COR-TEN A applies to plates up to 12.5mm in thickness, COR-TEN B applies to plates up to 50mm in thickness.

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.

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.

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

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.

1. Yield point min. : 275 Mpa
2. Tensile strength min.: 410 Mpa
3. Elongation min. :25%
4. Tolerances on dimensions and shape according to :EN10131.

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.

1. 1 tensile test
2. 1 test specimen per 40 t from each heat*)
3. Notched bar impact test
4. 1 set specimens per 40 t from each heat *)
5. (3 specimens) (at test temperature -20°C) as referenced in EN 10025-5

Material # EN 10155 SEW 087 NFA 35-502 UNI BS 4360 UNE ASTM JIS G3114
8961 S235J2W WTSt 37-3 E 24 W 4 Fe 360 DK 1
8945 S355J0WP E 36 WA 3 Fe 510 C1K1 WR 50 A
8946 S355J2WP - E 36 WA 4 Fe 510 D1K1 A 242 Type 1 -
8959 S355J0W - E 36 WB 3 Fe 510 C2K1 WR 50 B - A 588 - A 242 Gr. 1 SMA 50 AW
8963 S355J2G1W WTSt 52-3 - Fe 510 D2K1 WR 50 C - A 588 Gr. A to
8965 S355J2G2W SMA 50 CP
8966 S355K2G1W - E 36 WB 4A 709 Gr. 50 W -
8967 S355K2G2W

1. COR-TEN® B, COR-TEN®B, COR-TEN B, CORTEN-B, CORTEN B
2. ASTM A588 GR. A, ASTM A 588 GR.A, ASTM A588 GR.A, ASTM A 588 GR. A,
3. EN-10025-5 S355J2W, EN10025 S 355 J2W, EN-10025 S355J2W
4. S355J2G1W EN10155, S 355 J2G1W EN-10155, S355J2G1W EN-10155