SAE AMSQQA250/5 Aluminum Alloy Alclad 2024, Plate and Sheet
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来源:标准资料网
Product Code:SAE AMSQQA250/5
Title:Aluminum Alloy Alclad 2024, Plate and Sheet
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers the specific requirements for 2024 aluminum alloy alclad plate and sheet; the general requirements are covered in AMS-QQ-A-250. The plate and sheet covered by this specification shall be an integral composite product consisting of a heat-treatable aluminum alloy 2024 core with thin layers of an aluminum alloy 1230 (99.30 percent minimum aluminum) anodic to the core and of approximately equal thickness, bonded to both surfaces.
【英文标准名称】:StandardTestMethodsforImpactResistanceofPlasticFilmbytheFree-FallingDartMethod
【原文标准名称】:用自由落镖法测试塑料薄膜抗冲击性的标准试验方法
【标准号】:ASTMD1709-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗冲击(强度);聚乙烯;塑料;试验
【英文主题词】:dropdart;impact;plasticfilm;
【摘要】:1.1Thesetestmethodscoverthedeterminationoftheenergythatcausesplasticfilmtofailunderspecifiedconditionsofimpactofafree-fallingdart.Thisenergyisexpressedintermsoftheweight(mass)ofthemissilefallingfromaspecifiedheightwhichwouldresultin50%failureofspecimenstested.1.2Twotestmethodsaredescribed:1.2.1TestMethodAemploysadartwitha38.100.13-mm[1.5000.005-in.]diameterhemisphericalheaddroppedfromaheightof0.660.01m[26.00.4in.].Thistestmethodmaybeusedforfilmswhoseimpactresistancesrequiremassesofabout50gorlesstoabout2kgtofracturethem.1.2.2TestMethodBemploysadartwitha50.800.13-mm[2.0000.005-in.]diameterhemisphericalheaddroppedfromaheightof1.500.03m[60.0+0.25,1.70in.].Itsrangeofapplicabilityisfromabout0.3kgtoabout2kg.1.3Twotestingtechniquesaredescribed:1.3.1Thestandardtechniqueisthestaircasemethod.Bythistechnique,auniformmissileweightincrementisemployedduringtestandthemissileweightisdecreasedorincreasedbytheuniformincrementaftertestofeachspecimen,dependingupontheresult(failornotfail)observedforthespecimen.1.3.2Thealternativetechniqueprovidesfortestingspecimensinsuccessivegroupsoften.Onemissileweightisemployedforeachgroupandmissileweightisvariedinuniformincrementsfromgrouptogroup.1.3.3Thestaircasetechniqueandthealternativetechniquegiveequivalentresultsbothastothevaluesofimpactfailureweightwhichareobtainedandastotheprecisionswithwhichtheyaredetermined.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesstatedinparenthesesareforinformationonly.Note18212;Testsonmaterialsthatdonotbreak,foranyreason,arenotconsideredtobevalid.Ithasbeennotedthatcertainmaterialsmaystretchsofarastobottomoutatthebaseofcertaintestinstrumentswithoutactuallyrupturing.SubcommitteeD20.19iscurrentlyconsideringmethodsfortestingthesematerials.AnyoneinterestedinparticipatinginaTaskGroupshouldcontacttheChairmanofSubcommitteeD20.19throughASTMInternationalHeadquarters.Note28212;ThistestmethodistechnicallyequivalenttoISO7765-1:1988,withtheexceptionofalargertoleranceonthedropheightinTestMethodB.Also,theISOmethoddoesnotallowthealternativetestingtechniquedescribedinSectionofthistestmethod.1.5Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_140_10
【页数】:9P.;A4
【正文语种】:
基本信息
| 标准名称： | 进口原油质量评价要求 |
| 发布部门： | 国家质量监督检验检疫总局 |
| 发布日期： | 2011-09-09 |
| 实施日期： | 2012-04-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2012-04-01 |
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所属分类： 综合 社会公共安全 社会公共安全综合 信息技术 办公机械设备 字符集和信息编码
