ISO 16172:2011

INTERNATIONAL ISO
STANDARD 16172
Second edition
2011-11-01
Continuous hot-dip metallic-coated steel
sheet for corrugated steel pipe
Tôles en acier revêtues en continu par immersion à chaud pour tuyaux
d’acier strié
Reference number
©
ISO 2011
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ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviations . 1
3.1 Terms and definitions . 1
3.2 Abbreviations . 2
4 Requirements . 2
4.1 Chemical composition . 2
4.2 Mechanical properties . 2
5 Coating requirements . 3
5.1 Coating mass . 3
5.2 Coating adhesion . 3
5.3 Surface treatment . 3
6 Dimension and tolerances . 3
6.1 Thickness . 3
6.2 Length . 4
6.3 Flat sheet . 4
6.4 Other dimensions . 4
7 Sampling . 4
7.1 Chemical composition . 4
7.2 Mechanical properties . 4
7.3 Coating tests . 5
8 Test methods . 5
8.1 Tensile tests . 5
8.2 Coating mass . 5
9 Resubmission . 5
10 Workmanship . 5
11 Inspection and acceptance . 6
12 Certification . 6
13 Marking . 6
14 Information to be supplied by the purchaser . 6
Bibliography . 9
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 16172 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat
rolled products.
This second edition cancels and replaces the first edition (ISO 16172:2006), which has been technically revised.
iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 16172:2011(E)
Continuous hot-dip metallic-coated steel sheet for corrugated
steel pipe
1 Scope
This International Standard specifies the requirements for steel sheet used in the manufacture of corrugated
steel pipe for storm sewers, culverts, drains, and similar uses. It covers sheet which is metallic coated by the
continuous hot-dip process and is furnished in coils, flat cut lengths, and corrugated cut lengths.
Several metallic-coated materials are covered which relies on users to determine which product best serves
their needs. Four different metallic coatings are included:
— zinc coated;
— zinc-5 % aluminium-mischmetal alloy coated;
— 55 % aluminum-zinc alloy coated;
— Al-Si alloy coated.
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 1460, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric determination
of the mass per unit area
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic
method
ISO 3497, Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 16163, Continuously hot-dipped coated steel sheet products — Dimensional and shape tolerances
3 Terms, definitions and abbreviations
For the purposes of this document, the following terms, definitions and abbreviations apply.
3.1 Terms and definitions
3.1.1
fabricator
〈for corrugated metal pipe〉 the organization that produces the finished pipe
3.1.2
fabricator
〈for structural plate pipe〉 the organization that processes flat sheets and other items necessary for the field
assembly of finished products
3.1.3
manufacturer
〈for corrugated metal pipe〉 the organization that produces the metal sheet from which pipe is made
3.1.4
purchaser
〈for corrugated metal pipe〉 the person or agency that purchases the finished pipe
NOTE With regard to this International Standard for sheet for corrugated steel pipe, the fabricator may also be
considered as the purchaser of the sheet, where that term is used in this International Standard. Such an interpretation will
not restrict the purchaser of finished pipe from enforcing any provisions of this specification.
3.1.5
normal spangle coating
coating formed as a result of the unrestricted growth of zinc or zinc alloy crystals during normal solidification
of the coating
3.1.6
minimized spangle coating
a finer metallurgical coating formed as a result of treatment to restrict the formation of the normal coarse-grain
coating structure of the Zn-5Al-MM coating type
3.2 Abbreviations
Zn: zinc
Zn-5Al-MM: zinc-5 % aluminum-mischmetal alloy
55Al-Zn: 55 % aluminum-zinc alloy
Al-Si: aluminum-silicon alloy
4 Requirements
4.1 Chemical composition
The chemical composition (heat analysis) of the base metal shall conform to the requirements of Table 1.
4.2 Mechanical properties
The metallic-coated sheet shall conform to the requirements listed in Table 2.
Table 1 — Chemical composition
Element Heat analysis Product analysis
Sulfur, max., % 0,05 0,06
Sum of carbon, manganese,
0,70 0,74
phosphorus, sulfur and silicon, max., %
2 © ISO 2011 – All rights reserved

a
Table 2 — Mechanical property requirements (properties of flat sheet prior to fabrication)
b
Tensile strength , min., MPa 310
b
Yield strength , min. MPa 230
c
Elongation, in 50 mm , min., % 20
a
To determine conformance with this specification, round each value for tensile strength and yield strength to the nearest 1 MPa
and each value for elongation to the nearest 1 %.
b
Yield strength and tensile strength are based on the thickness of the base metal. If tests are made after coating, determine the
base metal thickness after stripping the co
...