Hot rolled products of structural steels – Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels

EN 10025-3:2019

(Supersedes EN 10025-3:2004)

European foreword

This document (EN 10025-3:2019) has been prepared by Technical Committee CEN/TC 459/SC 3 "Structural steels other than reinforcements", the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2020 and conflicting national standards shall be withdrawn at the latest by February 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 10025-3:2004.

This document consists of the following parts, under the general title Hot rolled products of structural steels:

For a short transition period there will be a coexistence of EN 10025-1:2004 with EN 10025-2:2018 to -6:2018, since the new EN 10025-1 has to fulfil the requirements of the CPR and will therefore be published later. For this short transition period up‑to‑the publication of the next edition of part 1 the following are to be taken into account for EN 10025-1:2004:

The main changes with respect to the previous edition are listed below:

According to the CEN‑CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Republic of North Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

1 Scope

This document specifies technical delivery conditions for flat and long products of hot rolled weldable fine grain structural steels in the normalized/normalized rolled delivery condition in the grades and qualities given in Tables 1 to 3 (chemical composition) and Tables 4 to 6 (mechanical properties) in thickness ≤ 250 mm.

The steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storages tanks, water supply tanks, etc., for service at ambient and low temperatures.

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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 10079 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:

IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp

3.1 normalized rolled

rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing so that the specified values of the mechanical properties are retained even after normalizing

Note 1 to entry: In international publications for both the normalizing rolling, as well as the thermomechanical rolling, the expression "controlled rolling" may be found. However in view of the different applicability of the products a distinction of the terms is necessary.

3.2 normalizing

heat treatment consisting of austenitizing followed by air cooling

3.3 fine grain steels

steels with fine grain structure with an equivalent index of ferritic grain size ≥ 6

Note 1 to entry: For the determination of grain sizes see EN ISO 643.

4 Classification and designation

4.1 Classification

4.1.1 Main quality classes

The steel grade S275 specified in this document shall be classified as non‑alloy quality steel and steel grade S355 shall be classified as alloy quality steel and the steel grades S420 and S460 specified in this document shall be classified as alloy special steels according to EN 10020.

4.1.2 Grades and qualities

This document specifies four steel grades S275, S355, S420 and S460.

All the steel grades may be supplied in the following qualities as specified at the time of the order:

4.2 Designation

4.2.1 For the steel grades covered by this document the steel names shall be allocated in accordance with EN 10027-1; the steel numbers shall be allocated in accordance with EN 10027-2.

4.2.2 The designation shall consist of:

EXAMPLE Normalized/normalized rolled structural steel (S) with a specified minimum yield strength at room temperature of 355 MPa, and with a specified minimum of impact energy at –50°C.

EN 10025-3 – S355NL
Or
EN 10025-3 – 1.0546

5 Information to be supplied by the purchaser

5.1 Mandatory information

The following information shall be supplied by the purchaser at the time of the order:

5.2 Options

A number of options are specified in Clause 13. In the event that the purchaser does not indicate his wish to implement any of these options, the supplier shall supply in accordance with the basic specification, see 5.1 a) to d) and f).

6 Manufacturing process

6.1 Steel making process

The steel making process is at the discretion of the manufacturer with the exclusion of the open hearth (Siemens‑Martin) process.

See Option 1, Clause 13 (details of manufacturing process).

6.2 Deoxidation and grain structure

Steels of EN 10025-3 shall

6.3 Delivery conditions

The products shall be supplied normalized or in an equivalent condition obtained by normalizing rolling as defined in Clause 3.

For steels with a minimum yield strength ≥ 420 MPa, delayed cooling or additional tempering may be carried out after normalizing or normalizing rolling. If such a treatment is performed, this shall be noted in the inspection document.

7 Requirements

7.1 General

The requirements of 7.2 and 7.3 apply for sampling, preparation of test pieces and testing specified in Clauses 9 and 10.

7.2 Chemical composition

7.2.1 The chemical composition determined by heat analysis shall comply with the specified values of Table 1.

For elements not defined in the table for the chemical composition for heat analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values.

7.2.2 The limits applicable for the product analysis are given in Table 2. The product analysis shall be carried out when specified at the time of the order.

See Option 2, Clause 13 (product analysis).

For elements not defined in the table for the chemical composition for product analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values.

7.2.3 The maximum carbon equivalent values based on the heat analysis, given in Table 3 shall apply.

For determining the carbon equivalent value the following IIW (International Institute of Welding) formula shall be used:

CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15

7.2.4 When products are supplied with a control on Si e.g. for hot‑dip zinc‑coating so that there could be a need to increase the content of other elements like C and Mn to achieve the required tensile properties, the maximum carbon equivalent values of Table 3 shall be increased as follows:

Table 1 Chemical composition of the heat analysis
Designation C Si Mn P S Nb V Al total Ti Cr Ni Mo Cu N
Steel name Steel number max. max. max. a max. a b max. max. min.c max. max. max. max. max. max.
S275N 1.0490 0,18 0,40 0,50 to 1,50 0,030 0,025 0,05 0,05 0,020 0,05 0,30 0,30 0,10 0,55 0,015
S275NL 1.0491 0,16 0,40 0,025 0,020
S355N 1.0545 0,20 0,50 0,90 to 1,65 0,030 0,025 0,05 0,12 0,020 0,05 0,30 0,50 0,10 0,55 0,015
S355NL 1.0546 0,18 0,025 0,020
S420N 1.8912 0,20 0,60 1,00 to 1,70 0,030 0,025 0,05 0,20 0,020 0,05 0,30 0,80 0,10 0,55 0,025
S420NL 1.8902 0,025 0,020
S460N d 1.8901 d 0,20 0,60 1,00 to 1,70 0,030 0,025 0,05 0,20 0,020 0,05 0,30 0,80 0,10 0,55 0,025
S460NL d 1.8903 d 0,025 0,020
a For long products the P and S content can be 0,005 % higher.
b For some applications, e.g. for railways, a maximum S content of 0,010 % may be agreed upon at the time of the order, see Option 32, Clause 13.
c If sufficient other N-binding elements are present the minimum total Al content does not apply.
d V + Nb + Ti ≤ 0,22 % and Mo + Cr ≤ 0,30%.
Table 2 - Chemical composition of the product analysis based on Table 1
Steel number C max. Si max. Mn P max.a S max. a b Nb max. V max. Al total min.c Ti max. Cr max. Ni max. Mo max. Cu max. N max.
1.0490 0,20 0,45 0,45 to 1,60 0,035 0,030 0,06 0,07 0,015 0,06 0,35 0,35 0,12 0,60 0,017
1.0491 0,18 0,45 0,45 to 1,60 0,030 0,025 0,06 0,07 0,015 0,06 0,35 0,35 0,13 0,60 0,017
1.0545 0,22 0,55 0,85 to 1,75 0,035 0,030 0,06 0,14 0,015 0,06 0,35 0,55 0,13 0,60 0,017
1.0546 0,20 0,55 0,85 to 1,75 0,030 0,025 0,06 0,14 0,015 0,06 0,35 0,55 0,13 0,60 0,017
1.8902 0,22 0,65 0,95 to 1,80 0,030 0,025 0,06 0,22 0,015 0,06 0,35 0,85 0,13 0,60 0,027
1.8912 0,22 0,65 0,95 to 1,80 0,030 0,025 0,06 0,22 0,015 0,06 0,35 0,85 0,13 0,60 0,027
1.8901 d 0,22 0,65 0,95 to 1,80 0,035 0,030 0,06 0,22 0,015 0,06 0,35 0,85 0,13 0,60 0,027
1.8903 d 0,22 0,65 0,95 to 1,80 0,030 0,025 0,06 0,22 0,015 0,06 0,35 0,85 0,13 0,60 0,027
a For long products the P and S content can be 0,005 % higher.
b For some applications, e.g for railways, a maximum S content of 0,012 % may be agreed upon at the time of the order. See Option 32, Clause 13.
c If sufficient other N-binding elements are present the minimum total Al content does not apply.
d V + Nb + Ti ≤ 0,26 % and Mo + Cr ≤ 0,38%.
Table 3 - Maximum CEV based on the heat analysis
Designation Maximum CEV in % for nominal product thickness in mm
Steel name Steel number ≤ 63 mm > 63 mm ≤ 100 mm > 100 mm ≤ 250 mm
S275Na 1.0490a 0,40 0,40 0,42
S275NLa 1.049a1
S355Na 1.0545a 0,43 0,45 0,45
S355NLa 1.0546a
S420N 1.8912 0,48 0,50 0,52
S420NL 1.8902
S460N 1.8901 0,53 0,54 0,55
S460NL 1.8903
a Max. CEV is increased for Option 5 (Clause 13), see 7.2.4.

7.3 Mechanical properties

7.3.1 General

7.3.1.1 Under the inspection and testing conditions, as specified in Clauses 8, 9 and 10, and in the delivery condition, as specified in 6.3, as well as after normalizing heat treatment after delivery (including delayed cooling or tempering if needed for steels with a minimum yield strength ≥ 420 MPa) the mechanical properties shall comply with the values given in Tables 4 to 6.

Stress relieving at more than 580 °C or for over 1 h can lead to a deterioration of the mechanical properties of the steel grades. For flat products the maximum stress relief temperature should be 560 °C. If the purchaser intends to stress relief the products at higher temperatures or for longer times than mentioned above the minimum values of the mechanical properties after such a treatment should be agreed upon at the time of the order.

7.3.1.2 For flat and bar products ordered and supplied in the normalized or normalized rolled condition the mechanical properties shall comply with the relevant tables for mechanical properties in the normalized or normalized rolled condition or after normalizing by heat treatment after delivery or after hot forming if the provisions of CEN/TR 10347 are satisfied.

7.3.1.3 For flat products the nominal thickness applies. For long products of irregular section the nominal thickness of that part from which the samples are taken applies (see Annex A).

7.3.2 Impact properties

7.3.2.1 The verification of the impact energy value shall be carried out, unless otherwise agreed upon (see 7.3.2.2 and 7.3.2.3) with longitudinal test pieces for:

7.3.2.2 Another temperature (given in Tables 5 and 6) may be agreed upon at the time of the order.

See Option 24, Clause 13 (Agreement on another impact test temperature).

7.3.2.3 If agreed upon at the time of the order the impact properties shall be verified on transverse V‑notch test pieces instead of longitudinal test pieces with minimum values as given in Table 6.

See Option 30, Clause 13 (Impact properties verified on transverse test pieces).

7.3.2.4 If specified at the time of the order for flat products out of each parent plate or coil the impact properties only or the impact properties and the tensile properties shall be verified.

See Option 13, Clause 13 (For flat products on each parent plate or coil impact properties only to be verified).
See Option 14, Clause 13 (For flat products on each parent plate or coil impact and tensile properties to be verified).

7.3.3 Improved deformation properties perpendicular to the surface

If agreed upon at the time of the order flat and long products shall comply with one of the requirements specified in EN 10164.

See Option 4, Clause 13 (Deformation properties perpendicular to the surface).

Table 4 - Mechanical properties - Tensile test properties at room temperature
Designation Minimum yield strength ReHa (MPa)
Nominal thickness mm		 Tensile strength Rma (MPa)
Nominal thickness mm		 Minimum percentage elongation after fracture
a
%Nominal thickness mm (L₀=5,65√S₀)
Steel name Steel number ≤ 16 > 16 ≤ 40 > 40 ≤ 63 > 63 ≤ 80 > 80 ≤ 100 > 100 ≤ 150 > 150 ≤ 200 > 200 ≤ 250 ≤ 100 > 100 ≤ 200 > 200 ≤ 250 ≤ 16 > 16 ≤ 40 > 40 ≤ 63 > 63 ≤ 80 > 80 ≤ 200 > 200 ≤ 250
S275N 1.0490 275 265 255 245 235 225 215 205 370 to 510 350 to 480 350 to 480 24 24 24 23 23 23
S275NL 1.0491
S355N 1.0545 355 345 335 325 315 295 285 275 470 to 630 450 to 600 450 to 600 22 22 22 21 21 21
S355NL 1.0546
S420N 1.8902 420 400 390 380 360 340 330 320 520 to 680 500 to 650 500 to 650 19 19 19 18 18 18
S420NL 1.8912
S460N 1.8901 460 440 430 410 400 380 370 370 540 to 720 530 to 710 510 to 690 17 17 17 17 17 16
S460NL 1.8903
aFor plate, strip and wide flats with widths ≥ 600 mm the direction transverse (t) to the rolling direction applies. For all other products the values apply for the direction parallel (l) to the rolling direction.
Table 5 - Mechanical properties - Impact energy KV₂ on longitudinal test pieces a
Designation Minimum values of impact energy KV₂ in J at test temperatures, in °C
Steel name Steel number +20 0 -10 -20 -30 -40 -50
S275N 1.0490 55 47 43 40b - - -
S355N 1.0545
S420N 1.8902
S460N 1.8901
S275NL 1.0491 63 55 51 47 40 31 27
S355NL 1.0546
S420NL 1.8912
S460NL 1.8903
For subsized specimens the minimum values shall be reduced in direct proportion to the cross-sectional area of the test piece.
a Exceptions due to product size restrictions, see 9.2.3.3.
b This value corresponds with 27 J at - 30°C (see EN 1993-1-10).
Table 6 - Mechanical properties - Impact energy KV₂ on transverse test pieces a (see Option 30)
Designation Minimum values of impact energy KV₂ in J at test temperatures, in °C
Steel name Steel number +20 0 -10 -20 -30 -40 -50
S275N 1.0490 31 27 24 20 - - -
S355N 1.0545
S420N 1.8902
S460N 1.8901
S275NL 1.0491 40 34 30 27 23 20 16
S355NL 1.0546
S420NL 1.8912
S460NL 1.8903
For subsized specimens the minimum values shall be reduced in direct proportion to the cross-sectional area of the test piece.
aExceptions due to product size restrictions see 9.2.3.3

7.4 Technological properties

7.4.1 Weldability

The steels specified in this document shall be suitable for welding.

General requirements for arc welding of the steels specified in this document shall be as given in EN 1011-2.

NOTE With increasing product thickness and strength level, cold cracking can occur. Cold cracking is caused by the following factors in combination:

  • the amount of diffusible hydrogen in the weld metal;
  • a brittle structure of the heat affected zone;
  • significant tensile stress concentrations in the welded joint.

7.4.2 Formability and flame straightening

7.4.2.1 General

Recommendations regarding hot forming, cold forming and flame straightening are laid out in CEN/TR 10347.

7.4.2.2 Hot forming

The products shall comply with the requirements of Tables 4 to 6 if hot forming is carried out after delivery (see 7.3.1.2).

7.4.2.3 Cold formability
7.4.2.3.1 General

NOTE Cold forming leads to reduction in the ductility. Furthermore it is necessary to draw the attention to the risk of brittle fracture in connection with hot‑dip zinc‑coating.

7.4.2.3.2 Flangeability

If specified at the time of the order plate, sheet, strip and wide flats with a nominal thickness ≤ 16 mm shall be suitable for flanging without cracking with the following minimum bend radii:

See Option 11, Clause 13 (Flangeability without cracking).

7.4.2.3.3 Roll forming

If specified at the time of the order plate, sheet and strip with a nominal thickness ≤ 8 mm shall be suitable for the production of sections by cold rolling (for example according to EN 10162), with the same minimum bend radii as given in 7.4.2.3.2.

See Option 12, Clause 13 (Roll forming for flat products).

NOTE The products suitable for roll forming are also suitable for the manufacture of cold‑finished square and rectangular hollow sections.

7.4.3 Hot‑dip zinc‑coating

EN ISO 1461 should be used to specify coating requirements. EN ISO 14713-2 provides further guidance, including information on the influence of various factors, including steel chemical composition, on the coating formation.

Option 5, Clause 13, can be used to order steels with a chemical composition required for hot‑dip zinc coating. When option 5 is implemented, the purchaser and manufacturer shall agree to a steel composition (heat analysis) of silicon and phosphorous according to either Category A (or steels satisfying the formula Si ≤ 0.03 % and Si + 2,5P ≤ 0.09 %) or Category B (limited to 0.14 % ≤ Si ≤ 0.25 %) or Category D (limited to 0.25 % < Si ≤ 0.35 %) with required values as cited by the ranges given in EN ISO 14713-2:2009, Table 1, column 2.

NOTE EN ISO 14713-2:2009, Table 1, gives guidance on typical coating characteristics associated with certain steel compositions on the basis of the surface composition of silicon and phosphorous.

The maximum carbon equivalent shall be increased by 0,02 or by 0,01 (see 7.2.4).

See Option 5, Clause 13 (Chemical composition for hot dip zinc coating).

7.5 Surface properties

7.5.1 Strip

The surface condition should not impair an application appropriate to the steel grade if adequate processing of the strip is applied.

7.5.2 Plates and wide flats

EN 10163‑1 and EN 10163‑2 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding. Class A, subclass 1 of EN 10163‑2 shall apply. Class B regarding grinding or subclasses 2 or 3 regarding repair by welding can be agreed upon at the time of the order.

See Option 15, Clause 13 (Other surface class for plates and wide flats).

7.5.3 Sections

EN 10163‑1 and EN 10163‑3 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding. Class C, subclass 1 of EN 10163‑3 shall apply. Class D regarding grinding or subclasses 2 or 3 regarding repair by welding can be agreed upon at the time of the order.

See Option 16, Clause 13 (Other surface class for sections).

7.5.4 Bars and rods

EN ISO 9443 applies for the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding. Class A of EN ISO 9443 shall apply, unless otherwise agreed upon at the time of the order.

See Option 17, Clause 13 (Other surface class for bars and rods).

7.6 Internal soundness

Ultrasonic testing may be agreed upon at the time of the order and shall comply with 10.3.

See Option 6, Clause 13 (Ultrasonic testing for flat products).

See Option 7, Clause 13 (Ultrasonic testing for H beams with parallel flanges and IPE beams).

See Option 8, Clause 13 (Ultrasonic testing for bars).

7.7 Dimensions, tolerances on dimensions and shape, mass

7.7.1 Dimensions, tolerances on dimensions and shape shall be in accordance with the requirements given in the order by reference to the following standards: EN 10017, EN 10024, EN 10029, EN 10034, EN 10048, EN 10051, EN 10055, EN 10056‑1, EN 10056‑2, EN 10058, EN 10059, EN 10060, EN 10061, EN 10067, EN 10279, EN 10363 and EN 10365.

For hot rolled plate tolerances, the basic requirements shall be in accordance with EN 10029, including thickness tolerances to class A, unless otherwise agreed upon at the time of the order.

See Option 18, Clause 13 (For plates other thickness tolerance than class A).

For plates cut from continuously hot rolled strip, the thickness tolerances shall be in accordance with EN 10051, unless otherwise agreed upon at the time of the order.

See Option 34, Clause 13 (For plates cut from strip thickness tolerances according to EN 10029).

7.7.2 The nominal mass shall be determined from the nominal dimensions using a volumetric mass of 7 850 kg/m³.

8 Inspection

8.1 Type of inspection and inspection document

The products shall be delivered with specific inspection and testing to indicate compliance with the order and this document. The manufacturer shall obtain from the purchaser which of the inspection documents specified in EN 10204 is required.

NOTE Some application standards, e.g. EN 1090‑2, require particular inspection documents according to EN 10204.

Unless otherwise agreed upon steel grades of this standard are delivered with CE marking and they shall not only fulfil these technical delivery conditions but also the requirements of EN 10025‑1.

It can be agreed upon at the time of enquiry and order to abstain from CE‑marking, see Option 33, Clause 13, in this case EN 10025‑1 does not apply.

See Option 33, Clause 13 (no application of CE‑marking).

8.2 Content of inspection document

The inspection document shall include, in accordance with EN 10168, the following codes and/or information, where applicable:

CodeDescription
Acommercial transactions and parties involved;
Bdescription of products to which the inspection document applies;
C00‑C03identification of the sample, location of the sample, direction of the test pieces, test temperature;
C10‑C13shape of the test piece, yield or proof strength, tensile strength, elongation after fracture;
C40‑C43type of test piece, width of test piece, individual values, mean value;
C70‑C92steelmaking process, chemical composition;
Dother tests;
Zvalidation.

8.3 Tests to be carried out

8.3.1 The following tests shall be carried out:

8.3.2 At the time of the order the following additional tests can be agreed upon (see also Clause 13):

9 Frequency of testing and preparation of samples and test pieces

9.1 Frequency of testing

9.1.1 Chemical analysis

The heat analysis shall be determined once per cast. If a product analysis has been agreed upon at the time of enquiry and order, the purchaser shall specify the frequency if not once per cast.

9.1.2 Mechanical tests

The verification of the mechanical properties (tensile strength, yield strength, impact energy and elongation) shall be by test unit(s) from within each cast.

For verifying the mechanical properties the following test unit shall apply:

The test unit shall contain products of the same form, grade and quality and of the same thickness range as specified in Table 4 for the yield strength.

The following samples shall be taken from one sample product of each test unit:

9.2 Preparation of samples and test pieces

9.2.1 Selection and preparation of samples for chemical analysis

The selection and preparation of samples for product analysis shall be in accordance with EN ISO 14284.

9.2.2 Location of samples and orientation of test pieces for mechanical tests

The samples shall be taken from any product of the test unit, from the location in the product as shown in Annex A.

Additionally for plates, sheet, wide strip and wide flats the samples shall be taken so that the axes of the test pieces are approximately midway between the edge and centre line of the products.

For wide strip and rod the sample shall be taken at an adequate distance from the end of the product.

For narrow strip (< 600 mm wide) the sample shall be taken at an adequate distance from the end of the coil and at one third of the width.

9.2.3 Preparation of test pieces for mechanical tests

9.2.3.1 General

The requirements of EN ISO 377 shall apply.

9.2.3.2 Preparation of tensile test pieces

The requirements of EN ISO 6892‑1 shall apply.

For flat products of nominal thickness > 30 mm a round test piece may be used with the longitudinal axis at ¼ thickness, if a testing machine with an adequate capacity is not available. In case of doubt or dispute, results on full thickness of the product will prevail.

NOTE For bars round test pieces are commonly used but other forms are not prohibited (see EN ISO 6892‑1).

9.2.3.3 Preparation of impact test pieces

V‑notch test pieces shall be machined and prepared in accordance with EN ISO 148‑1. In addition the following requirements apply:

9.3 Identification of samples and test pieces

Samples and test pieces shall be marked so that the original products and their location and orientation in the product are known.

10 Test methods

10.1 Chemical analysis

Test methods shall be in accordance with EN 10315, EN ISO 15350 or CR 10320 depending on the elements to be analysed and their content. The choice of a suitable physical or chemical analytical method for the analysis shall be at the discretion of the manufacturer. In case of dispute, the method used shall be agreed upon taking into account CEN/TR 10261.

For the heat analysis the manufacturer shall report values of all elements defined in Table 1 for the steel grade concerned for each cast as well as of the elements for determining the carbon equivalent value.

For the product analysis, if not otherwise agreed upon, the manufacturer shall report values of all elements defined in Table 2 for the steel grade concerned, see Option 2, Clause 13.

10.2 Mechanical tests

10.2.1 Tensile test

The tensile test shall be carried out in accordance with EN ISO 6892‑1. The manufacturer may choose between method A or B specified in EN ISO 6892‑1 for the tensile test.

For the specified yield strength the upper yield strength (ReH) shall be determined.

If a yield phenomenon is not present, the 0.2% proof strength (Rp0,2) shall be determined.

Test pieces may be non‑proportional but in cases of dispute proportional test pieces having a gauge length L0 = 5,65√S0 shall be used.

For flat products with a nominal thickness < 3 mm the test pieces shall always have a gauge length L0 = 80 mm and a width of 20 mm (test piece number 2 EN ISO 6892‑1:2016, Annex B).

For normal testing, for reasons of economy, test pieces of a constant measuring length may be used provided the result obtained for elongation after fracture is converted by the formula in EN ISO 2566‑1.

10.2.2 Impact test

The impact test shall be carried out in accordance with EN ISO 148‑1 on V‑notch specimen using 2 mm striker.

The average value of the three test results shall meet the specified requirement. One individual value may be below the minimum average value specified, provided that it is not less than 70% of that value.

Three additional test pieces shall be taken from the same sample in accordance with 9.1.2 and tested in any one of the following cases:

The average value of the six tests shall be not less than the minimum average value specified. Not more than two of the individual values may be lower than the minimum average value specified and not more than one may be lower than 70% of this value.

10.3 Ultrasonic testing

If specified at the time of the order (see 7.6) ultrasonic testing shall be carried out:

10.4 Retests

The retests shall be in accordance with EN 10021.

In the case of strip and rod, retests on a rejected coil shall be carried out after the cutting of an additional longitudinal section of sufficient length to remove the coil end effect with a maximum of 20 m.

11 Marking, labelling, packaging

11.1 The products shall be legibly marked using methods such as painting, stamping, laser marking, bar coding, durable adhesive labels or attached tags with the following:

The type of marking may be specified at the time of the order.

See Option 10, Clause 13 (special type of marking).

NOTE 1 Where the option for hot dip galvanizing is chosen (see Clause 13), the marking methods and materials used can be agreed upon in order to avoid interference with preparation for hot dip galvanizing (see EN ISO 14713‑2).

The mark of the external inspection representative may be marked (where applicable).

NOTE 2 This depends on the type of inspection document (see 8.1).

In addition if specified at the time of the order there shall be either no die stamping or only die stamping in positions indicated by the purchaser.

See Option 31, Clause 13 (Die stamping not allowed or at special position).

11.2 Marking shall be at a position close to one end of each product or on the end cut face at the manufacturer's discretion.

11.3 Where products are supplied in securely tied bundles the marking shall be on a label attached to the bundle or on the top product of the bundle.

12 Complaints

Any complaints shall be dealt with in accordance with EN 10021.

13 Options

A list of options for parts 2 to 6 is given in Annex B for information. The following options (see 5.2) apply for this part:

  1. 1 The steel making process shall be indicated (see 6.1).
  2. 2 Product analysis shall be carried out; the number of samples shall be as agreed upon (see 7.2.2 and 9.1.1).
  3. 4 Products shall comply with one of the improved properties perpendicular to the surface of EN 10164 (see 7.3.3).
  4. 5 The product shall have a chemical composition required for hot‑dip zinc‑coating (see 7.4.3).
  5. 6 For flat products in nominal thickness ≥ 6 mm, except for hot rolled strip and plate cut from strip, the freedom from internal defects shall be verified in accordance with EN 10160 (see 7.6 and 10.3).
  6. 7 For H beams with parallel flanges and IPE beams the freedom from internal defects shall be verified in accordance with EN 10306 (see 7.6 and 10.3).
  7. 8 For bars the freedom from internal defects shall be verified in accordance with EN 10308 (see 7.6 and 10.3).
  8. 10 The type of marking required (see Clause 11).
  9. 11 Sheet, plate, strip and wide flats with a nominal thickness ≤ 16 mm shall be suitable for flanging without cracking (see 7.4.2.3.2).
  10. 12 Plate, sheet and strip with nominal thickness ≤ 8 mm shall be suitable for the production of sections by cold rolling with bend radii given in 7.4.2.3.2 (see 7.4.2.3.3).
  11. 13 For flat products out of each parent plate or coil the impact properties only shall be verified (see 7.3.2.4).
  12. 14 For flat products out of each parent plate or coil the impact properties and the tensile properties shall be verified (see 7.3.2.4).
  13. 15 For plates and wide flats the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class A, subclass 1 of EN 10163‑2 applies (see 7.5.2).
  14. 16 For sections the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class C, subclass 1 of EN 10163‑3 applies (see 7.5.3).
  15. 17 For bars and rods the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class A of EN ISO 9443 applies (see 7.5.4).
  16. 18 For hot rolled plates other tolerances than class A of EN 10029 apply (see 7.7.1).
  17. 24 At which temperature the impact properties shall be verified (see 7.3.2.2 and 8.3.2).
  18. 30 The impact properties shall be verified on transverse V‑notch test pieces (see 7.3.2.3 and 8.3.2).
  19. 31 Die stamping is not allowed or the position for die stamping shall be as indicated by the purchaser (see Clause 11).
  20. 32 For some applications, e.g. for railways, a maximum S content of 0.010% for heat analysis and 0.012% for product analysis is required (see Tables 1 and 2, footnote b).
  21. 33 No application of CE‑marking according to EN 10025‑1, Annex ZA, and no application of assessment and verification of constancy of performance according to EN 10025‑1, for products, which are not covered by the Construction Product Regulation.
  22. 34 For plates cut from continuously hot rolled strip thickness tolerances according to EN 10029 apply (see 7.7.1).

Annex A (normative) Locations of samples and test pieces

Figure A.1 — Beams, channels, angles, T sections and Z sections

Figure A.1 — Beams, channels, angles, T sections and Z sections

Key: 1 Location of the sample (s) in respect to the edge (s) of the product. c) a) Usually the samples shall be taken from the flange location b) By agreement at the time of the order, the sample may be taken from the web, at a quarter of the total height c) Test pieces shall be taken from the sample in respect to the surface of the product as indicated in Figure A.3. Footnote d) of Figure A.3 does not apply for products covered by Figure A.1. For sections with inclined flanges, machining of the inclined surface shall be permitted in order to make it parallel to the other surface.

Figure A.2 — Bars and rod

Figure A.2 — Bars and rod

Figure A.3 — Flat products

Figure A.3 — Flat products

Annex B (informative) List of Options of EN 10025‑2 to ‑6

(The actual content of Annex B is not provided in the text. Refer to the standard.)

Bibliography

[1] EN 1090‑2, Execution of steel structures and aluminium structures – Part 2: Technical requirements for steel structures
[2] EN 1993‑1‑10, Eurocode 3: Design of steel structures – Part 1‑10: Material toughness and through‑thickness properties
[3] EN 10162, Cold rolled steel sections – Technical delivery conditions – Dimensional and cross‑sectional tolerances
[4] CEN/TR 10261, Iron and steel – European standards for the determination of chemical composition
[5] EN ISO 643, Steels – Micrographic determination of the apparent grain size (ISO 643)
[6] EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods (ISO 1461)

13 Options

A list of options for parts 2 to 6 is given in Annex B for information. The following options (see 5.2) apply for this part:

  1. 1 The steel making process shall be indicated (see 6.1).
  2. 2 Product analysis shall be carried out; the number of samples shall be as agreed upon (see 7.2.2 and 9.1.1).
  3. 4 Products shall comply with one of the improved properties perpendicular to the surface of EN 10164 (see 7.3.3).
  4. 5 The product shall have a chemical composition required for hot‑dip zinc‑coating (see 7.4.3).
  5. 6 For flat products in nominal thickness ≥ 6 mm, except for hot rolled strip and plate cut from strip, the freedom from internal defects shall be verified in accordance with EN 10160 (see 7.6 and 10.3).
  6. 7 For H beams with parallel flanges and IPE beams the freedom from internal defects shall be verified in accordance with EN 10306 (see 7.6 and 10.3).
  7. 8 For bars the freedom from internal defects shall be verified in accordance with EN 10308 (see 7.6 and 10.3).
  8. 10 The type of marking required (see Clause 11).
  9. 11 Sheet, plate, strip and wide flats with a nominal thickness ≤ 16 mm shall be suitable for flanging without cracking (see 7.4.2.3.2).
  10. 12 Plate, sheet and strip with nominal thickness ≤ 8 mm shall be suitable for the production of sections by cold rolling with bend radii given in 7.4.2.3.2 (see 7.4.2.3.3).
  11. 13 For flat products out of each parent plate or coil the impact properties only shall be verified (see 7.3.2.4).
  12. 14 For flat products out of each parent plate or coil the impact properties and the tensile properties shall be verified (see 7.3.2.4).
  13. 15 For plates and wide flats the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class A, subclass 1 of EN 10163‑2 applies (see 7.5.2).
  14. 16 For sections the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class C, subclass 1 of EN 10163‑3 applies (see 7.5.3).
  15. 17 For bars and rods the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding another class than class A of EN ISO 9443 applies (see 7.5.4).
  16. 18 For hot rolled plates other tolerances than class A of EN 10029 apply (see 7.7.1).
  17. 24 At which temperature the impact properties shall be verified (see 7.3.2.2 and 8.3.2).
  18. 30 The impact properties shall be verified on transverse V‑notch test pieces (see 7.3.2.3 and 8.3.2).
  19. 31 Die stamping is not allowed or the position for die stamping shall be as indicated by the purchaser (see Clause 11).
  20. 32 For some applications, e.g. for railways, a maximum S content of 0.010% for heat analysis and 0.012% for product analysis is required (see Tables 1 and 2, footnote b).
  21. 33 No application of CE‑marking according to EN 10025‑1, Annex ZA, and no application of assessment and verification of constancy of performance according to EN 10025‑1, for products, which are not covered by the Construction Product Regulation.
  22. 34 For plates cut from continuously hot rolled strip thickness tolerances according to EN 10029 apply (see 7.7.1).

Annex A (normative) Locations of samples and test pieces

Figure A.1

Figure A.1 — Beams, channels, angles, T sections and Z sections

Key: 1 Location of the sample(s) in respect to the edge(s) of the product. c) a) Usually the samples shall be taken from the flange location b) By agreement at the time of the order, the sample may be taken from the web, at a quarter of the total height c) Test pieces shall be taken from the sample in respect to the surface of the product as indicated in Figure A.3. Footnote d) of Figure A.3 does not apply for products covered by Figure A.1. For sections with inclined flanges, machining of the inclined surface shall be permitted in order to make it parallel to the other surface.

Figure A.2

Figure A.2 — Bars and rod

Figure A.3

Figure A.3 — Flat products

Annex B (informative) List of Options of EN 10025‑2 to ‑6

Table B.1 - List of Options in EN 10025-2 to -6
Number of Option Options Part 2 Part 3 Part 4 Part 5 Part 6
1 Details of manufacturing process X X X X X
2 Product analysis X X X X X
3 Verification of impact properties
Part 2: for qualities JR
Part 5: for qualities S355 class WP		 X - - X X
4 Deformation properties perpendicular to the surface X X X X X
5 Chemical composition for hot dip zinc coating X X X - X
6 Ultrasonic testing for flat products X X X X X
7 Ultrasonic testing for sections X X X X -
8 Ultrasonic testing for bars X X X X -
10 Special type of marking X X X X X
11 Flangeability without cracking
Part 2: nominal thickness ≤ 30 mm
Part 3: nominal thickness ≤ 16 mm
Part 4: nominal thickness ≤ 12 mm
Part 5: nominal thickness ≤ 20 mm
Part 6: nominal thickness ≤ 16 mm		 X X X X X
12 Roll forming of flat products X X X - -
13 For flat products out of each parent plate or coil impact properties only to be verified.
Part 2: for qualities J2 and K2
Part 3 and 4: for all qualities
Part 5: for qualities J2, J4, J5 and K2
Part 6: for each heat treatment unit and for all qualities		 X X X X X
14 For flat products out of each parent plate or coil impact and tensile properties to be verified.
Part 2: for qualities J2 and K2
Part 3 and 4: for all qualities
Part 5: for qualities J2, J4, J5 and K2
Part 6: for each heat treatment unit and for all qualities		 X X X X X
15 Other surface class for plates and wide flats X X X X X
16 Other surface class for sections X X X X -
17 Other surface class for bars and rods X X X X -
18 For plates other thickness tolerance than class A (EN 10029) X X X X X
19 Special delivery condition:
Part 2: +AR, +N or +M for long products and strip, +AR, +N for quarto plates
Part 5: +AR, +N, +M		 X - - X -
20 Cu alloyed X - - - -
22 Drawing of bars X - - - -
23 Certificate of compliance for S185 X - - - -
24 Agreement on another impact test temperature - X X - X
25 Sample preparation for semi-finished products X - - - -
26 Max. Carbon for sections thickness > 100 mm X - - - -
27 Higher S-content for better machinability X - - - -
28 Min. impact values for sections thickness > 100 mm X - - - -
30 Impact properties verified on transverse test pieces - X X - X
31 Die stamping not allowed or at special position - X X - X
32 Max. S-content - X X - -
33 No application of CE-marking X X X X X
34 For plates cut from strip thickness tolerances according to EN 10029 X X X X X

Bibliography

[1] EN 1090-2, Execution of steel structures and aluminium structures – Part 2: Technical requirements for steel structures
[2] EN 1993-1-10, Eurocode 3: Design of steel structures – Part 1-10: Material toughness and through‑thickness properties
[3] EN 10162, Cold rolled steel sections – Technical delivery conditions – Dimensional and cross‑sectional tolerances
[4] CEN/TR 10261, Iron and steel – European standards for the determination of chemical composition
[5] EN ISO 643, Steels – Micrographic determination of the apparent grain size (ISO 643)
[6] EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods (ISO 1461)

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