ISO 16540:2015 金属および合金の腐食—4点曲げ法を使用して応力腐食割れに対する金属の耐性を決定するための方法論 | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 156, Corrosion of metals and alloys.

This International Standard is based on a draft NACE International standard on Four-Point Bend Testing of Materials for Oil and Gas applications. NACE International grants the right to ISO to reproduce material extracted from that document.

Introduction

This International Standard has been prepared as a sub-set of ISO 7539 which consists of the following parts, under the general title Corrosion of metals and alloys — Stress corrosion testing:

• Part 1: General guidance on testing procedures
• Part 2: Preparation and use of bent-beam specimens
• Part 3: Preparation and use of U-bend specimens
• Part 4: Preparation and use of uniaxially loaded tension specimens
• Part 5: Preparation and use of C-ring specimens
• Part 6: Preparation and use of precracked specimens for tests under constant load or constant displacement
• Part 7: Method for slow strain rate testing
• Part 8: Preparation and use of specimens to evaluate weldments
• Part 9: Preparation and use of pre-cracked specimens for tests under rising load or rising displacement
• Part 10: Reverse U-bend method
• Part 11: Guidelines for testing the resistance of metals and alloys to hydrogen embrittlement and hydrogen-assisted cracking

1 Scope

This International Standard provides guidelines for the use of four-point bend testing to evaluate the resistance of metals including carbon steel, low alloy steels, and corrosion resistant alloys (CRAs) to stress corrosion cracking. The method gives guidance on testing of both parent plate and welds and includes procedures for metals that have no distinct yield point in their stress-strain behaviour as well as metals with a distinct yield point. The emphasis in this International Standard is on the generic methodology of the four-point bend test. Service application will be varied and the relevant industry standard is to be consulted where appropriate.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

Bibliography