【英文标准名称】:StandardSpecificationforSteel,SheetandStrip,HeavyThicknessCoils,HighStrength,Low-Alloy,Hot-Rolled,withImprovedFormability
【原文标准名称】:改进了可加工性的高强度低合金铌钢或钒钢或铌钒合金热轧钢薄板、带材和特厚卷材标准规范
【标准号】:ASTMA936/A936M-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【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】:薄钢板;合金钢薄板/带材;特厚卷材;高强度低合金钢;改进的可加工性;钢带材;高强度低合金钢薄板/带材
【英文主题词】:flatbars;hotrolled;flatsteels;improvedformability;steelstrip;alloysteelsheet/strip;heavythicknesscoils;high-strengthlow-alloysteel;steelsheet/strip-highstrength/low-alloy;qualityrequirem
【摘要】:
【中国标准分类号】:H46
【国际标准分类号】:77_140_50
【页数】:4P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforDeterminingDegradationEndPointinDegradablePolyethyleneandPolypropyleneUsingaTensileTest
【原文标准名称】:用拉伸试验对聚乙烯和聚丙烯老化过程的最终老化点的测定
【标准号】:ASTMD3826-1998(2002)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D20.96
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:试验;塑料
【英文主题词】:brittlepoint;degradableplastics;plastics;polyethylene/polypropylenefilms/sheeting;tensileelongation;
【摘要】:Thetensileelongationpropertydeterminedbythispracticeisofvalueforthecharacterizationofdegradablematerials.Thetensileelongationpropertymayvarywithspecimenthickness,methodofpreparation,speedoftesting,typeofgripsused,andmannerofmeasuringtestextension.Consequently,whereprecisecomparativeresultsaredesired,thesefactorsmustbecarefullycontrolled.Thetensileelongationpropertymaybeutilizedtoprovidedataforresearchanddevelopmentandengineeringdesignaswellasqualitycontrolspecifications.However,datafromsuchtestscannotbeconsideredsignificantforapplicationsdifferingwidelyfromtheload-timescaleofthetestemployed.Materialsthatfailbytearinggiveanomalousdatathatcannotbecomparedwiththosefromnormalfailure.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationsofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparametersoracombinationthereof,coveredinthematerialspecificationsshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thispracticecoversthedeterminationofadegradation-endpoint(abrittlepoint)fordegradablepolyethylene/polypropylenefilmsandsheetinglessthan1.0mm(0.04in.)thick.Thispracticeisnotintendedfordeterminationoftherateofdegreeofdegradationofapolyethylene/polypropylenefilmorsheet,butrather,toassesswheninthecourseofitsdegradationundersomecondition,abrittlepointisreached.Ifonewishestomonitortensileelongationduringthedegradationprocess(suchaswhenthetensileelongationissignificantlygreaterthan5%),TestMethodD882isrecommended.Thispracticeshouldnotbeconsideredtheonlywayofdeterminingadegradation-endpoint.1.2Tensilepropertiesofplastics1.0mm(0.04in.)orgreaterinthicknessshallbedeterminedinaccordancewithTestMethodD638.1.3Useastaticweighing-constantrateofgripseparationtest.Thisprocedureemploysaconstantrateofseparationofthegripsholdingthesampleandastaticloadcell.Note18212;Thisprocedureisbasedontheuseofgripseparationasameasureofextension;however,thedesirabilityofusingextensionindicatorsaccurateto177;1.0%orbetterasspecifiedinTestMethodD638isrecognized,andaprovisionfortheuseofsuchinstrumentationisincorporatedintheprocedure.1.4Thisprocedurehasbeensuccessfulfordeterminingthedegradationendpointofethylene-carbon-monoxidecopolymersandhasscreenedsuccessfullytwootheradditive-typepolyethylenesinaroundrobintest.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.7ThereisnoequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:4P.;A4
【正文语种】:
基本信息
| 标准名称： | 69-Ⅲ型轻潜水装具 |
| 中标分类： |
公路、水路运输 >>
救助、打捞与潜水 >>
潜水装备 |
| 替代情况： | 替代JT/T 207-1995 |
| 发布部门： | 交通运输部 |
| 发布日期： | 2008-12-19 |
| 实施日期： | 2009-03-01 |
| 首发日期： | |
| 作废日期： | |
| 主管部门： | 交通运输部 |
| 出版社： | 人民交通出版社 |
| 出版日期： | 2009-03-01 |
| 书号： | 15114.1293 |
适用范围
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前言
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引用标准
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所属分类： 公路 水路运输 救助 打捞与潜水 潜水装备