En10028-3

Corus Construction & Industrial

European structural steel standard EN 10025 : 2004
Explanation and comparison to previous standards

Introduction

EN 10025 : 2004 is the new European standard for structural steel.
EN 10025 : 2004 is the new European standard for structural steel. This leaflet shows the new grades, properties and the nearest equivalent grades from former standardsincluding EN 10025 : 1993. The grade designation system is also explained. • Part 1 - General technical delivery conditions. 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) 1724 404400 and ask for ‘Plate products range ofsizes’ 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 10025 : 1990, partly superseding BS 4360 : 1986, which wasre-issued as BS 4360 : 1990. In 1993, a second edition of EN 10025 was made available together with EN 10113 : parts 1, 2 & 3 and EN 10155. In June 1994, EN 10210 : part 1 was published and at the same time BS 4360 was officially withdrawn.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 7668. In 1996, with the publication of EN10137, BS 7613 was withdrawn. BS 7668 will remain until an EN for atmospheric corrosion resistant hollow sections is available. In 2004 the standard EN 10025 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. • Part 6 - Technicaldelivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition. Supersedes EN 10137 : parts 1 & 2 : 1996 • Part 5 - Technical delivery conditions for structural steels with improved atmospheric corrosion resistance - also known as weathering steels. Supersedes EN 10155 : 1993 • Part 4 - Technical delivery conditions for thermomechanically rolledweldable fine grain structural steels. Supersedes EN 10113 : parts 1 & 3 : 1993 • Part 3 - Technical delivery conditions for normalised/ normalised rolled weldable fine grain structural steels. Supersedes EN 10113 : parts 1 & 2 : 1993 • Part 2 - Technical delivery conditions for non-alloy structural steels. Supersedes EN 10025 : 1993 The new standard EN 10025 : 2004 The new standard is published insix parts and draws together earlier standards to produce one standard for the majority of structural steel products. The parts are:

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European structural steel standard EN 10025 : 2004

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 aresimilar but not identical to EN 10025 : 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 10025 : part 2 : 2004 Non-alloy structural steels
S... E... .235... ...JR.. ...J0.. ...J2.. ...K2.. ...+AR ...+N Structural steel Engineering steel Minimum yield strength (Reh) in MPa@ 16mm Longitudinal Charpy V-notch impacts 27 J @ +20°C Longitudinal Charpy V-notch impacts 27 J @ 0°C Longitudinal Charpy V-notch impacts 27 J @ -20°C Longitudinal Charpy V-notch impacts 40 J @ -20°C Supply condition as rolled S... Supply condition normalised or normalised rolled .275... Customer options ...M.. ...C.. ...Z.. Grade suitable for cold forming Grade with improved properties...