The following information supplied in our technical section has been compiled from various standards publications. 

It is by no means comprehensive and is for quick reference only.

For more detailed information please contact our sales department who will be happy to supply you with up-to-date technical help

	Introduction
	EN Specification The New European Standard EN10025:2004 Grade Designation Systems Symbols Used in EN10025 Part 2, Part 3, Part 4, Part 5, Part 6 Grade Properties & Nearest Equivalents
	Lloyds Specification
	Other Specifications

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INTRODUCTION

As part of the exercise towards the removal of technical barriers to trade, the European Committee for Iron & Steel Standardisation (ECISS) has prepared a series of European Standards (ENs) for structural steels.

EN 10025 : 2004 is the new European standard for structural steel. The following pages show the new grades, properties and the nearest equivalent grades from former standards including EN 10025 : 1993. The grade designation system is also explained.

Dent Steel can provide a very wide range of rolled sections and plates and the information following has been prepared to show how the new standard applies to these products.

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 was reissued 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 In June 1994, EN 10210 : part 1 was published and at the same time BS 4360 was officially withdrawn.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In 1996, with the publication of EN 10137, BS 7613 was withdrawn.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.

The New European Standard EN 10025 : 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 six parts are

PART 1 General technical delivery conditions.

PART 2 Technical delivery conditions for non-alloy structural steels. (Supersedes EN 10025 : 1993)

PART 3 Technical delivery conditions for normalised/normalised rolled weldable fine grain structural steels. Supersedes EN 10113 : parts 1 & 2 : 1993

PART 4 Technical delivery conditions for thermo mechanically rolled weldable fine grain structural steels. (Supersedes EN 10113 : parts 1 & 3 : 1993

PART 5 Technical delivery conditions for structural steels with improved atmospheric corrosion resistance – also known as weathering steels. (Supersedes EN 10155 : 1993

PART 6 Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition. (Supersedes EN 10137 : parts 1 & 2:1996)

Grade Designation Systems

The designation systems used in the new standard are similar but not identical to EN 10025 : 1993 and very different to the more familiar BS 4360 designations so the guide below has been prepared to assist purchasers, specifiers, designers and steel users.

Symbols used in EN 10025 : part 2 : 2004 Non-alloy structural steels

Symbols used in EN 10025 : part 3 : 2004 Normalised/normalised rolled weldable fine grain Structural steels.

Symbols used in EN 10025 : part 4 : 2004 Thermo mechanically rolled weldable fine grain Structural Steels

Symbols used in EN 10025 : part 5 : 2004 Structural Steels with improved atmospheric corrosion resistance – also known as weathering steels.

Symbols used in EN 10025 : part 6 : 2004 Flat products of high yield strength structural steels in the quenched and tempered condition

Grades, properties and nearest equivalents

The below tables show the grades, properties and nearest equivalent grades from earlier standards. The grade designations have been explained earlier.

Table 1

EN 10025 : part 2 : 2004 Non-alloy structural steels

(1 MPa = 1 N/mm2)

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 is the JR version for each yield strength variation. Verification of the specified impact value is only carried out when agreed at the time of the enquiry and order.

Table 2

EN 10025 : part 3 : 2004 Normalised/normalised rolled weldable fine grain structural steels

Table 3

EN 10025 : part 4 : 2004 Thermo mechanically rolled weldable fine grain structural steels