EN 10028-6:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SREROMãDQDFlacherzeugnisse aus Druckbehälterstählen - Teil 6: Schweißgeeignete Feinkornbaustähle, vergütetProduits plats en acier pour appareils à pression - Partie 6: Aciers soudables à grains fins, trempés et revenusFlat products made of steels for pressure purposes - Part 6: Weldable fine grain steels, quenched and tempered77.140.50SROL]GHONLFlat steel products and semi-products77.140.30Jekla za uporabo pod tlakomSteels for pressure purposesICS:Ta slovenski standard je istoveten z:EN 10028-6:2009SIST EN 10028-6:2009en,fr,de01-september-2009SIST EN 10028-6:2009SLOVENSKI
STANDARDSIST EN 10028-6:20031DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10028-6June 2009ICS 77.140.30; 77.140.50Supersedes EN 10028-6:2003
English VersionFlat products made of steels for pressure purposes - Part 6:Weldable fine grain steels, quenched and temperedProduits plats en acier pour appareils à pression - Partie 6:Aciers soudables à grains fins, trempés et revenusFlacherzeugnisse aus Druckbehälterstählen - Teil 6:Schweißgeeignete Feinkornbaustähle, vergütetThis European Standard was approved by CEN on 14 May 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10028-6:2009: ESIST EN 10028-6:2009

page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Dimensions and tolerances . 4 5 Calculation of mass . 4 6 Classification and designation . 4 6.1 Classification . 4 6.2 Designation . 4 7 Information to be supplied by the purchaser . 5 7.1 Mandatory information . 5 7.2 Options . 5 7.3 Example for ordering . 5 8 Requirements . 5 8.1 Steelmaking process . 5 8.2 Delivery condition . 5 8.3 Chemical composition . 6 8.4 Mechanical properties . 6 8.5 Surface condition. 6 8.6 Internal soundness . 6 9 Inspection . 6 9.1 Types of inspections and inspections documents . 6 9.2 Tests to be carried out . 6 9.3 Retests . 6 10 Sampling . 6 11 Test methods . 7 12 Marking . 7 Annex ZA (informative)
Relationship between this
European
Standard and the Essential Requirements of EU Directive 97/23/EC . 12 Bibliography . 13
b) series with elevated temperature properties (P.QH); c) series with low temperature properties down to -40 °C (P.QL1); d) series with low temperature properties down to -60 °C (P.QL2). 6.1.2 In accordance with EN 10020 all the steels specified in this document are alloy special steels. 6.2 Designation See EN 10028-1:2007 + A1:2009. SIST EN 10028-6:2009

EN 10028-1:2007 + A1:2009 apply. If the purchaser does not indicate a wish to implement any of these options at the time of enquiry and order, the products shall be supplied in accordance with the basic specification (see also
EN 10028-1:2007 + A1:2009). 1) providing data on suitable welding conditions (see 8.2.3); 2) mid thickness test pieces for the impact test (see Clause 10); 3) lower copper content and maximum tin content (see Table 1, footnote c); 4) mechanical properties for thicknesses > 150 mm (see Table 3, footnote b); 5) specification of a minimum impact energy of 40 J (see Note to 8.4 and Table 4, footnote a); 6) applicability of elevated temperature values for QL grades (see Table 5, footnote b). 7.3 Example for ordering 10 plates with nominal dimensions, thickness = 50 mm, width = 2 000 mm, length = 10 000 mm, made of a steel grade with the name P355QL2 and the number 1.8869 as specified in EN 10028-6, inspection certificate 3.1 as specified in EN 10204: 10 plates – 50 x 2 000 x 10 000 – EN 10028-6 P355QL2 – Inspection certificate 3.1 or 10 plates – 50 x 2 000 x 10 000 – EN 10028-6 1.8869 – Inspection certificate 3.1. 8 Requirements 8.1 Steelmaking process See EN 10028-1:2007 + A1:2009. 8.2 Delivery condition 8.2.1 The products covered by this European Standard shall be supplied in the quenched and tempered condition. 8.2.2 The steels specified in this European Standard shall be suitable for welding processes in current use (see Notes 1 to 3 to 8.2.3). 8.2.3 •• The manufacturer shall, if requested, provide the purchaser with data on suitable welding conditions determined on the basis of weld procedure tests. NOTE 1
With increasing product thickness and strength level cold cracking can occur. Cold cracking is caused by the follo-wing factors in combination: a)
the amount of diffusible hydrogen in the weld metal; b)
brittle structure of the heat affected zone; SIST EN 10028-6:2009

tensile stress concentrations in the welded joint. NOTE 2
When using recommendations as laid down, for example in EN 1011-1 and EN 1011-2, the recommended welding conditions and the various welding ranges of the steel grades can be determined depending on the product thickness, the applied welding energy, the design requirements, the electrode efficiency, the welding process and the weld metal properties. NOTE 3 Excessive post weld heat-treatment (PWHT) conditions can decrease the mechanical properties. It is therefore recommended that the purchaser seeks, at the time of enquiry and order, the advise of the manufacturer and considers, where appropriate, the verification of the mechanical properties on simulated post weld heat treated samples. 8.3 Chemical composition 8.3.1 The requirements of Table 1 apply for the chemical composition according to the cast analysis. 8.3.2 The product analysis may deviate from the specified values of the cast analysis given in Table 1 by the values given in Table 2. 8.4 Mechanical properties The values given in Tables 3 to 5 apply (see also EN 10028-1:2007 + A1:2009 and Clause 10). NOTE Optionally, a minimum impact energy value of 40 J may be specifi
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