ISO 21028-2:2018
Cryogenic vessels — Toughness requirements for materials at cryogenic temperature — Part 2: Temperatures between -80 degrees C and -20 degrees C
ISO 21028-2:2018 specifies the toughness requirements of metallic materials for use at temperatures between −20 °C and −80 °C to ensure their suitability for cryogenic vessels. This document is applicable to fine-grain and low-alloyed steels with specified yield strength ≤460 N/mm2, aluminium and aluminium alloys, copper and copper alloys and austenitic stainless steels.
NOTE For steel materials listed in EN 13445‑2 or EN 13480‑2 or for steel materials and weldings complying with the same fundamental safety requirements, the requirements for prevention of brittle fracture at low temperatures according to EN 13445‑2:2014, Annex B, method 2, or EN 13480‑2:2012, Annex B, method 2 can be applied.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Requirements for steels with specified yield strength ≤460 N/mm2
5.1 General
5.2 Temperature adjustments
5.3 Procedure for base material <10 mm thick
6 General test requirements
6.1 General
6.2 Sub-sized specimens
6.3 Sub-sized specimens for components from which it is impossible to extract specimens of section size equal to reference thickness
7 Welds
8 Requirements for aluminium and aluminium alloys, copper and copper alloys and austenitic stainless steels
Annex A (informative) Case proposal — Technical justification for temperature adjustment term
Annex B (informative) Example of calculation of the lowest temperature authorized during operation
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Requirements for steels with specified yield strength ≤460 N/mm2
5.1 General
5.2 Temperature adjustments
5.3 Procedure for base material <10 mm thick
6 General test requirements
6.1 General
6.2 Sub-sized specimens
6.3 Sub-sized specimens for components from which it is impossible to extract specimens of section size equal to reference thickness
7 Welds
8 Requirements for aluminium and aluminium alloys, copper and copper alloys and austenitic stainless steels
Annex A (informative) Case proposal — Technical justification for temperature adjustment term
Annex B (informative) Example of calculation of the lowest temperature authorized during operation
Bibliography