Cryogenic vessels -- Toughness requirements for materials at cryogenic temperature

ISO 21028-1:2004 specifies the toughness requirements of metallic materials for use at temperatures below -80 °C to ensure their suitability for cryogenic vessels. It is not applicable to unalloyed steels and cast materials.

Récipients cryogéniques -- Exigences de ténacité pour les matériaux à température cryogénique

General Information

Status
Replaced
Publication Date
01-Jul-2004
Withdrawal Date
01-Jul-2004
Current Stage
6060 - International Standard published
Start Date
12-May-2004
Completion Date
02-Jul-2004
Ref Project

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ISO 21028-1:2004 - Cryogenic vessels -- Toughness requirements for materials at cryogenic temperature
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INTERNATIONAL ISO
STANDARD 21028-1
First edition
2004-07-01
Cryogenic vessels — Toughness
requirements for materials at cryogenic
temperature —
Part 1:
Temperatures below −−−− 80 °C
Récipients cryogéniques — Exigences de ténacité pour les matériaux à
température cryogénique —
Partie 1: Températures inférieures à − 80 °C
Reference number
ISO 21028-1:2004(E)
ISO 2004
---------------------- Page: 1 ----------------------
ISO 21028-1:2004(E)
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ii © ISO 2004 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 21028-1:2004(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 21028-1 was prepared by Technical Committee ISO/TC 220, Cryogenic vessels.

ISO 21028 consists of the following parts, under the general title Cryogenic vessels — Toughness

requirements for materials at cryogenic temperature:
 Part 1: Temperatures below − 80 °C
 Part 2: Temperatures between − 80 °C and − 20 °C
© ISO 2004 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 21028-1:2004(E)
Introduction

The use of materials at low temperatures entails special problems which have to be addressed. Consideration

has to be given, in particular, to changes in mechanical characteristics, expansion and contraction

phenomena and the thermal conduction of the various materials. Austenitic stainless steel can transform from

the austenitic to the martensitic phase when cooled down, leading to dimensional change that needs to be

considered during design.

However, the most important property to be considered is material toughness at low temperatures.

This part of ISO 21028 is based on the European Standard EN 1252-1:1998.
iv © ISO 2004 – All rights reserved
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INTERNATIONAL STANDARD ISO 21028-1:2004(E)
Cryogenic vessels — Toughness requirements for materials at
cryogenic temperature —
Part 1:
Temperatures below −− 80 °C
1 Scope

This part of ISO 21028 specifies the toughness requirements of metallic materials for use at temperatures

below − 80 °C to ensure their suitability for cryogenic vessels. It is not applicable to unalloyed steels and cast

materials.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
ISO 148 (all parts), Metallic materials — Charpy pendulum impact test

EN 10028-4:1994, Flat products made of steels for pressure purposes — Part 4: Nickel alloy steels with

specified low temperature properties
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
minimum working temperature

lowest temperature likely to be reached by the vessel or by one of the vessel components during operation

4 Toughness requirements
4.1 General

The toughness of the materials used shall be either guaranteed by the material producer or verified by

conducting an impact test on the material in accordance with the requirements given in this clause.

Additionally, impact tests shall be performed on welded vessels as part of welding procedure qualification and

production weld tests as specified in the product standard.
© ISO 2004 – All rights reserved 1
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ISO 21028-1:2004(E)
4.2 Steels

The materials used for the manufacture of the vessels, the welds and the heat-affected zone shall meet either

the minimum impact energy or lateral expansion values.
a) Minimum impact energy value: 34 J/cm .
NOTE 1 34 J/cm corresponds to a 27 J energy for a full-size specimen.
b) Minimum lateral expansion value: 0,38 mm.

These requirements apply to parent metal, welds and heat-affected zones at minimum working temperature

and for the following steels.
 Ferritic alloy steel Ni u 9 %
NOTE 2 Product standards could specify more str
...

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