1、Designation: D1349 09D1349 14Standard Practice forRubberStandard TemperaturesConditions for Testing1This standard is issued under the fixed designation D1349; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 Reliable comparisons between different rubbe
3、r compounds and between different laboratories is an essential component ofeffective testing.1.2 It is necessary to standardize the temperature and humidity conditions to which materials are subjected prior to and duringtesting.1.3 Section 2 of this practice includes the definition of terms commonly
4、 used to describe the conditions of testing.1.4 ThisSection 3 of this practice covers a list of standard test temperatures for testing from which selection may be made forany specific test or test method. Any standard, method, practice, procedure, or specification that specifies test temperatures sh
5、alltake precedence over this practice.a specification, procedure, practice, standard or method.1.4.1 Any specification, procedure, practice, standard or method that specifies test temperatures shall take precedence over thispractice.1.4.2 The standard test temperatures for testing do not apply to pr
6、eparation, mixing, processing, or vulcanizing temperatures forrubber compounds.1.5 These temperaturesSection 4 do not apply to preparation, mixing, processing, or vulcanizing temperatures for rubbercompounds.of this practice covers a list of standard relative humidity conditions for testing from whi
7、ch selection may be made fora specification, procedure, practice, standard or method.1.5.1 Any specification, procedure, practice, standard or method that specifies relative humidity shall take precedence over thispractice.1.5.2 The standard relative humidity conditions for testing do not apply to p
8、reparation, mixing, processing, or vulcanizing ofrubber compounds, but may serve as a guide when the condition is not specified.1.6 Section 5 of this practice covers the standard conditioning of materials for testing.1.6.1 Any specification, procedure, practice, standard or method that specifies the
9、 conditioning of materials for testing shall takeprecedence over this practice.1.7 Section 6 of this practice includes the keywords associated with this document which may be used in standard documentor internet searches.1.8 The values stated in SI units are to be regarded as the standard. The value
10、s given in parentheses are for information only.1.9 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 health practices and determine the applicability of regu
11、latorylimitations prior to use.2. Terminology2.1 Definitions:2.1.1 room temperature, na temperature in the range from 20 to 30C (68 to 86F).2.1.2 standard laboratory atmosphere, nan atmosphere having a temperature of 23 6 2C (73.4 6 3.6F) and a relativehumidity of 50 6 10 %RH (40 to 60 %RH) shall be
12、 the standard laboratory atmosphere.1 This practice is under the jurisdiction of ASTM Committee D11 on Rubber and is the direct responsibility of Subcommittee D11.10 on Physical Testing.Current edition approved July 1, 2009July 1, 2014. Published July 2009August 2014. Originally approved in 1954. La
13、st previous edition approved in 20072009 asD1349 07.D1349 09. DOI: 10.1520/D1349-09.10.1520/D1349-14.This document is not an 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 technical
14、ly possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C
15、700, West Conshohocken, PA 19428-2959. United States12.1.3 standard laboratory temperature, na temperature of 23 6 2C (73.4 6 3.6F) shall be the standard laboratorytemperature.3. Test Temperatures for Testing2.1 The test temperatures are as follows:C F75 (103)70 (94)55 (67)40 (40)25 (13)10 (14)0 (32
16、)23 (73.4)35 (95)40 (104)50 (122)55 (131)70 (158)85 (185)90 (194)100 (212)105 (221)120 (248)125 (257)130 (266)135 (275)150 (302)155 (311)160 (320)175 (347)180 (356)200 (392)225 (437)250 (482)275 (527)300 (572)3.1 Tolerances for the test temperature, unless otherwise specified, shall be 62C (63.6F).
17、This tolerance is the maximumallowable variation in the temperature of the space enclosingWhen data are to be obtained for comparison purposes at a specifictemperature, select the test temperature and associated tolerance from Table 1the specimens being tested. The average temperatureof the space sh
18、all be as close as practicable to the specified temperature3.1.1 The temperatures in Table 1 are not to be considered exclusive. If agreed upon between customer and supplier,temperatures within the range shown in Table 1 may be employed, that is, where 195C was found to be a desired temperaturefor t
19、esting, it would be used with a 62.0C tolerance. The temperature shall be recorded and reported.3.1.2 Unless otherwise specified, tolerance for temperature shall be as given in Table 1.3.1.3 A tolerance of 61C (61.8F) or less, may be required by a specification, procedure, practice, standard or meth
20、od, or asagreed upon between customer and supplier and shall be recorded and reported. Refer to 4.3.1.2.3 Unless otherwise specified, testing of materials known to be sensitive to relative humidity shall be carried out at a relativehumidity of 50 6 5 %.4. Relative Humidity for Testing4.1 When the to
21、lerance for temperature is 63C, the tolerance for relative humidity shall be no greater than 50 6 15 %RH (35to 65 %RH).4.2 When the tolerance for temperature is 62C, the tolerance for relative humidity shall be no greater than 50 6 10 %RH (40to 60 %RH).4.3 When the tolerance for temperature is 61C,
22、the tolerance for relative humidity shall be no greater than 50 6 5 %RH (45to 55 %RH).4.3.1 While a tolerance of 61C is not given in Table 1, it is used in many specifications, procedures, practices, standards ormethods and it, as well as the tolerance for relative humidity, is presented for guidanc
23、e in those instances.4.4 The relative humidity ranges are not to be considered exclusive. If agreed upon between customer and supplier, the relativehumidity range may be selected from those given in 4.1 4.3 notwithstanding the testing temperature. The relative humidity duringtesting shall be recorde
24、d and reported.D1349 1425. Conditioning of Materials for Testing5.1 The conditioning of materials for testing does not apply to preparation, mixing, processing, or vulcanizing temperatures orhumidity conditions for rubber compounds as these are typically well defined by individual specifications, pr
25、ocedures, practices,standards or methods.5.2 Physical and other properties of rubber are influenced by temperature and relative humidity in a manner that materiallyaffects test results.5.3 Reliable comparisons between different materials and between different laboratories are reliant upon standardiz
26、edtemperature and relative humidity conditions to which specimens of these materials are subjected prior to testing.5.4 Conditioning of materials for testing is typically conducted:5.4.1 For the purpose of bringing the material into equilibrium with the standard laboratory atmosphere, and5.4.2 To ob
27、tain reproducible results, regardless of a previous history of exposure.5.5 Any specification, procedure, practice, standard or method that specifies the conditioning of materials for testing shall takeprecedence over this practice.5.6 Conditioning of Materials for Testing:5.6.1 Materials shall be c
28、onditioned for no less than 12 h at the standard laboratory atmosphere (refer to 2.1.2).5.6.2 If a greater or lesser conditioning time, temperature, or relative humidity is mandated by a specification, procedure,practice, standard, method or agreement between customer and supplier it shall be record
29、ed and reported.TABLE 1 Test Temperatures and TolerancesTestTemperatures,C (F)ATolerance,plus or minus,C (F)75 (103) 2.0 (3.6)70 (94) 2.0 (3.6)55 (67) 2.0 (3.6)40 (40) 2.0 (3.6)25 (13) 2.0 (3.6)10 (14) 2.0 (3.6)0 (32) 2.0 (3.6)23 (73)B 2.0 (3.6)35 (95) 2.0 (3.6)40 (104) 2.0 (3.6)50 (122) 2.0 (3.6)55
30、 (131) 2.0 (3.6)70 (158) 2.0 (3.6)85 (185) 2.0 (3.6)90 (194) 2.0 (3.6)100 (212) 2.0 (3.6)105 (221) 2.0 (3.6)120 (248) 2.0 (3.6)125 (257) 2.0 (3.6)130 (266) 2.0 (3.6)135 (275) 2.0 (3.6)155 (311) 2.0 (3.6)160 (320) 2.0 (3.6)175 (347) 2.0 (3.6)180 (356) 2.0 (3.6)200 (392) 3.0 (5.4)225 (437) 3.0 (5.4)25
31、0 (482) 3.0 (5.4)275 (527) 3.0 (5.4)300 (572) 3.0 (5.4)A The test temperature is the (set point) temperature to which the testingenvironment is controlled (tolerance). The tolerance is the maximum allowablevariation of the instruments (chamber or room) indicated temperature during testconditions. If
32、 the indicated temperature is beyond the tolerance, immediatelyimplement procedures to correct the problem.B Standard laboratory temperature.D1349 1436. Keywords6.1 conditions for testing of rubber; room temperature; standard laboratory atmosphere; standard test temperaturesASTM International takes
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