ISO 5952:1998
(Main)Continuously hot-rolled steel sheet of structural quality with improved atmospheric corrosion resistance
Continuously hot-rolled steel sheet 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
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 5952
Second edition
1998-06-01
Corrected and reprinted
1999-08-01
Continuously hot-rolled steel sheet
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
A
Reference number
ISO 5952:1998(E)
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ISO 5952:1998(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.
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.
International Standard ISO 5952 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 5952:1983), which has been technically revised.
Annexes A to C of this International Standard are for information only.
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
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INTERNATIONAL STANDARD ISO ISO 5952:1998(E)
Continuously hot-rolled steel sheet of structural quality
with improved atmospheric corrosion resistance
1 Scope
1.1 This International Standard applies to continuously hot-rolled steel sheet (see 3.2) of structural quality having
improved atmospheric corrosion resistance, also known as weather-resistant structural steel. It is produced in the
grades and classes listed in tables 1 and 2. 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.
1.2 This product is commonly produced in the range of thicknesses 1,6 mm and above and widths of 600 mm and
over, in coils and cut lengths.
1.3 Hot-rolled sheet less than 600 mm wide may be slit from wide sheet and will be considered as sheet.
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”.
1.4 This International Standard does not cover the following steel qualities:
— steels intended for boilers or pressure vessels, or steels designated as commercial quality or drawing qualities
(see ISO 3573);
— steels produced on reversing mills and designated as improved atmospheric corrosion resistance (see
ISO 4952);
— steels designated as structural quality (see ISO 4995) or high yield strength structural quality (see ISO 4996);
— steels designated as higher yield strength with improved formability (see ISO 5951).
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 148:1983, Steel — Charpy impact test (V-notch).
1)
ISO 6892:— , Metallic materials — Tensile testing at ambient temperature.
IIS/IIW 382-71, Guide to the welding and weldability of C-Mn steels and C-Mn microalloyed steels.
1) To be published. (Revision of ISO 6892:1984)
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ISO 5952:1998(E)
Table 1 — Chemical composition (heat analysis) (normal standard compositions, see 5.2)
1) 2)
Grade Class Method CMn Si P S Cu Ni Cr Mo Zr
HSA 235W B NE
0,13 0,20 to 0,10 to 0,040 0,035 0,25 to 0,65 0,40 to
——
max. 0,60 0,40 max. max. 0,55 max. 0,80
DCS
HSA 245W B NE
0,18 1,25 0,15 to 0,035 0,035 0,30 to 0,05 to 0,45 to
3) 3)
max. max. 0,65 max. max. 0,50 0,30 0,75
DCS
HSA 355W1 A NE
0,12 1,00 0,20 to 0,06 to 0,035 0,25 to 0,65 0,30 to
——
max. max. 0,75 0,15 max. 0,55 max. 1,25
DCS
HSA 355W2 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
max. 1,50 max. max. max. 0,55 max. 0,80 max. max.
DCS
HSA 365W B NE
0,18 1,40 0,15 to 0,035 0,035 0,30 to 0,05 to 0,45 to
3) 3)
max. max. 0,65 max. max. 0,50 0,30 0,75
DCS
NOTE — Each grade may contain one or more microalloying elements such as vanadium, titanium, niobium, etc.
1) 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.
2) NE — non-rimming
CS — aluminium killed (0,020 % minimum total aluminium)
3) Total content of Mo, Nb, Ti, V and Zr not to exceed 0,15 %.
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1 improved atmospheric corrosion resistance: A characteristic achieved by intentional addition of a certain
number of alloying elements such as P, Cu, Cr, Ni, Mo, etc., providing a chemical composition which promotes the
formation of a protective oxide layer on the product. The degree of corrosion resistance is based on data acceptable
to the purchaser.
3.2 hot-rolled steel sheet: A product obtained by rolling heated steel through a continuous-type wide strip mill to the
required sheet thickness. 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 from which oxide or scale has been removed by
pickling in an acid solution or by mechanical means such as grit blasting. Some change in properties may result
from mechanical descaling.
3.4 mill edge: A normal edge without any definite contour, produced in hot rolling. Mill edges may contain some
irregularities such as cracked or torn edges or thin (feathered) edges.
3.5 sheared edge: A normal edge obtained by shearing, slitting or trimming a mill edge product. Normal
processing does not necessarily provide a definite positioning of the slitting burr.
NOTE — Material is normally supplied as described in 3.4 and 3.5. Other edges may be supplied as agreed upon.
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Table 2 — Mechanical properties
2) 3)
Grade Class R A
e
R
m
min
min
2
N/mm
2 %
N/mm
Nominal thickness e , 3 3 < e , 6 6 < e
mm mm mm
, 3 > 3 L = 50 L = 80LS= 56, 5 L = 50LS= 56, 5 L = 200
o o o o
o o o o
mm mm mm mm mm mm
HSA 235W B and D 235 360 to 510 340 to 470 20 18 24 22 24 17
HSA 245W B and D 245 400 to 540 20 18 24 22 24 17
HSA 355W1 A and D 355 510 to 680 490 to 630 15 15 20 19 24 18
HSA 355W2 C and D 355 510 to 680 490 to 630 18 15 20 22 24 18
HSA 365W B and D 365 490 to 610 15 12 17 19 21 15
NOTE
R = yield strength;
e
R = tensile strength;
m
A = percentage elongation after fracture;
L = gauge length on test piece;
o
e = thickness of steel sheet, in millimetres;
= original cross-sectional area of gauge length;
S
o
2
1 N/mm = 1 MPa
1) 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.
2) The yield strength can be measured either by 0,5 % total elongation proof stress R (proof stress under load) or by 0,2 % offset R
t0,5 p0,2
when a definite yield phenomenon is not present.
3) For thicknesses up to 3 mm, use either L = 50 mm or L = 80 mm. For thicknesses 3 mm to 6 mm, use LS= 56, 5 or L = 50 mm.
o
o o o o
For thicknesses 6 mm and over, use LS= 56, 5 or L = 200 mm. In case of dispute however, only the results obtained on a
o o o
proportional test piece will be valid for material 3 mm and over in thickness.
4 Surface characteristics
4.1 Surface condition
Oxide or scale in hot-rolled steel sheet is subject to variations in thickness, adherence and colour. Removal of the
oxide or scale by pickling or blast cleaning may disclose surface imperfections not readily visible prior to this
operation.
4.2 Oiling
As a deterrent to rusting, a coating of oil is usually applied to hot-rolled, descaled steel sheet but sheet may be
furnished unoiled, if required. The oil is not intended as a forming lubricant and shall be easily removable with
degreasing chemicals.
When requested, the manufacturer shall advise the purchaser which type of oil has been used.
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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 values given in table 1, unless otherwise
agreed upon between the interested parties.
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 5.4).
5.3 Chemical analysis
5.3.1 Heat analysis
An analysis of each heat of steel shall be made by the manufacturer to determine compliance with the requirements
given in table 1. On request, at the time of ordering, this analysis shall be reported to the purchaser or his
representative.
5.3.2 Product analysis
A product analysis may be made by the purchaser to verify the specified analysis of the product and shall take into
consideration any normal heterogeneity.
For killed steels, the sampling method and deviation limits shall be agreed upon between the interested parties at
the time of ordering.
5.4 Weldability
This product is suitable for welding if appropriate welding conditions are selected, such as the recommendations
given in IIS/IIW 382-71.
5.5 Application
It is desirable that the specified product be identified for fabrication by name of the part or by intended application.
Proper identification of the part may include visual examination, prints or description, or a combination of these.
5.6 Mechanical properties
At the time that the steel is made available for shipment, the mechanical properties shall be as stated in table 2
when they are determined on test pieces obtained according to the requirements of clause 8. Any additional
property requirements specified or required shall be subject to agreement before ordering. Such additional
requirements may include characterizations or prescribed values for properties such as impact for sheet over 6 mm
in thickness (see 8.2).
5.7 Corrosion resistance
The resistance of these steels to atmospheric corrosion is due to the formation of a protective oxide layer. The
formation of this protective layer depends not only on chemical composition such as the distinctive differences
between the analyses of the various grades, but also on a number of factors such as surrounding atmosphere,
design, etc., over which the steel producer has no control. See annexes A and B for information on estimating the
corrosion resistance and cautions concerning the use of these steels.
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6 Dimensional tolerances
6.1 Dimensional tolerances applicable to hot-rolled steel sheet of structural quality with improved atmospheric
corrosion resistance shall be as given in tables 3 to 11. See also figures 1 to 3.
Restricted thickness tolerances are given in table 4.
7 Tensile test sampling
One representative sample for the tensile test required in table 2 shall be taken from each lot of sheet for shipment.
A lot consists of 50 t or less of sheet of the same designation rolled to the same thickness and condition.
8 Mechanical property tests
8.1 Tensile test requirements
The tensile test shall be carried out in accordance with ISO 6892. Transverse test pieces shall be taken mid-way
between the centre and edge of the sheet as rolled.
Table 3 — Normal thickness tolerances (±) for hot-rolled steel sheet (including descaled sheet), coils and
cut lengths — Structural quality with improved corrosion resistance (Grades HSA 235W, HSA 245W)
Dimensions and tolerances in millimetres
1)
Specified thickness
Specified width
< 2,0 . 2,0 . 2,5 . 3,0 . 4,0 . 5,0 . 6,0 . 8,0 .10,0
< 2,5 < 3,0 < 4,0 < 5,0 < 6,0 < 8,0 < 10,0 <12,5
. 600 < 1 200 0,17 0,18 0,20 0,22 0,24 0,26 0,29 0,32 0,35
. 1 200 < 1 500 0,19 0,21 0,22 0,24 0,26 0,28 0,30 0,33 0,36
. 1 500 < 1 800 0,21 0,23 0,24 0.26 0,28 0,29 0,31 0,34 0,37
. 1 800 — 0,25 0,26 0,27 0,29 0,31 0,35 0,40 0,43
NOTES
1 The values specified do not apply to the uncropped ends for a length, l, of a mill edge coil. The length, l, would be calculated using
the following formula:
90
length, l, in metres =
thickness in mm
provided that the result was not greater than 20 m, inclusive of both ends.
2 For Grades HSA 355W1, HSA 355W2 and HSA 365W, the values in this table should be increased by 10 %.
1) Thickness is measured at any point on the sheet not less than 40 mm from a side edge. For measurement on an untrimmed edge
sheet nearer to an edge than 40 mm and on a trimmed edge sheet nearer to an edge than 25 mm values of tolerances are subject to
negotiation.
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Table 4 — Restricted thickness tolerances (±) for hot rolled steel sheet (including descaled sheet), coils
and cut lengths-structural quality with improved corrosion resistance (Grades HSA 235W, HSA 245W)
Dimensions and tolerances in millimetres
1)
Specified thickness
Specified width
< 2,0 . 2,0 . 2,5 . 3,0 . 4,0 . 5,0 . 6,0 . 8,0 .10,0
< 2,5 < 3,0 < 4,0 < 5,0 < 6,0 < 8,0 < 10,0 <12,5
. 600 < 1 200 0,13 0,14 0,15 0,17 0,19 0,21 0,23 0,26 0,28
. 1 200 < 1 500 0,14 0,15 0,17 0,18 0,21 0,22 0,24 0,26 0,29
. 1 500 < 1 800 0,14 0,17 0,19 0,21 0,22 0,23 0,25 0,27 0,30
. 1 800 0,20 0,21 0,22 0,23 0,25 0,28 0,32 0,36
NOTES
1 The values specified do not apply to the uncropped ends for a length, l, of a mill edge coil. The length, l, would be calculated using
the following formula:
90
length, l, in metres =
thickness in mm
provided that the result was not greater than 20 m, inclusive of both ends.
2 For Grades HSA 355W1, HSA 35
...
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