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22、SA America Inc., operating as “CSA Group”American National Standards Institute, Inc.Approved on January 07, 2014 by ANSITest methods for evaluating material compatibility in compressed hydrogen applications - MetalsANSI/CSA CHMC 1-2014ANSI/CSA CHMC 1-2014Test methods for evaluating material compatib
23、ility in compressed hydrogen applications - MetalsJanuary 2014 2014 CSA Group1ContentsJoint Automotive Technical Committee 3Technical Committee on Test Method for Evaluating Material Compatibility for Compressed Hydrogen Applications 5Preface 60 Introduction 81 Scope 82 Reference publications 93 Def
24、initions 94 General requirements 104.1 Hydrogen gas purity 104.1.1 Significance 104.1.2 Source gas 104.1.3 Purging 114.1.4 Test gas purity and sampling 124.2 Measurement and instrumentation 124.2.1 Internal transducers 134.2.2 External transducers 134.3 Test temperature 134.3.1 Temperature selection
25、 134.3.2 Test Temperatures for select alloy classes 144.3.3 Experimental determination of temperature of maximum hydrogen embrittlement 144.4 H2test pressure 154.4.1 Test pressure selection 155 Test methods 165.1 Apparatus 165.2 Applicability of results 165.3 Specimen orientation 165.4 Slow strain r
26、ate tensile testing 165.4.1 Apparatus 165.4.2 Test environment 165.4.3 Test procedure 175.4.4 Reporting 175.5 Hydrogen assisted cracking threshold stress intensity factor, KIH, or JIH175.5.1 Apparatus 175.5.2 Test environment 185.5.3 Specimen preparation 185.5.4 Test procedures 185.5.5 Reporting 185
27、.6 Fatigue Crack Growth Rate (FCGR) 18ANSI/CSA CHMC 1-2014Test methods for evaluating material compatibility in compressed hydrogen applications - MetalsJanuary 2014 2014 CSA Group25.6.1 Apparatus 195.6.2 Test environment 195.6.3 Specimen preparation 195.6.4 Procedure 195.6.5 Reporting 205.7 Fatigue
28、 life tests 205.7.1 Apparatus 205.7.2 Test environment 205.7.3 Specimen preparation 205.7.4 Test procedures 205.7.5 Reporting 216 Material qualification 226.1 Overview of qualification process 226.1.1 Qualification procedures 226.1.2 Applicability of test results 226.2 Screening test 246.2.1 Slow st
29、rain rate tensile tests 246.2.2 Compatibility criteria for aluminum and austenitic stainless steel 246.2.3 Compatibility criteria for all alloys 246.3 Determination of safety factor multiplier 256.3.1 Notched tensile fatigue testing 256.3.2 Statistical analysis of fatigue results 256.4 Design qualif
30、ication by testing 266.4.1 Design rules 266.4.2 Requirements for stress - or strain - based fatigue testing 276.4.3 Requirements for fracture mechanics based fatigue testing 276.5 Qualification of materials specification 296.5.1 Requirements for qualification of a materials specification 29Annex A (
31、informative) Additional information on hydrogen gas purity requirements 31Annex B (informative) Additional considerations regarding transducers exposed to gaseous hydrogen 32Annex C (informative) Recommendations if using external displacement measurement 33Annex D (informative) Test temperature 34An
32、nex E (informative) Recommendations on testing hydrogen-precharged specimens 35Annex F (normative) Statistical analysis of fatigue data 38Annex G (informative) Recommended procedures for qualification of welds 40Annex H (informative) Bibliography 41ANSI/CSA CHMC 1-2014Test methods for evaluating mat
33、erial compatibility in compressed hydrogen applications - MetalsJanuary 2014 2014 CSA Group3Joint Automotive Technical CommitteeL. Gambone Powertech Labs Inc, Surrey, British Columbia, CanadaCategory: User InterestChairJ. Birdsall Toyota Motor Engineering c) wording of the proposed change; andd) rat
34、ionale for the change.6) To submit a request for interpretation of this Standard, please send the following information to inquiriescsagroup.organd include “Request for interpretation” in the subject line:a) define the problem, making reference to the specific clause, and, where appropriate, include
35、 an illustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed in accordance with the CSA Directives
36、and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.ANSI/CSA CHMC 1-2014Test methods for evaluating material compatibility in compressed hydrogen applications - MetalsJanuary 2014 2014 CSA Group 7History of the development
37、 of ANSI/CSA CHMC 1Note: This history is informative and is not part of the standard.In September 2002, CSA met with the U.S. Department of Energy, Renewable Fuels Group in Washington, D.C. to discuss standards development opportunities in the hydrogen technology area. During this meeting, DOE reque
38、sted that CSA provide a proposal relating to the development of hydrogen technology standards and codes in the United States.Industry recognized that an important consideration in the successful commercialization of hydrogen gas as a vehicle fuel was the issue of codes and standards, pertaining to b
39、oth fueling stations and vehicle fuel system components. CSA undertook the goal of establishing a program for the development of an organized family of coordinated standards that addresses hydrogen gas vehicles and fueling stations.Industry and CSA recognized there was no comprehensive standard that
40、 provided methods for evaluating suitability of materials for use in hydrogen environments.The development of such a standard was necessary based on industry needs and feedback:a) There were no comprehensive standard available for material suitability in hydrogen applications.b) Automotive OEMs driv
41、ing the application of hydrogen as a fuel for vehicles expressed concern over solutions in demonstration projects in the field.The focus of the Test Method for Evaluating Material Compatibility in Compressed Hydrogen Applications standard established uniform test methods for evaluating material comp
42、atibility with compressed hydrogen applications. The results of these tests are intended to provide a basic comparison of materials performance in applications utilizing compressed hydrogen. This standard is not intended to replace the targeted testing which may be necessary to qualify the design of
43、 a component manufactured for use in hydrogen applications.This standard applies to metallic materials only.CSA has positioned itself as a leader in the fuel cell, hydrogen and natural gas sectors as a Standards Developing Organization (SDO). CSA is aggressively updating and developing national stan
44、dards, and is playing a major role in the promulgation of US technologies nationally. As US TAG Administrator to IEC TC 105 for Fuel Cell Technologies and as US TAG members of ISO TC 197 and ISO TC 22 / SC 25, CSA is facilitating US technology internationally. CSA organized committees to address tec
45、hnical issues in the development of standards which would affect future expansion of the hydrogen industry.The ANSI/CSA CHMC 1 Test Method for Evaluating Material Compatibility in Compressed Hydrogen Applications standard was processed as an American National Standard in accordance with procedures o
46、f the American National Standards Institute (ANSI).This is the first edition of the ANSI/CHMC 1 Test Methods for Evaluating Material Compatibility in Compressed Hydrogen Applications - Metals, was approved by CSA Technical Committee on Automotive Alternative Energy on October 28, 2013, and the Ameri
47、can National Standards Institute, Inc. on January 07, 2014.Previous editions of this standard are as follows: CSA CHMC-1-2012ANSI/CSA CHMC 1-2014Test methods for evaluating material compatibility in compressed hydrogen applications - MetalsJanuary 2014 2014 CSA Group8ANSI/CSA CHMC 1-2014Test methods
48、 for evaluating material compatibility in compressed hydrogen applications - Metals0 IntroductionPressurized hydrogen gas environments may alter the mechanical properties of virtually all common structural metal alloys. The manifestations of the effects of hydrogen environment on mechanical properti
49、es are qualitatively similar for all relevant structural metals and alloys hydrogen reduces the resistance to crack initiation and crack growth, and reduces ductility. Quantitatively, the magnitude of this reduction is strongly dependent on a large number of variables related to the material, the environment and the mechanical loading conditions.The test methods described in this standard are intended to provide an assessment of the influence of gaseous hydrogen on a given metallic alloys tensile ductility and resistance to sub-critical crack
