1、Designation: C565 93 (Reapproved 2010)1C565 15 An American National StandardStandard Test Methods forTension Testing of Carbon and Graphite MechanicalMaterials1This standard is issued under the fixed designation C565; the number immediately following the designation indicates the year oforiginal ado
2、ption 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 NOTEUpdated units information in 1.2 and 5.2 editorially in May 2010.1. Scope Sco
3、pe*1.1 These test methods cover the apparatus, specimen, and procedures for the tension testing of carbon and graphite mechanicalmaterials with a grain size smaller than 0.79 mm.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this stand
4、ard.1.2.1 ExceptionAll of the figures are dimensioned in inches in accordance with the original standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and
5、 health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C709 Terminology Relating to Manufactured Carbon and GraphiteC749 Test Method for Tensile Stress-Strain of Carbon and GraphiteE4 Practices for Force Verification of Test
6、ing MachinesE6 Terminology Relating to Methods of Mechanical Testing3. Terminology3.1 DefinitionsFor definitions of terms relating to manufactured carbon and graphite, see Terminology C709. The definitionsof terms relating to tension testing in Terminology E6 shall be considered as applying to the t
7、erms used in these test methods.3.1 Definitions:3.1.1 The definitions of terms relating to tension testing in Terminology E6 shall be considered as applying to the terms usedin these test methods.3.1.2 tensile strength, nproperty of solid material that indicates its ability to withstand a uniaxial t
8、ensile load, converted tounit stress based on the original cross-section area of the tensile test specimen.3.1.3 ultimate tensile strength, nthe maximum tensile stress applied in stretching a specimen to rupture.4. Significance and Use4.1 These test methods may be used for quality control testing of
9、 established grades of carbon and graphite materials, in thedevelopment of new grades, and for other purposes where relative strength levels are the primary quantities of interest. This testmethod may be applicable only if the ratio of specimen diameter to grain size, or flaw size, is greater than 5
10、.4.2 These test methods do not substitute for that described in Test Method C749, but are useful where less sophisticated dataand less expensive techniques are sufficient.1 These test methods are under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricant
11、s and are the direct responsibilityof Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.Current edition approved May 1, 2010Dec. 1, 2015. Published November 2010 January 2016. Originally approved in 1965. Last previous edition approved in 20052010as C56593(2005).C565 93(2010)1. DOI: 1
12、0.1520/C0565-93R10E01.10.1520/C0565-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not a
13、n ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate.
14、In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*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 States14.3 C
15、arbon and graphite materials exhibit significant physical property differences within parent materials. Exact samplingpatterns and grain orientations must be specified in order to make meaningful tensile strength comparisons.5. Apparatus5.1 Testing MachineThe machine used for tension testing shall c
16、onform to the requirements of Practices E4. The testingmachine shall have a capacity that the breaking load of the test specimen falls between 1010 % and 90 % of the scale capacity.5.2 Gripping DevicesGripping devices that conform to the principles of those illustrated in Fig. 1 shall be used (dimen
17、sionsthat reflect the use of SI units are permissible). These gripping devices shall be attached to the heads of the testing machine throughchain connectors. Fig. 2 shows the gripping device connected to the heads. Extreme care shall be taken that the axis of the testspecimen is located on the cente
18、r line of the head of the testing machine.6. Test Specimens6.1 Test specimens shall be produced to the configuration shown in Fig. 3.6.2 Improperly prepared test specimens often cause unsatisfactory test results. It is important, therefore, that care be exercisedin the preparation of specimens, part
19、icularly in the machining and polishing.6.3 The specimen shall be hand polished with No. 000 dry paper until no circular grooves are visible to the naked eye.6.4 The acceptable fracture zone of the specimen shall be 19 mm long with the center of the zone at the point of minimumdiameter. Marks indica
20、ting fracture zone limits may be applied with ink or layout dope, but no scratching, punching, or notchingof the specimen is permissible.6.5 To determine the cross-sectional area, the diameter of the specimen at the narrowest point shall be used. The dimension shallbe recorded to the nearest 0.02 mm
21、.NOTE 1All dimensions are in inches.NOTE 2Material is stainless steel.NOTE 3Surface finish of working surfaces, 11 microinches AA or better.NOTE 4Break all sharp corners.NOTE 5Top and bottom collars to be split into two 180 sections. Max cutwidth not to exceed 116 in.FIG. 1 Gripping DevicesC565 1527
22、. Speed of Testing7.1 Speed of testing may be defined in terms of free-running of the crosshead speed or in terms of rate of stressing the specimen.Both methods are permissible.7.2 When free-running crosshead speed is used, the speed shall be 0.500.50 % 6 10 % mm/min.7.3 When rate of stressing the s
23、pecimen is used, an applied force of 890 N/min 6 220 N/min shall be used.8. Tensile Strength8.1 Calculate the tensile strength by dividing the maximum load carried by the specimen during a tension test by thecross-sectional area of the specimen as defined in 6.5. The weight of the bottom grip assemb
24、ly must be accounted for in the tensilestrength calculation.8.2 If any part of the fracture takes place outside the acceptable fracture zone as defined in 6.4, the test shall be discarded butreported.FIG. 2 Test SetupNOTE 1All dimensions are in inches.NOTE 2Specimen shall be hand-polished on 9.141 t
25、o 9.172 radius with No. 000 dry paper until no circular grooves are visible to the naked eye.FIG. 3 Test SpecimenC565 1539. Report9.1 Report the following:9.1.1 Identification; manufacturer, grade number, lot number, and original material size;9.1.2 Average ultimate tensile strength (MPa);9.1.3 Meth
26、od of loading (see Section 7);9.1.4 Number of samples tested;9.1.5 Number of samples reported;9.1.6 Standard deviation (MPa); and9.1.7 Specimen orientation.10. Precision and Bias10.1 These test methods are intended to be less sophisticated than the method described in Test Method C749. For this reas
27、onan interlaboratory test program was not performed, but rather a direct comparison of the two tensile-test techniques was made. Twographite grades of low variability were tested by two different laboratories, one with extensive experience with Test Method C749,the other in the technique of this sta
28、ndard.10.2 The details of the experiments, the data base, and the statistical analyses may be obtained from ASTM.310.3 PrecisionApproximately 20 specimens of the two materials were supplied for testing under these test methods and tenspecimens for testing under Test Method C749. The resulting data w
29、ere examined for outliers by the Dixon Test, Grubbs T-Test,and skewness. The data sets were examined for normality by the Kolmogorov-Smirnov Test and for skewness and kurtosis. Nooutliers were found and only kurtosis for the two ten-specimen sets was found to be significant. This does not invalidate
30、 a test onmeans.10.3.1 By the approximate T-test, the means for the two techniques were found to be the same for any significance level equalto or less than 0.60 (two sided) corresponding to an observed difference in means of 0.9 %. An F-test on variance ratios betweenthe two tests showed a signific
31、ant difference at equal to or greater than 0.025 (one sided) for the observed variance ratio of aboutfive.10.3.2 It is concluded that these test methods will quite satisfactorily produce mean values of tensile strengths, but are notsatisfactory for producing good estimates for variance (standard dev
32、iation) unless proven by other measurement techniques for thematerial in question.10.4 BiasBias has not been determined.11. Keywords11.1 carbon; graphite; tensile strengthSUMMARY OF CHANGESSubcommittee D02.F0 has identified the location of selected changes to this standard since the last issue(C565
33、93 (2010)1) that may impact the use of this standard. (Approved Dec. 1, 2015.)(1) Revised Section 3.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that dete
34、rmination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or
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36、 your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (
37、single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:C05-1006.C565 154
