BS EN10025 structural steel plate and equivalent ASTM

S235 Structural Steel Plate

ANSON Steel offers structural steel plate that meets the European standard for structural steel. Structural steel is a standard construction material, made from specific grades of steel and formed in a range of industry standard cross-sectional shapes (or ‘Sections’). Structural steel grades are designed with specific chemical compositions and mechanical properties formulated for particular applications. We carry EN 10025-2, in grades of S235, S275, S355, S420, S690 and S890. Besides that, we also offer EN10025-3, EN10025-4, EN10025-5 and EN10025-6.

Inline with the European Standard classifications, Structural steels must be referenced using standard symbols including but not limited to: "S"235"J2’‘K2’’C’’Z’’W’’JR’’JO’’.

S – denotes the fact that it is Structural Steel
235 – related to the minimum yield strength of the steel (tested at a thickness of 16mm)
J2 / K2 / JR / JO – material toughness in relation to the Charpy impact or ‘V’notch test methodology
W – Weathering Steel (Atmospheric Corrosion Resistant)
Z – Structural steel with improved strength perpendicular to the surface
C – Cold-formed

The EU Standard classifications are inherently not a global standard and therefore a number of corresponding grades with the same Chemical and Mechanical properties may be used in other parts of the world. For example, Structural Steels fabricated for the US market must be specified in accordance with the ASTM International guidelines and will be referenced with an ‘A’ and then the relevant Grade such as A36, A514 etc.

EN 10025 US Equivalent Grades

EU	US
S235	A283C
S275	A570Gr40
S355	A572Gr50

Chemical Composition of Structural Steels - S235, S275 and S355

Grade	C%	Mn%	P%	S%	Si%
S235	0.22 max	1.60 max	0.05 max	0.05 max	0.05 max
S275	0.25 max	1.60 max	0.04 max	0.05 max	0.05 max
S355	0.23 max	1.60 max	0.05 max	0.05 max	0.05 max

Yield Strength of of Structural Steel - S235, S275, S355

Structural Steel Grade at 16mm	Minimum Yield Strength at nominal thickness 16mm
Structural Steel Grade at 16mm	ksi	N/mm ² (MPa)
S235	33 000 ksi	235 N/mm ²
S275	36 000 ksi	275 N/mm ²
S355	50 000 ksi	355 N/mm ²