ISO 5952:2019

INTERNATIONAL ISO
STANDARD 5952
Fifth edition
2019-01
Steel sheet, hot-rolled, of structural
quality with improved atmospheric
corrosion resistance
Tôles en acier de construction laminées à chaud en continu à
résistance améliorée à la corrosion atmosphérique
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
5 Conditions of manufacture . 2
5.1 Steelmaking . 2
5.2 Chemical composition . 2
5.3 Chemical analysis . 2
5.3.1 Heat analysis . . 2
5.3.2 Product analysis . 3
5.4 Mechanical properties . 4
5.5 Application . 4
5.6 Weldability . 4
5.7 Surface condition . 4
5.8 Oiling . 4
5.9 Corrosion resistance . 4
5.10 Dimensional and shape tolerances . 4
6 Tensile test sampling . 4
7 Tensile test method. 5
8 Retests . 6
8.1 Machining and flaws. 6
8.2 Elongation . 6
8.3 Additional tests . 6
9 Resubmission . 6
10 Workmanship . 6
11 Inspection and acceptance . 6
12 Coil size . 7
13 Marking . 7
14 Information to be supplied by the purchaser. 7
Annex A (informative) Guidelines for estimating the atmospheric corrosion resistanceof
low-alloy steels . 8
Annex B (informative) Additional information for the use of steel with improved
atmospheric corrosion resistance .10
Bibliography .11
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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous
mill flat rolled products.
This fifth edition cancels and replaces the fourth edition (ISO 5952:2011), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— tables have been updated throughout for clarity;
— additional editorial changes for clarity.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 5952:2019(E)
Steel sheet, hot-rolled, of structural quality with improved
atmospheric corrosion resistance
1 Scope
This document specifies requirements for steel sheet hot-rolled of structural quality with improved
atmospheric corrosion resistance, also known as weather-resistant structural steel. It is produced in
the grades and classes listed in Table 1. The product is intended for applications where requirements
are for mechanical properties and increased resistance to atmospheric corrosion. It is generally used in
the delivered condition and is intended for bolted, riveted or welded structures.
This document does not apply to the following steel qualities:
— steels intended for boilers and pressure vessels, and steels designated as commercial quality and
drawing qualities (see ISO 3573);
— steels produced on reversing mills and designated with improved atmospheric corrosion resistance
(see ISO 630-5);
— steels designated with structural quality (see ISO 4995), and high yield strength structural quality
(see ISO 4996);
— steels designated with higher yield strength with improved formability (see ISO 5951).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 16160, Hot-rolled steel sheet products — Dimensional and shape tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
improved atmospheric corrosion resistance
characteristic achieved by intentional addition of a certain number of alloying elements, such as P, Cu,
Cr, Ni, etc., providing a chemical composition which promotes the formation of a protective oxide layer
on the product
Note 1 to entry: The degree of corrosion resistance is based on data acceptable to the purchaser.
3.2
hot-rolled steel sheet
product obtained by rolling heated steel through a continuous-type wide strip mill to the required
sheet thickness
Note 1 to entry: The product has a surface covered with oxide or scale resulting from the hot-rolling operation.
3.3
hot-rolled, descaled steel sheet
hot-rolled steel sheet (3.2) from which oxide or scale has been removed by pickling in an acid solution or
by mechanical means such as grit blasting
Note 1 to entry: Some change in properties can result from mechanical descaling.
3.4
lot
up to a specified quantity of steel sheet of the same designation rolled to the same thickness and coating
condition
4 Dimensions
4.1 This product is commonly produced in the range of thicknesses 1,6 mm up to and including
12,5 mm and widths of 600 mm and over, in coils and cut lengths.
4.2 Hot-rolled sheet less than 600 mm wide can be slit from wide sheet and will be considered as
not strip.
NOTE Hot-rolled sheet up to but not including 3 mm in thickness is commonly known as sheet. Hot-rolled
sheet 3 mm and over in thickness is commonly known as either “sheet” or “plate”.
5 Conditions of manufacture
5.1 Steelmaking
Unless otherwise agreed upon, the processes used in making the steel and in manufacturing hot-rolled
sheet are left to the discretion of the manufacturer. On request, the purchaser shall be informed of the
steelmaking process being used.
5.2 Chemical composition
5.2.1 The chemical composition (heat analysis) shall conform to the requirements given in Table 1.
5.2.2 When selecting the grade or chemical composition to be used, attention should be directed to the
appropriate welding procedure to be followed (see 5.6).
5.3 Chemical analysis
5.3.1 Heat analysis
An analysis of each heat shall be made by the manufacturer in order to determine conformity with the
requirements given in Table 1. On request, a report of the heat analysis shall be made available to the
purchaser or the purchaser’s representative. Each of the elements listed in Table 1 shall be included in
the report of the heat analysis.
2 © ISO 2019 – All rights reserved

Table 1 — Chemical composition (heat analysis)
Mass fractions in percent
Method
C S
a
Grade Class of deoxi- Mn Si P Cu Ni Cr Mo Zr
max. max.
b
dation
HSA B NE 0,13 0,20 to 0,10 to 0,040 0,035 0,25 to 0,65 0,40 to
c c
235W 0,60 max. 0,55 max. 0,80
D CS 0,40
HSA B NE 0,18 1,25 0,15 to 0,035 0,035 0,30 to 0,05 to 0,45 to
c c
245W max. 0,65 max. 0,50 0,30 0,75
D CS
HSA A NE 0,12 1,00 0,20 to 0,06 to 0,035 0,25 to 0,65 0,30 to
c c
355W1 max. 0,75 0,15 0,55 max. 1,25
D CS
HSA C NE 0,16 0,50 to 0,50 0,035 0,035 0,25 to 0,65 0,40 to 0,30 0,15
355W2 1,50 max. max. 0,55 max. 0,80 max. max.
D CS
HSA B NE 0,18 1,40 0,15 to 0,035 0,035 0,30 to 0,05 to 0,45 to
c c
365W max. 0,65 max. 0,50 0,30 0,75
D CS
NOTE Each grade can contain one or more microalloying elements, such as vanadium, titanium, niobium, etc.
a
Class A steels satisfy only moderate loading conditions.
Class B steels are intended for use in welded structures or structural parts, subjected to normal loading conditions.
Class C steels are to be used in cases where, owing to loading conditions and the general design of the structure, some
resistance to brittle fracture is necessary.
Class D steels are to be used for structures or structural parts where, owing to loading conditions and the general design of
the structure, a high resistance to brittle fracture is necessary.
b
NE — non-rimming.
CS — aluminium killed (0,020 % minimum total aluminium).
c
The total content of Mo, Nb, Ti, V and Zr is not to exceed 0,15 %.
5.3.2 Product analysis
A product analysis may be made by the purchaser i
...