European structural steel standard EN : 2004 Explanation and comparison to previous standards
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1 Corus Construction & Industrial European structural steel standard EN : 2004 Explanation and comparison to previous standards
2 Introduction EN : 2004 is the new European standard for structural steel. EN : 2004 is the new European standard for structural steel. This leaflet shows the new grades, properties and the nearest equivalent grades from former standards including EN : The grade designation system is also explained. Corus produces a very wide range of rolled sections and plates and the information below has been prepared to show how the new standard applies to these products. For information on the size ranges available please ring +44 (0) and ask for Plate products range of sizes for plate and plate cut from coil, or Structural sections to BS4 part 1 for rolled sections. History of the standard The European Committee for Iron and Steel Standardisation is responsible for producing the European Standards (ENs) for structural steels. The first of these standards, EN 10025, was published in the UK by BSI as EN : 1990, partly superseding BS 4360 : 1986, which was re-issued as BS 4360 : In 1993, a second edition of EN was made available together with EN : parts 1, 2 & 3 and EN In June 1994, EN : part 1 was published and at the same time BS 4360 was officially withdrawn. The balance of the BS 4360 steels not affected by these ENs were re-issued in new British Standards BS 7613 and BS In 1996, with the publication of EN 10137, BS 7613 was withdrawn. BS 7668 will remain until an EN for atmospheric corrosion resistant hollow sections is available. The new standard EN : 2004 The new standard is published in six parts and draws together earlier standards to produce one standard for the majority of structural steel products. The parts are: Part 1 - General technical delivery conditions. Part 2 - Technical delivery conditions for non-alloy structural steels. Supersedes EN : 1993 Part 3 - Technical delivery conditions for normalised/ normalised rolled weldable fine grain structural steels. Supersedes EN : parts 1 & 2 : 1993 Part 4 - Technical delivery conditions for thermomechanically rolled weldable fine grain structural steels. Supersedes EN : parts 1 & 3 : 1993 Part 5 - Technical delivery conditions for structural steels with improved atmospheric corrosion resistance - also known as weathering steels. Supersedes EN : 1993 Part 6 - Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition. Supersedes EN : parts 1 & 2 : 1996 In 2004 the standard EN was revised to address the provisions of EU Construction Products Directive (89/106/EEC). It is now published in six parts to bring together almost all the Structural Metallic Products into one comprehensive standard. 2 European structural steel standard EN : 2004
3 Grade designation systems Design and technical advice is available from our Technical Sales & Marketing department. Grade designation systems The designation systems used in the new standard are similar but not identical to EN : 1993 and very different to the familiar BS 4360 designations so the guide below has been prepared to assist purchasers, specifiers, designers and users of steel. Symbols used in EN : part 2 : 2004 Non-alloy structural steels S... Structural steel E... Engineering steel Minimum yield strength (Reh) in 16mm...JR.. Longitudinal Charpy V-notch impacts C...J0.. Longitudinal Charpy V-notch impacts 27 0 C...J2.. Longitudinal Charpy V-notch impacts C...K2.. Longitudinal Charpy V-notch impacts C...+AR Supply condition as rolled...+n Supply condition normalised or normalised rolled...c.. Grade suitable for cold forming...z.. Grade with improved properties perpendicular to the surface Examples: S235JR+AR, S355K2C+N Symbols used in EN : part 3 : 2004 Normalised/normalised rolled weldable fine grain structural steels S... Structural steel Minimum yield strength (Reh) in 16mm...N.....NL.. Longitudinal Charpy V-notch impacts at a temperature not lower than -20 C Longitudinal Charpy V-notch impacts at a temperature not lower than -50 C...Z.. Grade with improved properties perpendicular to the surface Examples: S275N, S420NL Z35 Symbols used in EN : part 4 : 2004 Thermomechanically rolled weldable fine grain structural steels S... Structural steel Minimum yield strength (Reh) in 16mm...M.....ML.. Longitudinal Charpy V-notch impacts at a temperature not lower than -20 C Longitudinal Charpy V-notch impacts at a temperature not lower than -50 C...Z.. Grade with improved properties perpendicular to the surface Examples: S355M, S460ML Z25 European structural steel standard EN :
4 Grade designation systems Grade designation systems (continued) Symbols used in EN : part 5 : 2004 Structural steels with improved atmospheric corrosion resistance also known as weathering steels S... Structural steel Minimum yield strength (Reh) in 16mm...J0.. Longitudinal Charpy V-notch impacts 27 0 C...J2.....K2.....W.....P.....+AR...+N Longitudinal Charpy V-notch impacts C Longitudinal Charpy V-notch impacts C Improved atmospheric corrosion resistance Greater phosphorus content (grade S355 only) Supply condition as rolled Supply condition normalised or normalised rolled...z.. Grade with improved properties perpendicular to the surface Examples: S235J0W+AR, S355K2W+N Z25 Symbols used in EN : part 6 : 2004 Flat products of high yield strength structural steels in the quenched and tempered condition S... Structural steel Minimum yield strength (Reh) in 16mm...Q.....QL.. Longitudinal Charpy V-notch impacts at a temperature not lower than -20 C Longitudinal Charpy V-notch impacts at a temperature not lower than -40 C...QL1.. Longitudinal Charpy V-notch impacts at a temperature not lower than -60 C...Z.. Grade with improved properties perpendicular to the surface Examples: S460Q, S690QL 4 European structural steel standard EN : 2004
5 Grades, properties and nearest equivalents Grades, properties and nearest equivalents The tables below show the grades, properties and nearest equivalent grades from earlier standards. The grade designations are explained on the previous pages. Table 1 EN : part 2 : 2004 Non-alloy structural steels Comparison between grades in EN : part 2 : 2004 and nearest equivalent versions in EN : 1993 and BS 4360 : 1990 EN : part 2 : 2004 EN : 1993 BS 4360 : 1990 Grade Yield (Reh) min Tensile (Rm) Charpy V-notch longitudinal Grade Grade Strength at (MPa) Temp ( C) Energy (J) S / S / S235 40A S235JR S235JRG1/G2 40B S235J S235J0 40C S235J S235J2G3/G4 40D / S275 43A S275JR S275JR 43B S275J S275J0 43C S275J S275J2G3/G4 43D / S355 50A S355JR S355JR 50B S355J S355J0 50C S355J S355J2G3/G4 50D S355K S355K2G3/G4 50DD E / E295 - S / S335 - E / E360 - Notes 1 For all products to be compliant with the EU Construction Products Directive (CPD 89/106/EC) the material must offer a guaranteed minimum impact performance. This has resulted in the removal of this grade from the standard, and the lowest grade now offered is the JR version for each yield strength variation. 2 Verification of the specified impact value is only carried out when agreed at the time of the enquiry and order. European structural steel standard EN :
6 Grades, properties and nearest equivalents Grades, properties and nearest equivalents (continued) Table 2 EN : part 3 : 2004 Normalised/normalised rolled weldable fine grain structural steels Comparison between grades in EN : part 3 : 2004 and nearest equivalent versions in EN : part 2 : 1993 and BS 4360 : 1990 EN : part 3 : 2004 EN : part 2 : 1993 BS 4360 : 1990 Grade Yield (Reh) min Tensile (Rm) Charpy V-notch longitudinal Grade Grade Strength at (MPa) Temp ( C) Energy (J) S275N / S275N 43DD S275NL S275NL 43EE S355N / S355N 50 S355NL S355NL 50EE S420N / S420N - S420NL S420NL - S460N / S460N 55C S460NL S460NL 55EE Table 3 EN : part 4 : 2004 Thermomechanically rolled weldable fine grain structural steels Comparison between grades in EN : part 4 : 2004 and nearest equivalent versions in EN : part 3 : 1993 EN : part 4 : 2004 EN : part 3 : 1993 Grade Yield (Reh) min Tensile (Rm) Charpy V-notch longitudinal Grade Strength at (MPa) Temp ( C) Energy (J) S275M / S275M S275ML S275ML S355M / S355M S355ML S355ML S420M / S420M S420ML S420ML S460M / S460M S460ML S460ML 6 European structural steel standard EN : 2004
7 Grades, properties and nearest equivalents Table 4 EN : part 5 : 2004 weathering steels Structural steels with improved atmospheric corrosion resistance - also known as Comparison between grades in EN : part 5 : 2004 and nearest equivalent versions in EN : 1993 and BS 4360 : 1990 EN : part 5 : 2004 EN : 1993 BS 4360 : 1990 Grade Yield (Reh) min Tensile (Rm) Charpy V-notch longitudinal Grade Grade Strength at (MPa) Temp ( C) Energy (J) S235J0W / S235J0W - S235J2W S235J2W - S355J0WP / S355J0WP WR50A S355J2WP S355J2WP - S355J0W / S355J0W WR50B S355J2W S355J2W WR50C S355K2W S355K2W WR50D Table 5 EN : part 6 : 2004 Flat products of high yield strength structural steels in the quenched and tempered condition Comparison between grades in EN : part 6 : 2004 and nearest equivalent versions in EN : part 2 : 1996 and BS 4360 : 1990 EN : part 6 : 2004 EN : part 2 : 1996 BS 4360 : 1990 Grade Yield (Reh) min Tensile (Rm) Charpy V-notch longitudinal Grade Grade Strength at (MPa) Temp ( C) 1 Energy (J) S460Q / S460Q - S460QL 0 50 S460QL - S460QL S460QL1 55F S500Q / S500Q - S500QL 0 50 S500QL - S500QL S500QL1 - S550Q / S550Q - S550QL 0 50 S550QL - S550QL S550QL1 - S620Q / S620Q - S620QL 0 50 S620QL - S620QL S620QL1 - S690Q / S690Q - S690QL 0 50 S690QL - S690QL S690QL1 - S890Q / S890Q - S890QL 0 50 S890QL - S890QL S890QL1 - S960Q / S960Q - S960QL 0 50 S960QL - Note 1 Other impact temperatures can be specified. European structural steel standard EN :
8 Care has been taken to ensure that this information is accurate, but Corus Group plc, including its subsidiaries, does not accept responsibility or liability for errors or information which is found to be misleading. Copyright 2004 Corus Designed and produced by Orchard Corporate Ltd. Literature hotline: T +44 (0) F +44 (0) Sales office and headquarters: Corus Construction & Industrial PO Box 1 Brigg Road Scunthorpe DN16 1BP United Kingdom T +44 (0) F +44 (0) For Construction related enquiries: Corus Construction & Industrial Technical Sales & Marketing PO Box 1 Brigg Road Scunthorpe DN16 1BP United Kingdom T +44 (0) F +44 (0) For plates technical enquiries and customer support: Corus Construction & Industrial Plates Technical Advisory Services PO Box 1 Brigg Road Scunthorpe DN16 1BP United Kingdom T +44 (0) F +44 (0) NB:1000:UK:12/2004
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