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【英文标准名称】:StandardSpecificationforCastings,SteelandAlloy,CommonRequirements,forGeneralIndustrialUse
【原文标准名称】:一般工业用钢和合金铸件通用要求的标准规范
【标准号】:ASTMA781/A781M-2005
【标准状态】:作废
【国别】:美国
【发布日期】:2005
【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】:工业;规范(验收);铸件;合金;钢
【英文主题词】:industries;specification(approval);steels;castings;alloys
【摘要】:
【中国标准分类号】:J31
【国际标准分类号】:77_140_80
【页数】:13P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforRubberCompoundingMaterials8212DeterminationofParticleSizeDistributionofRecylcedVulcanizateParticulateRubber
【原文标准名称】:橡胶化合材料的标准试验方法.再回收颗粒硫化橡胶粒径分布的测定
【标准号】:ASTMD5644-2001
【标准状态】:现行
【国别】:
【发布日期】:2001
【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】:D11.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:粒度;粒径分析;橡胶;橡胶制品;试验
【英文主题词】:particlesizedistribution;ultrasoniclightopticalmicroscopictechnique;
【摘要】:Theparticulatesizedistributionofvulcanizateparticulaterubberisusedforthepurposeofassigningaproductmeshoraverageparticlesizedesignation.TheproductdesignationformeshsizefortheRo-tapmethod(MethodA,asfollows)isbasedonthesizedesignationscreenwhichallowsarangefortheupperlimitretainedofmaximum5%forupto850x03BC;m(20mesh)particles,maximum10%for600to150x03BC;m(30to100mesh),andmaximum15%for128to75x03BC;m(120to200mesh).Norubberparticlesshallberetainedonthezeroscreen(seeTable1,ClassificationD5603).ForMethodA,theweightpercentretainedonaspecificscreenisnotedwhereasinMethodB(ultrasonictechnique),thenumberofparticlesataparticularsizeiscounted.MethodBaddressesproblemsthatmaybecausedbytackinessandstaticelectricalforcesthatrecycledrubberparticlesexertoneachothertoformagglomerates,especiallyfor80meshorfinerparticles.Thismethodeliminatesagglomerateformationbyultrasonicallydispersingtheparticles.Bothmethodscanbeusedasaqualitycontroltool.1.1Thesetestmethodsdescribetheproceduresfordeterminingaverageparticlesizedistributionofrecycledvulcanizateparticulate.1.2MethodAdescribestheRo-tapsievetestmethodfor60meshorcoarserparticles.1.3MethodBdescribestheultrasonictechniquecombinedwithopticalmicroscopeespeciallysuitablefor80meshorfinerparticles.ThisprocedureisbasedonTestMethodD3849.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:4P.;A4
【正文语种】: