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 thermomechanically 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
S. Structural Steel
E. Engineering Steel
.235. Minimum yield strength (Reh) in MPa @ 16mm
.JO. Longitudinal Charpy V-notch impacts 27 J @ 0 deg C
.J2. Longitudinal Charpy V-notch impacts 27 J @ -20 deg C
.K2. Longitudinal Charpy V-notch impacts 40 J @ -20 deg C
.+AR Supply condition as rolled
.+N Supply condition normalised or normalised rolled
Customer Options
.C. Grade suitable for cold forming
.Z. Grade with improved properties perpendicular to surface
Examples: S235JR+AR, S355K2C+N