欢迎来到标准图书馆! | 帮助中心 Day Day UP!
标准图书馆
首页 标准图书馆 > 资源分类 > PDF文档下载

ASTM D6457-08 (Reapproved 2013)

  • 资源大小:126.83KB        全文页数:6页
  • 资源格式: PDF        下载权限:游客/注册会员/VIP会员    下载费用:30Gold 【人民币30元】
游客快捷下载 游客一键下载
会员登录下载
下载资源需要30Gold 【人民币30元】Paypal charge shall be login

邮箱/手机号:
您支付成功后,系统会自动为您创建此邮箱/手机号的账号,密码跟您输入的邮箱/手机号一致,以方便您下次登录下载和查看订单。注:支付完成后需要自己下载文件,并不会自动发送文件哦!

支付方式: 微信支付    支付宝   
验证码:   换一换

友情提示
2、本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

ASTM D6457-08 (Reapproved 2013)

Designation D6457 − 08 Reapproved 2013Standard Specification forExtruded and Compression Molded Rod and Heavy-WalledTubing Made from Polytetrafluoroethylene PTFE1This standard is issued under the fixed designation D6457; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification is intended to be a means of callingout plastic product used in the fabrication of end items or parts.1.2 This specification covers requirements and test methodsfor the material, dimensions, and workmanship, and the prop-erties of extruded- and compression-molded rod, and heavy-walled tube manufactured from granular unfilled PTFE resin inaccordance with Specification D4894.1.3 This specification covers rod and heavy-walled tubingmade wholly from polytetrafluoroethylene and produced inaccordance with good commercial practice.1.4 The properties included in this specification are thoserequired for the compositions covered. Requirements neces-sary to identify particular characteristics important to special-ized applications are described by using the classificationsystem given in Section 4.1.5 This specification allows for the use of recycled plasticsas defined in Guide D7209.1.6 The values stated in inch-pound units are to be regardedas the standard in all property and dimensional tables.1.7 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1Although this specification and ISO 13000-1 and ISO13000-2 differ in approach or detail, data obtained using either aretechnically equivalent.2. Referenced Documents2.1 ASTM Standards2D374 Test Methods for Thickness of Solid Electrical Insu-lation Withdrawn 20133D638 Test Method for Tensile Properties of PlasticsD792 Test Methods for Density and Specific Gravity Rela-tive Density of Plastics by DisplacementD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1708 Test Method for Tensile Properties of Plastics by Useof Microtensile SpecimensD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsD4591 Test Method for Determining Temperatures andHeats of Transitions of Fluoropolymers by DifferentialScanning CalorimetryD4894 Specification for Polytetrafluoroethylene PTFEGranular Molding and Ram Extrusion MaterialsD7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled Polymeric Materials and ProductsE94 Guide for Radiographic ExaminationIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units SI The Modern Metric System2.2 ISO Standard4ISO 13000-1 PlasticsPolytetrafluoroethylene PTFESemi-Finished ProductsPart I Requirements and Des-ignationISO 13000-2 PlasticsPolytetrafluoroethylene PTFESemi-Finished ProductsPart II Preparation of TestSpecimens and Determination of Properties3. Terminology3.1 Definitions3.1.1 Terms are defined in accordance with TerminologyD883 unless otherwise specified.3.1.2 heavy-walled tubing, nan annular shape with aminimum wall thickness of1⁄16 in.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials D20.15.12 on Fluoropolymers.Current edition approved May 1, 2013. Published May 2013. Originallyapproved in 1999. Last previous edition approved in 2008 as D6457 - 08. DOI10.1520/D6457-08R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute ANSI, 25 W. 43rd St.,4th Floor, New York, NY 10036, http//www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.3 lot, none production run or a uniform blend of twoor more production runs.3.1.4 rod, na solid cylindrical shape.3.2 Abbreviations3.2.1 Abbreviations are in accordance with TerminologyD1600 unless otherwise indicated.3.2.2 PTFEpolytetrafluoroethylene4. Classification4.1 Product shape and size is defined in the applicablepurchase order.4.2 This specification covers product-extruded andcompression-molded as listed in Tables 1 and 2.4.2.1 The type of PTFE shape product is categorized bytype, class, and grade as defined in Tables 1 and 2.4.2.2 Each type of PTFE shape is categorized into one of thefollowing grades4.2.2.1 Grade 1Virgin-extruded or compression-moldedproduct made using only 100 virgin PTFE resin.4.2.2.2 Grade 2Recycled-extruded or compression-molded product made using any amount up to 100 recycledPTFE plastic.4.2.3 Products can be further differentiated by propertyrequirements, as defined for three classes of PTFE products inTables 1 and 2.4.2.3.1 Class 1A type of rod or heavy-walled tubinghaving maximum physical and electrical properties to meetrigid requirements.4.2.3.2 Class 2 General PurposeA type of rod or heavy-walled tubing having properties required of general electrical,mechanical, and chemical applications.4.2.3.3 Class 3A type of rod or heavy-walled tubing fornoncritical chemical, electrical, and mechanical applications.4.3 The type, class, and grade is further differentiated basedon dimensional stability elevated temperature excursion testand internal defect requirements.4.4 Classification D4000 also is used to describe extruded orcompression molded products not included in Tables 1 and 2by means of a cell callout that includes the applicable table ofsuffixes using type and specific properties.4.5 To facilitate the incorporation of future or specialmaterials not covered by Tables 1 and 2, the “as specified”category 00 for type, class, and grade is shown in the tablewith the basic properties to be obtained from ClassificationD4000 as they apply.4.6 Callout DesignationA line callout system is used tospecify materials in this specification. The system uses pre-defined cells to refer to specific aspects of this specificationillustrated as followsTABLE 1 Mechanical and Electrical Requirements of PTFE RodType Description Grade Description Class DescriptionSize Range[in.]ASpecificGravityminBUltimateTensileStrength,psi minCTensileElongation, minDDielectricStrength,volts/milminDDimensionalStabilityEInternalExaminationF01 Unfilled PTFE 1 virgin 1 premium less than1⁄2 2.14 2000 150 700 A or B C or D1⁄2 to 11⁄2 2.15 2100 175 750 A or B C or Dover 11⁄2 2.15 2200 200 800 A C or D2 general purpose less than1⁄2 2.12 1700 100 600 A or B C or D1⁄2 to 11⁄2 2.13 1800 125 650 A or B C or Dless than1⁄2 2.14 1900 150 700 A C or D3 noncritical less than1⁄2 2.12 1400 50 250 A or B C or D1⁄2 to 11⁄2 2.13 1500 75 250 A or B C or Dover 11⁄2 2.14 1600 75 250 A C or D0 as specified - - - - - A or B C or D01 Unfilled PTFE 2 recycled 1 premium less than1⁄2 TBD TBD TBD TBD A or B C or D1⁄2 to 11⁄2 TBD TBD TBD TBD A or B C or Dover 11⁄2 TBD TBD TBD TBD A C or D2 general purpose less than1⁄2 TBD TBD TBD TBD A or B C or D1⁄2 to 11⁄2 TBD TBD TBD TBD A or B C or Dless than1⁄2 TBD TBD TBD TBD A C or D3 noncritical less than1⁄2 TBD TBD TBD TBD A or B C or D1⁄2 to 11⁄2 TBD TBD TBD TBD A or B C or Dover 11⁄2 2.14 1600 75 250 A D0 other none - - - - A or B C or D00 Other PTFE 1 virgin 0 as specified none - - - - A or B C or D2 recycled 0 as specified none - - - - A or B C or D0 as specified 0 as specified none - - - - A or B C or DAOne inch equals 25.4 mm.BSee 12.2.CSee 12.3.DSee 12.4.ESee 12.5. “A” indicates that the product has no dimensional stability requirements. “B” indicates that product must comply with dimensional stability requirements in 7.3.This requirement applies only to rod that is under 25.4 mm [1 in.] in diameter.FSee 12.6. “C” indicates that the product has no internal inspection requirements. “D” indicates that product must comply with the inspection requirements given in 8.3.D6457 − 08 201324.6.1 Examples4.6.1.1 Example 1Product made from unfilled PTFE,virgin, premium no dimensional stability requirements orinternal examination.Cell Callout 10111AC01 product made from PTFE in accordance with Table 1.1 unfilled PTFE type.1 gradevirgin.1 premium class product.A no dimensional stability required.C no internal exam required.4.6.1.2 Example 2Products made from unfilled PTFE,virgin, general purpose properties, 1 in. diameter rod, maxi-mum tolerance of 0.020 in. inspected for internal defect.Cell Callout 10112BD1 product made from PTFE in accordance with Table 1.01 unfilled type.1 virgin grade product.2 general purpose class requirements.B dimensional tolerances in accordance with Table 3.D internal inspection required.4.6.2 These two examples illustrate how a one-line, alpha-numeric sequence identifies the product composition, commer-cial parameters and physical characteristics of extruded orcompression molded product. A space must be used as aseparator between the specification number and the typedesignation. No separators are needed between type, class, andgrade. When special notes are to be included, such informationshould be preceded by a comma. Special tolerances must benoted at the time of order and are inserted after the grade inparenthesis and preceded by a comma.5. Ordering Information5.1 All shapes covered by this specification shall be orderedusing the proper callout designation see 4.6.6. Physical Property Requirements6.1 The physical property values listed within this specifi-cation’s tables are to be considered minimum specificationvalues. Any requirement for specific test data for a givenproduction lot must be specified at the time of order. Physicalproperties for products not yet included in Table 1 are specifiedusing Classification D4000 for xtruded or compression-moldedproducts.6.2 Melting PointThe melting point of all types of rod andheavy-walled tubing shall be 327 6 10C when tested inaccordance with 12.7.7. Dimensions, Mass, and Permissible Variations7.1 The dimensions and tolerances of heavy-walled tubingshall be in accordance with Table 3. Measurements shall bemade in accordance with Method A of Test Methods D374.7.2 For rod and heavy-walled tubing, center-less-grind theoutside diameter to meet the tolerance given in Table 3.7.2.1 EccentricityThe eccentricity of the heavy-walledtubing, when measured as one-half of the difference betweenthe maximum and minimum wall thickness at either end of thetube, shall not exceed 10 of the nominal wall thickness. TheTABLE 2 Mechanical and Electrical Requirements of PTFE Heavy-Walled TubingType Description Grade Description Class DescriptionSpecificGravityminAUltimateTensileStrength, psiminBTensileElongation, minBDielectricStrength,volts/milminCDimensionalStabilityDInternalExaminationE01 Unfilled PTFE 1 virgin 1 premium 2.15 2000 150 750 A or B C or D2 general purpose 2.15 1800 130 650 A or B C or D3 noncritical 2.14 1600 100 325 A or B C or D0 as specified ----2 recycled 1 premium 2.14 1500 140 700 A or B C or D2 general purpose 2.14 1400 120 600 A or B C or D3 noncritical 2.13 1300 80 250 A or B C or D0 as specified ----0 as specified 0 as specified AorBCorD00 As specified 1 virgin 0 as specified ----2 recycled 0 as specified AorBCorD0 as specified 0 as specified ----ASee 12.2.BSee 12.3.CSee 12.4.DSee 12.5. “A” indicates that the product has no dimensional stability requirements. “B” indicates that product must comply with dimensional stability requirements in 7.3.ESee 12.6.“ C” indicates that the product has no internal inspection requirements.“ D” indicates that product must comply with the inspection requirements given in 8.3.TABLE 3 Diameter and Tolerance for PTFE Rod and Heavy-Walled TubingNominal Diameter orOutside Diameter, in.A,BTolerance, in.A,C1⁄16 0.0051⁄8 0.0073⁄16 0.0091⁄4 0.0123⁄8 0.0121⁄2 0.0145⁄8 0.0163⁄4 0.0171 0.02011⁄4 0.02511⁄2 0.03013⁄4 0.0352 0.03521⁄4 0.04021⁄2 0.0453 0.045AOne inch equals 25.4 mm.BIntermediate diameters shall conform to the tolerance of the next larger diameterin this table.CThe tolerance is plus for outside diameters and minus for inside diameters.D6457 − 08 20133nominal wall thickness is one-half the difference between thenominal outside diameter and the nominal inside diameter.7.3 As indicated in Table 1, when tested in accordance with12.5, products must have maximum change in a samplediameter of 0.5 or a maximum change in a sample diameterof 3.0 , or both.7.4 Products shall be produced within commercial toler-ances and with the lowest stress levels for machined parts asdelineated in Table 3.7.5 Tubular bar dimensions shall be supplied in the unfin-ished condition, unless otherwise specified at time of order,sufficient to finish to the nominal dimension ordered.8. Workmanship, Finish, and Appearance8.1 ColorClass 1 shall be white to translucent withoccasional spots. Class 2 typically are white to light gray orlight brown. For Class 3, occasional small gray, brown, orblack spots shall not be considered cause for rejection.8.2 FinishThe rod or heavy-walled tubing shall be freefrom surface blisters, cracks, wrinkles, and other surfacedefects that might impair it for general use.8.3 Internal DefectsClasses C and D either shall be free ofall macroscopic voids, cracks, and foreign inclusions, or thelocation of such defects shall be marked or identified clearly.The examination for internal defects shall be made in accor-dance with Guide E94.9. Sampling9.1 Sampling shall be statistically adequate to satisfy therequirements of this specification.10. Number of Tests10.1 Routine lot inspection shall consist of all the criteriaspecified in the applicable product tables.10.2 The criteria listed in these product tables and defini-tions are sufficient to establish conformity of the sheet, plate,rod, or tubular bars to this specification. When the number oftest specimens is not stated in the test method, make a singledetermination. If more than single determinations and separateportions of the same sample are made, the results shall beaveraged. The final result shall conform to the requirementsprescribed in this specification.11. Test Conditions11.1 Conditioning of SpecimensThe specification valuesand dimensions are based on conditioning techniques outlinedin Procedure A of Practice D618.11.2 Standard TemperatureThe tests shall be conducted atthe

注意事项

本文(ASTM D6457-08 (Reapproved 2013))为本站会员(Es前缘)主动上传,标准图书馆仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知标准图书馆(发送邮件至admin@stdlibrary.com或直接QQ联系客服),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

@copyright 2017-Stdlibrary All Rights Reserved.


收起
展开