AS/NZS ISO 11114.4:2025
Transportable gas cylinders – Compatibility of cylinder and valve materials with gas contents – Part 4: Test methods for selecting steels resistant to hydrogen embrittlement
Standard specifies test methods and the evaluation of results from these tests in order to qualify steels suitable for use in the manufacture of gas cylinders (up to 3 000 l) for hydrogen and hydrogen-bearing embrittling gases.
This document only applies to seamless steel gas cylinders.
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AS/NZS ISO 11114.4:2025 Compatibility of cylinder and valve materials with gas contents Test methods for selecting steels resistant to hydrogen embrittlement
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 General requirements
5 Test methods
5.1 Disc test (method A)
5.1.1 Principle of test
5.1.2 Test conditions and procedure
5.1.3 Treatment and interpretation of test results
5.1.4 Failure in conducting test
5.1.5 Test report
5.2 Fracture mechanics test (method B)
5.2.1 Principle of the test method
5.2.2 Test procedure
5.2.3 Test results
5.3 Test method to determine the resistance to hydrogen assisted cracking of steel cylinders (method C)
5.3.1 General
5.3.2 Specimen configurations and numbers of tests
5.3.3 Fatigue precracking
5.3.4 Specimen testing procedure
5.3.5 Test procedure
5.3.6 Crack growth examination
5.3.7 Cylinder material qualification
5.3.8 Failure in conducting test
5.3.9 Test report
5.4 Tensile tests
Bibliography
Previous versions
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AS/NZS ISO 11114.4:2025 Compatibility of cylinder and valve materials with gas contents Test methods for selecting steels resistant to hydrogen embrittlement
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 General requirements
5 Test methods
5.1 Disc test (method A)
5.1.1 Principle of test
5.1.2 Test conditions and procedure
5.1.3 Treatment and interpretation of test results
5.1.4 Failure in conducting test
5.1.5 Test report
5.2 Fracture mechanics test (method B)
5.2.1 Principle of the test method
5.2.2 Test procedure
5.2.3 Test results
5.3 Test method to determine the resistance to hydrogen assisted cracking of steel cylinders (method C)
5.3.1 General
5.3.2 Specimen configurations and numbers of tests
5.3.3 Fatigue precracking
5.3.4 Specimen testing procedure
5.3.5 Test procedure
5.3.6 Crack growth examination
5.3.7 Cylinder material qualification
5.3.8 Failure in conducting test
5.3.9 Test report
5.4 Tensile tests
Bibliography
Previous versions
AS/NZS ISO 11114.4:2025
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.