ASTM_D_1349-14.pdf

D1349-14TABLE 1 Test Temperatures and Tolerances4.3.1 While a tolerance of+1C is not given in Table 1,itTestTolerance,is used in many specifications,procedures,practices,standardsTemperatures,plus or minus,or methods and it,as well as the tolerance for relative humidity.C(F)4C(F)-75(-103)2.03.6)is presented for guidance in those instances.-70(-94)2.0(3.6)-55(-672.0(3.6)4.4 The relative humidity ranges are not to be considered40(-40)2.0(3.6)exclusive.If agreed upon between customer and supplier,the-25(-132.0(3.6)relative humidity range may be selected from those given in-10142.0(3.6)0(32)4.1-4.3 notwithstanding the testing temperature.The relative2.0(3.6)23(73)52.0(3.6)humidity during testing shall be recorded and reported.35(95)2.0(3.6)40(1042.0(3.6)5.Conditioning of Materials for Testing50(1222.0(3.6)55(1312.03.6)5.1 The conditioning of materials for testing does not apply70(1582.0(3.6to preparation,mixing,processing,or vulcanizing temperatures85(185)2.0(3.6)or humidity conditions for rubber compounds as these are90(194)2.0(3.6)100(2122.0(3.6)typically well defined by individual specifications,procedures,105(2212.0(3.6)practices,standards or methods.1202482.0(3.6)125(2572.0(3.6)5.2 Physical and other properties of rubber are influenced by130(266)2.0(3.6)temperature and relative humidity in a manner that materially135(2752.0(3.6)affects test results.155(311)】2.03.6)160(320)20(3.6)5.3 Reliable comparisons between different materials and175(3472.0(3.6)between different laboratories are reliant upon standardized180(356)2.0(3.6200(392)3.0(5.4)temperature and relative humidity conditions to which speci-225(4373.0(5.4)mens of these materials are subjected prior to testing.250(482)3.0(5.4)275(5273.0(5.4)5.4 Conditioning of materials for testing is typically con-300(572)3.0(5.4)ducted:AThe test temperature is the(set point)temperature to which the testing5.4.1 For the purpose of bringing the material into equilib-environment is controlled(tolerance).The tolerance is the maximum allowablevariation of the instruments(chamber or room)indicated temperature during testrium with the standard laboratory atmosphere,andconditions.If the indicated temperature is beyond the tolerance,immediately5.4.2 To obtain reproducible results,regardless of a previ-implement procedures to correct the problem.ous history of exposure.Standard laboratory temperature.5.5 Any specification,procedure,practice,standard ormethod that specifies the conditioning of materials for testingshall take precedence over this practice.4.Relative Humidity for Testing5.6 Conditioning of Materials for Testing:4.1 When the tolerance for temperature is=3C,the toler-5.6.1 Materials shall be conditioned for no less than 12 h atance for relative humidity shall be no greater than 50+15the standard laboratory atmosphere(refer to 2.1.2).%RH(35 to 65%RH).5.6.2 If a greater or lesser conditioning time,temperature,or4.2 When the tolerance for temperature is+2C,the toler-relative humidity is mandated by a specification,procedure,ance for relative humidity shall be no greater than 50+10practice,standard,method or agreement between customer and%RH(40 to 60%RH)supplier it shall be recorded and reported.4.3 When the tolerance for temperature is 1C,the toler-6.Keywordsance for relative humidity shall be no greater than 50+5%RH6.1 conditions for testing of rubber;room temperature;(45to55%RH.standard laboratory atmosphere;standard test temperaturesASTM 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 determination 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 withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that 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(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:/