ISO 15179:2012
(Main)Hot-rolled twin-roll cast steel sheet of structural quality and high strength steel
Hot-rolled twin-roll cast steel sheet of structural quality and high strength steel
This International Standard specifies the characteristics of hot-rolled twin-roll cast steel sheet of structural quality and high strength steel. The product is intended for applications where specific mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. This product is produced on a wide strip mill, not a plate mill. Structural quality twin-roll cast steel sheet is a carbon steel produced to specified mechanical properties and is available in a number of grades (see Table 5). High strength twin-roll cast steel sheet, strengthened by microalloys, is produced to specified mechanical properties and is available in a number of grades and classes (see Table 6).
Tôles en acier de construction et en acier à haute résistance laminées à chaud par coulée entre cylindres
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 15179
First edition
2012-03-15
Hot-rolled twin-roll cast steel sheet of
structural quality and high strength steel
Tôles en acier de construction et en acier à haute résistance laminées à
chaud par coulée entre cylindres
Reference number
ISO 15179:2012(E)
©
ISO 2012
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ISO 15179:2012(E)
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© ISO 2012
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ii © ISO 2012 – All rights reserved
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ISO 15179:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Thickness . 2
5 Conditions of manufacture . 2
5.1 Steelmaking . 2
5.2 Chemical composition . 2
5.3 Chemical analysis . 2
5.4 Weldability . 4
5.5 Application . 4
5.6 Mechanical properties . 4
5.7 Surface condition . 6
5.8 Oiling . 6
6 Dimensional tolerances . 6
7 Sampling . 7
8 Mechanical property tests . 7
8.1 General . 7
8.2 Retests . 7
8.3 Machining and flaws . 7
8.4 Elongation . 7
9 Resubmission . 7
10 Workmanship . 7
11 Inspection and acceptance . 7
12 Coil size . 8
13 Marking . 8
14 Information to be supplied by the purchaser . 8
Bibliography . 9
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ISO 15179:2012(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 15179 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat
rolled products.
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INTERNATIONAL STANDARD ISO 15179:2012(E)
Hot-rolled twin-roll cast steel sheet of structural quality and
high strength steel
1 Scope
This International Standard specifies the characteristics of hot-rolled twin-roll cast steel sheet of structural quality
and high strength steel. The product is intended for applications where specific mechanical properties are
required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures.
This product is produced on a wide strip mill, not a plate mill.
Structural quality twin-roll cast steel sheet is a carbon steel produced to specified mechanical properties and is
available in a number of grades (see Table 5).
High strength twin-roll cast steel sheet, strengthened by microalloys, is produced to specified mechanical
properties and is available in a number of grades and classes (see Table 6).
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 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.
3.1
microalloying element
element, such as niobium, vanadium, titanium, added singly or in combination to obtain higher strength levels
combined with better formability, weldability and toughness as compared with non-alloy steel produced to
equivalent strength
3.2
hot-rolled descaled steel sheet
hot-rolled steel sheet from which oxide or scale has been removed, commonly by pickling in an acid solution
3.3
mill edge
normal side edge without any definite contour produced in hot rolling
NOTE Mill edges may contain some irregularities, such as cracked or torn edges or thin (feathered) edges.
3.4
sheared edge
edge product normal edge obtained by shearing, slitting or trimming a mill edge product
NOTE Normal processing does not necessarily provide a definite positioning of the slitting burr.
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ISO 15179:2012(E)
3.5
twin-roll cast steel sheet
steel sheet produced by casting to near final thickness directly from the liquid metal with minimal hot rolling to
achieve the final thickness
4 Thickness
4.1 This product is commonly produced in thicknesses from 0,7 mm to 2,0 mm, inclusive, and widths of up to
2 000 mm maximum.
4.2 Hot-rolled sheets less than 600 mm wide may be slit from wide sheets and may be considered sheets.
5 Conditions of manufacture
5.1 Steelmaking
Unless otherwise agreed by the interested parties, 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 steel-making process being used.
5.2 Chemical composition
The chemical composition (heat analysis) shall not exceed the values given in Tables 1, 2 and 3.
5.3 Chemical analysis
5.3.1 Heat analysis
A heat analysis of each heat of steel shall be carried out by the manufacturer in order to determine the
percentage of all appropriate elements listed in Tables 1, 2 and 3. On request, this analysis shall be reported
to the purchaser or his representative.
5.3.2 Product analysis
A product analysis may be carried out by the purchaser in order to verify the specified analysis of the product.
For killed steels, the sampling method shall be agreed upon between the interested parties at the time of
ordering. The product analysis tolerances shall be in accordance with Table 4.
a
Table 1 — Chemical requirements — Heat analysis structural quality
Mass fractions in per cent maximum
Class C Mn P S Si
All grades A 0,25 1,35 0,040 0,035 –
a
Where the “–” appears in this table, there is no requirement, but the analysis shall be
reported.
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ISO 15179:2012(E)
a
Table 2 — Chemical requirements — Heat analysis — High strength steel
Mass fractions in per cent maximum
a d d d a
Designation C Mn P S Si V Ti Nb N
min. min. min.
c
HSS
b
Grade 310 Class 1 0,22 1,35 0,04 0,04 – 0,008 0,008 0,008 –
Grade 310 Class 2 0,15 1,35 0,04 0,04 – 0,008 0,008 0,008 –
b
Grade 340 Class 1 0,23 1,35 0,04 0,04 – 0,008 0,008 0,008 –
Grade 340 Class 2 0,15 1,35 0,04 0,04 – 0,008 0,008 0,008 –
b
Grade 380 Class 1 0.25 1,35 0,04 0,04 – 0,008 0,00 0,008 –
Grade 380 Class 2 0,15 1,35 0,04 0,04 – 0,008 0,008 0,008 –
Grade 410 Class 1 0,26 1,50 0,04 0,04 – 0,008 0,008 0,008 –
Grade 410 Class 2 0,15 1,50 0,04 0,04 – 0,008 0,008 0,008 –
c
Grade 450 Class 1 0,26 1,50 0,04 0,04 – 0,008
...
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