CORTEN-A Steel Plates S355JOWP EN10025-5  

CORTEN Steel Grade-A / CORTEN Steel Grade-B / S355JOWP / S355JOWP+N / S355J2WP
/ S355J2WP+N / S355JOW / S355JOW+N / S355J2W / S355J2W+N  
SPA-H ATMOSPHERIC CORROSION RESISTANT STEEL / WEATHER RESISTANT STEEL SHEET;


Scope    
COR-TEN A applies to plates up to 60mm in thickness, COR-TEN B applies to plates up to 100 mm in
thickness.    

Definition    
Weathering means that due to their chemical compositions COR-TEN A and COR-TEN B steels, when utilized
unprotected, exhibits increased resistance to atmospheric corrosion compared to unalloyed steels. This is
because it forms a protective layer on its surface under the influence of the weather.    

Applications    
The steel is used for various types of welded, bolted and riveted constructions e.g. steel frame structures,
bridges, tanks and containers, exhaust systems, vehicles and equipment constructions.    
Basic guidelines for the use of this steel in the unprotected condition are described in EN 10025-5 and
DASt rule 007.    

Chemical Composition (heat analysis, %)    
 

Grade C Si Mn P S Cr Cu V Ni COR-TEN A 0.12 0.25-0.75 0.20-0.50 0.07-0.15 0.030 0.50-1.25 0.25-0.55 - 0.65 COR-TEN B 0.16 0.30-0.50 0.80-1.25 0.030 0.030 0.40-0.65 0.25-0.40 0.02-0.10 0.40

In order to obtain fine grain structure a sufficient amount of nitrogen absorbing elements is added (e.g. ≥0.02% Al).    

Mechanical Properties, in the state of delivery condition    
At room temperature for plates ≥3mm in thickness (transverse test specimans, according to EN 10002). Requirements to hot rolled plates ≤3mm in thickness according to EN 10025-5.    
 

Grade Minimum yield point (ReH Mpa *) Tensile strength Rm MPa Minimum elongation A (Lo=5.65 √So) % COR-TEN A 355 470-630 20

*) 1 Mpa = 1N/mm2    

In case of cold rolled material the yield point is min. 310 Mpa and the tensile strength min. 445 MPa. Furthermore cold rolled sheets ≤3mm in thickness made of steel grade COR-TEN A-F for increased demand to the cold formability is available.    

Mechanical properties:

• Yield point min. 275 Mpa
• Tensile strength min. 410 Mpa
• elongation min. 25%
• Tolerances on dimensions and shape according to EN 10131.

 

Grade Material thickness mm Minimum yield point (ReH Mpa *) Tensile strength Rm MPa Minimum elongation A (Lo=5.65 √So) % COR-TEN B ≤16 355 470-630 20 ≤16 345

*) 1 Mpa = 1N/mm2     

The notched-bar impact energy is determined on ISO-V longitudinal test specimens at a temperature of - 20°C as an average of three tests. For product thicknesses ≥10mm the average value is at least 27 J. For thicknesses between 10mm and 6mm, the minimum impact value is reduced proportionally to the specimen width (product thickness).    

No impact test is performed on products below 6mm in thickness.     

Number of Tests

• 1 tensile test
• 1 test specimen per 40 t from each heat*)
• Notched bar impact test
• 1 set specimens per 40 t from each heat *)
• (3 specimens) (at test temperature -20°C)

*) as referenced in EN 10025-5    

EQUIVALENT SPECIFICATIONS    
 

Material # EN 10155 SEW 087 NFA 35-502 UNI BS 4360 UNE ASTM JIS G3114 1.8961 S235J2W WTSt 37-3 E 24 W 4 Fe 360 DK 1 - - - - 1.8945 S355J0WP E 36 WA 3 Fe 510 C1K1 WR 50 A - - - - 1.8946 S355J2WP - E 36 WA 4 Fe 510 D1K1 - - A 242 Type 1 - 1.8959 S355J0W - E 36 WB 3 Fe 510 C2K1 WR 50 B - A 588 - A 242 Gr. 1 SMA 50 AW 1.8963 S355J2G1W WTSt 52-3 - Fe 510 D2K1 WR 50 C - A 588 Gr. A to 1.8965 S355J2G2W - - - - - - SMA 50 CP 1.8966 S355K2G1W - E 36 WB 4 - - - A 709 Gr. 50 W - 1.8967 S355K2G2W - - - - - - -