Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels

Part 4 of this document, in addition to Part 1, specifies requirements for flat and long products of hot rolled weldable fine grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables 2 to 4 (chemical composition) and Tables 5 to 7 (mechanical properties) in thickness £ 120 mm for flat products and in thickness £ 150 mm for long products.
In addition to EN 10025-1 the steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and low temperatures.

Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle

Teil 4 dieses Dokumentes legt  zusätzlich zu Teil 1  die technischen Lieferbedingungen fest für Flach- und Langerzeugnisse aus schweißgeeigneten Feinkornbaustählen im thermomechanisch gewalzten Lieferzustand in den Sorten und Gütegruppen nach den Tabellen 2 bis 4 (chemische Zusammensetzung) und den Tabellen 5 bis 7 (mechanische Eigenschaften) in Dicken  120 mm für Flacherzeugnisse und in Dicken  150 mm für Langer-zeugnisse.
Zusätzlich zu EN 10025-1 sind die in diesem Dokument erfassten Stähle vorwiegend für die Verwendung in hochbeanspruchten geschweißten Bauteilen, z. B. Brücken, Schleusentore, Lagerbehälter, Wassertanks usw. bei Umgebungstemperatur und niedrigen Temperaturen bestimmt.

Produits laminés à chaud en aciers de construction - Partie 4: Conditions techniques de livraison pour les aciers de construction soudables à grains fins obtenus par laminage thermomécanique

Vroče valjani izdelki iz konstrukcijskih jekel – 4. del: Tehnični dobavni pogoji za termomehansko obdelana valjana variva drobnozrnata konstrukcijska jekla

General Information

Status
Withdrawn
Publication Date
09-Nov-2004
Withdrawal Date
13-Aug-2019
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
14-Aug-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steelsProduits laminés a chaud en aciers de construction - Partie 4: Conditions techniques de livraison pour les aciers de construction soudables a grains fins obtenus par laminage thermomécaniqueWarmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle77.140.50SROL]GHONLFlat steel products and semi-products77.140.10Jekla za toplotno obdelavoHeat-treatable steelsICS:SIST EN 10025-4:2004enTa slovenski standard je istoveten z:EN 10025-4:200401-december-2004SIST EN 10025-4:2004SLOVENSKI

STANDARDSIST EN 10113-1:19971DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10025-4

November 2004 ICS 77.140.10; 77.140.50 Supersedes EN 10113-1:1993, EN 10113-3:1993 English version

Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels

Produits laminés à chaud en aciers de construction -Partie 4: Conditions techniques de livraison pour les aciers de construction soudables à grains fins obtenus par laminage thermomécanique

Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle This European Standard was approved by CEN on 1 April 2004.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

B-1050 Brussels © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10025-4:2004: E

EN 10025-4:2004 (E) 2 Contents Page Foreword..............................................................................................................................................................4 1 Scope......................................................................................................................................................5 2 Normative references............................................................................................................................5 2.1 General standards.................................................................................................................................5 2.2 Standards on dimensions and tolerances (see 7.7.1)........................................................................6 2.3 Standards on testing.............................................................................................................................6 3 Terms and definitions...........................................................................................................................6 4 Classification and designation.............................................................................................................7 4.1 Classification..........................................................................................................................................7 4.1.1 Main quality classes..............................................................................................................................7 4.1.2 Grades and qualities.............................................................................................................................7 4.2 Designation............................................................................................................................................7 5 Information to be supplied by the purchaser.....................................................................................8 5.1 Mandatory information..........................................................................................................................8 5.2 Options...................................................................................................................................................8 6 Manufacturing process.........................................................................................................................8 6.1 Steel making process............................................................................................................................8 6.2 Grain structure.......................................................................................................................................8 6.3 Delivery conditions................................................................................................................................8 7 Requirements.........................................................................................................................................9 7.1 General....................................................................................................................................................9 7.2 Chemical composition..........................................................................................................................9 7.3 Mechanical properties...........................................................................................................................9 7.3.1 General....................................................................................................................................................9 7.3.2 Impact properties...................................................................................................................................9 7.3.3 Improved deformation properties perpendicular to the surface....................................................10 7.4 Technological properties....................................................................................................................10 7.4.1 Weldability............................................................................................................................................10 7.4.2 Formability............................................................................................................................................10 7.4.3 Suitability for hot-dip zinc-coating.....................................................................................................11 7.5 Surface properties...............................................................................................................................11 7.5.1 Strip.......................................................................................................................................................11 7.5.2 Plates and wide flats...........................................................................................................................11 7.5.3 Sections................................................................................................................................................12 7.5.4 Bars and rods.......................................................................................................................................12 7.6 Internal soundness..............................................................................................................................12 7.7 Dimensions, tolerances on dimensions and shape, mass..............................................................12 8 Inspection.............................................................................................................................................12 8.1 General..................................................................................................................................................12 8.2 Type of inspection and inspection document..................................................................................12 8.3 Frequency of testing...........................................................................................................................13 8.3.1 Sampling...............................................................................................................................................13 8.3.2 Test units..............................................................................................................................................13 8.3.3 Verification of chemical composition................................................................................................13 8.4 Tests to be carried out for specific inspection.................................................................................13 9 Preparation of samples and test pieces............................................................................................13 9.1 Selection and preparation of samples for chemical analysis.........................................................13 9.2 Location and orientation of samples and test pieces for mechanical tests..................................14 9.2.1 General..................................................................................................................................................14

EN 10025-4:2004 (E) 3 9.2.2 Preparation of samples.......................................................................................................................14 9.2.3 Preparation of test pieces...................................................................................................................14 9.2.4 Impact test pieces................................................................................................................................14 9.3 Identification of samples and test pieces.........................................................................................14 10 Test methods.......................................................................................................................................14 10.1 Chemical analysis................................................................................................................................14 10.2 Mechanical tests..................................................................................................................................14 10.3 Ultrasonic testing................................................................................................................................14 10.4 Retests..................................................................................................................................................14 11 Marking, labelling, packaging............................................................................................................15 12 Complaints...........................................................................................................................................15 13 Options (see 5.2)..................................................................................................................................15 Annex A (informative)

List of corresponding former designations..........................................................22 Annex B (informative)

List of national standards which correspond with EURONORMS referenced..23 Bibliography......................................................................................................................................................24

EN 10025-4:2004 (E) 4 Foreword This document (EN 10025-4:2004) has been prepared by Technical Committee ECISS/TC 10 “Structural steels - Grades and qualities”, the secretariat of which is held by NEN. 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes together with EN 10025-1:2004, EN 10113-1:1993, Hot-rolled products in weldable fine grain structural steels - Part 1: General delivery conditions and EN 10113-3:1993 Hot-rolled products in weldable fine grain structural steels - Part 3: Delivery conditions for thermomechanical rolled steels. The titles of the other parts of this document are: Part 1: General technical delivery conditions; Part 2: Technical delivery conditions for non-alloy structural steels; Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels; Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance; Part 6: Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition. This document has been prepared under Mandate M/120 given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of the EU Construction Products Directive (89/106/EEC). For relationship with the EU Construction Products Directive, see informative Annex ZA of EN 10025-1:2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

EN 10025-4:2004 (E) 5 1 Scope Part 4 of this document, in addition to Part 1, specifies requirements for flat and long products of hot rolled weldable fine grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables 2 to 4 (chemical composition) and Tables 5 to 7 (mechanical properties) in thickness ≤ 120 mm for flat products and in thickness ≤ 150 mm for long products. In addition to EN 10025-1 the steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and low temperatures. 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. 2.1 General standards EN 1011-2, Welding – Recommendations for welding of metallic materials - Part 2: Arc welding of ferritic steels. EN 10020, Definition and classification of grades of steel. EN 10025-1:2004, Hot rolled products of structural steels - Part 1: General technical delivery conditions. EN 10027-1, Designation systems for steels - Part 1: Steel names, principal symbols. EN 10027-2, Designation systems for steels - Part 2: Numerical system. EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 1: General requirements. EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 2: Plates and wide flats. EN 10163-3, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 3: Sections. EN 10164, Steel products with improved deformation properties perpendicular to the surface of the product - Technical delivery conditions. EN 10221, Surface quality classes for hot-rolled bars and rods - Technical delivery conditions. CR 10260, Designation systems for steels - Additional symbols.

EN 10025-4:2004 (E) 6 2.2 Standards on dimensions and tolerances (see 7.7.1) EN 10017, Non-alloy steel rod for drawing and/or cold rolling – Dimensions and tolerances. EN 10024, Hot rolled taper flange I sections - Tolerances on shape and dimensions. EN 10029, Hot rolled steel plates 3 mm thick or above - Tolerances on dimensions, shape and mass. EN 10034, Structural steel I and H sections - Tolerances on shape and dimensions. EN 10048, Hot rolled narrow steel strip - Tolerances on dimensions and shape. EN 10051, Continuously hot-rolled uncoated plate, sheet and strip of non-alloy and alloy steels - Tolerances on dimensions and shape. EN 10055, Hot-rolled steel equal flange tees with radiused root and toes - Dimensions and tolerances on shape and dimensions. EN 10056-1, Structural steel equal and unequal leg angles - Part 1: Dimensions. EN 10056-2, Structural steel equal and unequal leg angles - Part 2: Tolerances on shape and dimensions. EN 10058, Hot rolled flat steel bars for general purposes - Dimensions and tolerances on shape and dimensions. EN 10059, Hot rolled square steel bars for general purposes - Dimensions and tolerances on shape and dimensions. EN 10060, Hot rolled round steel bars for general purposes - Dimensions and tolerances on shape and dimensions. EN 10061, Hot rolled hexagon steel bars for general purposes - Dimensions and tolerances on shape and dimensions. EN 10067, Hot rolled bulb flats - Dimensions and tolerances on shape, dimensions and mass. EN 10162, Cold rolled steel sections - Technical delivery conditions - Dimensional and cross-sectional tolerances. EN 10279, Hot rolled steel channels - Tolerances on shape and dimensions. 2.3 Standards on testing EN 10160, Ultrasonic testing of steel flat product of thickness equal to or greater than 6 mm (reflection method). EN 10306, Iron and steel - Ultrasonic testing of H beams with parallel flanges and IPE beams. EN 10308, Non-destructive testing - Ultrasonic testing of steel bars. EN ISO 643, Steels – Micrographic determination of the apparent grain size (ISO 643:2003). 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10025-1:2004 and the following apply.

EN 10025-4:2004 (E) 7 3.1 thermomechanical rolling rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone NOTE 1 Subsequent heating above 580 °C may lower the strength values. If temperatures above 580 °C are needed reference should be made to the supplier. NOTE 2 Thermomechanical rolling leading to the delivery condition M can include processes with an increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and quenching and tempering. NOTE 3 In some publications the word TMCP (Thermomechanical Control Process) is also used. 3.2 fine grained steels steels with fine grain structure with an equivalent index of ferritic grain size ≥ 6 determined in accordance with EN ISO 643 4 Classification and designation 4.1 Classification 4.1.1 Main quality classes All steel grades 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 enquiry and order: − with specified minimum values of impact energy at temperatures not lower than -20 °C, designated as M; − with specified minimum values of impact energy at temperatures not lower than -50 °C, designated as ML. 4.2 Designation 4.2.1 The designation shall be in accordance with EN 10025-1. NOTE For a list of corresponding former designations and the former designations from EN 10113-3:1993 see Annex A, Table A.1. 4.2.2 The designation shall consist of: − number of this document (EN 10025-4); − steel name or the steel number; the steel name consisting of: − symbol S (for structural steel); − indication of the minimum specified yield strength for thickness ≤ 16 mm expressed in MPa1);

1) 1 MPa = 1 N/mm2.

EN 10025-4:2004 (E) 8 − delivery condition M; − capital letter L for the quality with specified minimum values of impact energy at temperatures not lower than -50 °C. EXAMPLE Thermomechanical rolled structural steel (S) with a specified minimum yield strength at ambient temperature of 355 MPa1), and with a specified minimum value of impact energy at -50 ºC:

Steel EN 10025-4 - S355ML

Steel EN 10025-4 - 1.8834 5 Information to be supplied by the purchaser 5.1 Mandatory information The information that shall be supplied by the purchaser at the time of the order is specified in EN 10025-1. In addition to EN 10025-1 the following information shall be supplied by the purchaser at the time of the order: g) the type of inspection document (see 8.2). 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. 6 Manufacturing process 6.1 Steel making process The steel making process shall be in accordance with EN 10025-1. If specified at the time of the order the steel making process shall be reported to the purchaser. See option 1. 6.2 Grain structure The steels shall have a fine grain structure containing sufficient amounts of nitrogen binding elements (see

Table 2). 6.3 Delivery conditions The products shall be supplied in the thermomechanical rolled condition as defined in Clause 3.

EN 10025-4:2004 (E) 9 7 Requirements 7.1 General The following requirements apply when sampling, preparation of test pieces and testing specified in Clauses 8, 9 and 10 are carried out. 7.2 Chemical composition 7.2.1 The chemical composition determined by ladle analysis shall comply with the specified values of Table 2. On special request of the purchaser the manufacturer shall inform the purchaser at the time of the enquiry and order which of the alloying elements appropriate to the steel grade required will be deliberately added to the material to be delivered. See option 29. 7.2.2 The upper limits applicable for the product analysis are given in Table 3. The manufacturer shall inform the purchaser at the time of the enquiry and order which of the alloying elements appropriate to the steel grade required will be deliberately added to the material to be delivered. The product analysis shall be carried out when specified at the time of the order. See option 2. 7.2.3 The maximum carbon equivalent values based on the ladle analysis, given in Table 4 shall apply. For the carbon equivalent value formula see 7.2.3 of EN 10025-1:2004. 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 4 shall be increased as follows: − for Si ≤ 0,030 %, increase CEV by 0,02 %; − for Si ≤ 0,25 %, increase CEV by 0,01 %. 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 the mechanical properties shall comply with the values given in Tables 5 to 7. 7.3.1.2 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 of EN 10025-1:2004). 7.3.2 Impact properties 7.3.2.1 The verification of the impact energy value shall be carried out in accordance with EN 10025-1. Furthermore the verification of the impact energy value shall be carried out, unless otherwise agreed (see 7.3.2.2 and 7.3.2.3) with longitudinal test pieces for: − M at -20 ºC; − ML at -50 ºC.

EN 10025-4:2004 (E) 10 7.3.2.2 Another temperature (given in Tables 6 and 7) may be agreed at the time of the order. See option 3. 7.3.2.3 If agreed at the time of the enquiry and order transverse impact energy values as given in Table 7 shall apply instead of longitudinal values. See option 30. 7.3.3 Improved deformation properties perpendicular to the surface If agreed at the time of the order flat and long products shall comply with one of the requirements of EN 10164. See option 4. 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 NOTE Recommendations regarding hot and cold forming are laid down in ECSC IC 2. 7.4.2.1 Hot forming Hot forming shall not be undertaken. NOTE The products ordered and supplied in the thermomechanical rolled condition are not suitable for hot forming. 7.4.2.2 Cold formability 7.4.2.2.1 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. 7.4.2.2.2 Flangeability If specified at the time of the order plate, sheet, strip and wide flats ordered and supplied in the thermomechanical rolled condition with a nominal thickness ≤ 12 mm shall be suitable for flanging without cracking with the following minimum bend radii: − 2 times the nominal thickness with the axis of the bend in transverse direction and 2,5 times the nominal thickness in longitudinal direction for the steel grades S275 and S355;

EN 10025-4:2004 (E) 11 − 4 times the nominal thickness with the axis of the bend in transverse direction and 5 times the nominal thickness in longitudinal direction for the steel grades S420 and S460. See option 11b. 7.4.2.2.3 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 7.4.2.2.1. See option 12. NOTE The products suitable for roll forming are also suitable for the manufacture of cold-finished square and rectangular hollow sections. 7.4.3 Suitability for hot-dip zinc-coating Hot-dip zinc-coating requirements shall be agreed between manufacturer and purchaser.

EN ISO 1461 and EN ISO 14713 should be used to set these coating requirements. The definition of suitability classes based upon chemical analysis limitations as laid down in Table 1 can be used for guidance purposes. Table 1 - Classes for the suitability for hot-dip zinc-coating based on the ladle analysis (for guidance) Classes Elements % by mass

Si Si + 2,5 P P Class 1 ≤ 0,030 ≤ 0,090 - Class 2 a ≤ 0,35 - - Class 3 0,14 ≤ Si ≤ 0,25 - ≤ 0,035 a Class 2 applies only for special zinc alloys. For class 1 the maximum carbon equivalent value of Table 4 shall be increased by 0,02. For class 3 the maximum carbon equivalent value of Table 4 shall be increased by 0,01 (see 7.2.4). See option 5. NOTE Product shape, composition of the zinc bath, other hot-dip treatment settings and other factors should be considered when agreeing upon hot-dip zinc-coating requirements. 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 parts 1 and 2 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding. 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 at the time of the order.

EN 10025-4:2004 (E) 12 See option 15. 7.5.3 Sections EN 10163 parts 1 and 3 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding. 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 at the time of the order. See option 16. 7.5.4 Bars and rods EN 10221 applies for the permissible surface discontinuities and for the repair of surface defects by grinding. Class A of EN 10221 shall apply, unless otherwise agreed at the time of the order. See option 17. 7.6 Internal soundness The permissible level of internal imperfections shall be in accordance with EN 10025-1. See option 6 (for flat products). See option 7 (for H beams with parallel flanges and IPE beams). See option 8 (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 relevant documents according to 2.2 and according to 2.2 and 7.7.1 of EN 10025-1:2004. For hot rolled plate tolerances the basic requirements shall be in accordance with EN 10029, including thickness tolerances to class A, unless otherwise agreed at the time of the or

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