ISO 23430:2019
(Main)Ships and marine technology — Specification of high manganese austenitic steel thin strips used for LNG tanks on board ships
Ships and marine technology — Specification of high manganese austenitic steel thin strips used for LNG tanks on board ships
This document describes the specification of high manganese (Mn) austenitic steel thin strips with good weldability and good resistance to atmospheric corrosion intended to be used for LNG tanks on board ships. It covers strips with a thickness ranging from 0,3 mm to 6,0 mm.
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General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 23430
First edition
2019-12
Ships and marine technology —
Specification of high manganese
austenitic steel thin strips used for
LNG tanks on board ships
Reference number
ISO 23430:2019(E)
©
ISO 2019
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ISO 23430:2019(E)
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ii © ISO 2019 – All rights reserved
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ISO 23430:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Required specification. 2
5 Manufacture . 2
5.1 Steel-making practice . 2
5.2 Steel strips . 2
5.3 Dimension . 2
6 Chemical composition and mechanical properties . 2
6.1 Chemical composition . 2
6.2 Mechanical properties . 2
6.2.1 Requirements of tensile strength and yield strength . 2
6.2.2 Toughness requirements . 3
6.2.3 Bend test . 3
6.3 Supplementary requirements . 3
7 Test procedures . 4
7.1 Mechanical test . 4
7.2 Retest procedures . 4
8 Weldability . 4
9 Marking . 4
10 Documentation . 4
Bibliography . 5
© ISO 2019 – All rights reserved iii
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ISO 23430:2019(E)
Foreword
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
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iv © ISO 2019 – All rights reserved
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ISO 23430:2019(E)
Introduction
There have been several requirements regarding metallic materials for cryogenic applications since the
adoption of the IGC and IGF Codes. Recently, a new high manganese austenitic steel has been proposed
[2]
for thick plates and piping systems of LNG carriers and LNG-fuelled ships . However, only plates
with a thickness ranging from 6 mm to 30 mm are specified and the target tank capacity is limited to
3
30 000 m .
This document covers a newly developed high manganese austenitic steel for thin strip application. This
steel has mechanical properties comparable or even higher than those of materials for cryogenic service
[3] [4]
listed in both the IGC Code and IGF Code , with good weldability and good resistance to atmospheric
corrosion. Consequently, this high manganese austenitic steel is intended to satisfy the strength
requirements of the str
...
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