer''sguaranteedanalysisforthesamelot.Forcheckanalysis,thepurchasermayuseanysamplingprocedurehedesires,buttheanalyticalresultsobtainedonsuchsamplesshallnotbeabasisforcomplaintorrejection,unlesstheprocedurefollowedisofanaccuracyequivalenttothatprescribedinthesemethods.1.2Insamplingferroalloysandsteeladditives,seriouserrorsoftenoccurfromcontaminationofthesamplesbyironfromthesamplingappliances.Therefore,specialprecautionsshouldbeobservedtoavoidthissourceoferror.Metallicironmayberemovedwithamagnetfromnonmagneticalloys;itsestimationinotheralloysrequiresspecialanalyticalprocedures(Note0).Toavoidthiserror,partsofcrushersandpulverizingequipmentcontactingthesamplesshallbeofsteelorothermaterialshowingahighresistancetoabrasionofthetypeinvolved.Note0Metallicironinferrochromiumandferrosiliconmaybedeterminedasfollows:Transfer5gofthesampleofalloytoa150-mLbeaker,add25mLofHNO3(1+3),cover,boil5min,filterintoa250-mLbeaker,andwashwithhotwater.AddNH4OHinslightexcess,heattoboiling,filter,andwashwithhotwater.DissolvetheprecipitateonthepaperwithaminimumquantityofhotHCl(1+2),washthefilterwithhotwater,andtitratetheironbyastandardproceduresuchasthatdescribedinTestMethodE354.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundvaluesinparenthesisaregivenforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H11
【国际标准分类号】:77_040_30;77_100
【页数】:5P.;A4
【正文语种】:
【原文标准名称】:测定化学成分用铁合金及钢添加剂的取样
【标准号】:ASTME32-1986(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1986
【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】:E01.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:抽样方法;铁合金;钢;工艺;金属;试样;添加剂;化学成分
【英文主题词】:chemicalcomposition;ferroalloys;sampling;steeladditives
【摘要】:Thesepracticesforthesamplingofmetalsandalloysareprimarilyintendedtotestsuchmaterialsforcompliancewithcompositionalspecifications.Itisassumedthatallwhousethesemethodswillbetrainedsamplerscapableofperformingcommonsamplingproceduresskillfullyandsafely.1.1Thesepracticesincludeproceduresforthesamplingofthevariousferroalloysandsteeladditives,eitherbeforeoraftershipmentfromtheplantsofthemanufacturers.Theyaredesignedtogiveresultsrepresentativeofeachlotthatwillbecomparablewiththemanufacturer''sguaranteedanalysisforthesamelot.Forcheckanalysis,thepurchasermayuseanysamplingprocedurehedesires,buttheanalyticalresultsobtainedonsuchsamplesshallnotbeabasisforcomplaintorrejection,unlesstheprocedurefollowedisofanaccuracyequivalenttothatprescribedinthesemethods.1.2Insamplingferroalloysandsteeladditives,seriouserrorsoftenoccurfromcontaminationofthesamplesbyironfromthesamplingappliances.Therefore,specialprecautionsshouldbeobservedtoavoidthissourceoferror.Metallicironmayberemovedwithamagnetfromnonmagneticalloys;itsestimationinotheralloysrequiresspecialanalyticalprocedures(Note0).Toavoidthiserror,partsofcrushersandpulverizingequipmentcontactingthesamplesshallbeofsteelorothermaterialshowingahighresistancetoabrasionofthetypeinvolved.Note0Metallicironinferrochromiumandferrosiliconmaybedeterminedasfollows:Transfer5gofthesampleofalloytoa150-mLbeaker,add25mLofHNO3(1+3),cover,boil5min,filterintoa250-mLbeaker,andwashwithhotwater.AddNH4OHinslightexcess,heattoboiling,filter,andwashwithhotwater.DissolvetheprecipitateonthepaperwithaminimumquantityofhotHCl(1+2),washthefilterwithhotwater,andtitratetheironbyastandardproceduresuchasthatdescribedinTestMethodE354.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundvaluesinparenthesisaregivenforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H11
【国际标准分类号】:77_040_30;77_100
【页数】:5P.;A4
【正文语种】:
下载地址: 点击此处下载
