ASTM A 667/A 667M-1987 离心铸造的双金属(灰口及白口铸铁)柱体标准规范
作者:标准资料网 时间:2024-05-16 19:06:10 浏览:8126
来源:标准资料网
【英文标准名称】:StandardSpecificationforCentrifugallyCastDualMetal(GrayandWhiteCastIron)Cylinders
【原文标准名称】:离心铸造的双金属(灰口及白口铸铁)柱体标准规范
【标准号】:ASTMA667/A667M-1987
【标准状态】:现行
【国别】:美国
【发布日期】:1987
【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】:铸件;铸铁;铁;离心铸造
【英文主题词】:castings;cast-iron;iron;centrifugalcasting
【摘要】:
【中国标准分类号】:H41
【国际标准分类号】:77_140_80
【页数】:2P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforMeasurementofTransitionTemperaturesofPetroleumWaxesbyDifferentialScanningCalorimetry(DSC)
【原文标准名称】:差示扫描量热法(DSC)测量石油蜡转变温度的标准试验方法
【标准号】:ASTMD4419-1990(2005)
【标准状态】:现行
【国别】:
【发布日期】:1990
【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】:D02.10.0A
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:旋转栅门;石蜡;润滑剂;测量;蜡;试验;石油产品;温度
【英文主题词】:differentialscanningcalorimetry;petroleumwax;thermalproperties;transitiontemperature
【摘要】:DSCinaconvenientandrapidmethodfordeterminingthetemperaturelimitswithinwhichawaxundergoesduringtransitions.Thehighesttemperaturetransitionisasolid-liquidtransitionassociatedwithcompletemelting;itcanguidethechoiceofwaxstorageandapplicationtemperatures.Thesolid-solidtemperaturetransitionisrelatedtothepropertiesofthesolid,thatis,hardnessandblockingtemperature.Note28212;Forarelativelynarrowcutpetroleumwax,thelowesttransitionwillbeasolid-solidtransition.Anarrowcutwaxisoneobtainedbydeoilingasinglepetroleumdistillatewithamaximumrangeof120x00B0;Fbetweenits5%and95%volinaccordancewithTestMethodD1160boilingpoints(convertedto760torr).TheDSCmethodcannotdifferentiatebetweensolid-liquidandsolid-solidtransitions.Suchinformationmustbepredeterminedbyothertechniques.Inthecaseofblends,thelowertemperaturetransitionmaybeenvelopesofbothsolid-liquidandsolid-solidtransitions.Sincepetroleumwaxisamixtureofhydrocarbonswithdifferentmolecularweights,itstransitionsoccuroveratemperaturerange.Thisrangeisonefactorthatinfluencesthewidth,expressedinx00B0;C,oftheDSCpeaks.Thehighesttemperaturetransitionisafirst-ordertransition.If,foraseriesofwaxes,thereissupportingevidencethatthehighesttemperaturetransitionofeachwaxisthemajorfirst-ordertransition,itsrelativewidthshouldcorrelatewiththerelativewidthofthewax’molecularweightdistribution.1.1Thistestmethodcoversthetransitiontemperaturesofpetroleumwaxes,includingmicrocrystallinewaxes,bydifferentialscanningcalorimetry(DSC).Thesetransitionsmayoccurasasolid-solidtransitionorasasolid-liquidtransition.1.2Thenormaloperatingtemperaturerangeextendsfrom15Cto150C(Note1).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E42
【国际标准分类号】:75_140
【页数】:4P.;A4
【正文语种】:
MIL-F-8975/1A, MILITARY SPECIFICATION: FASTENERS, BLIND, HIGH STRENGTH, INSTALLATION FORMED, CORROSION RESISTANT AND HEAT RESISTANT STEEL AND TITANIUM, DESIGN AND USAGE LIMITATIONS FOR (29 SEP 1982) [S/S BY NASM8975/1]., The complete requirements for acquiring the fastener described herein shall consist of this document and the latest issue of MIL-F-8975.
