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Corten Steel / Corrosion Resistant Steel Plates

Corten Steel

Weather resistant steel
Physical Properties

Weather resistant steel	Standard	Tensile Strength MPa	Yield Strength MPa	Elongation in 2 inches (min.) %
Corten-A	US steel	470-630	355	20
IRSM 41-97	Indian Railways	480 min	340 min	21

Chemical Properties

Weather resistant steel	C	Mn	P	S	Si	Cr	Ni	Mo	Cu	Fe
Corten-A	0.12	0.20-0.50	0.070-0.150	0.030	0.25-0.75	0.50-1.25	0.65	-	0.25-0.55	-
IRS M-41	0.10	0.25-0.45	0.075-0.112	0.030	0.28-0.72	0.35-0.49	0.20-0.49	-	0.30-0.39	-

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
The notched-bar impact energy is determined on ISO-V longitudinal test specimans 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
speciman 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*)
1 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
General Processing Information
Corrosion resistant steel - Weathering Steel grade

Corrosion Resistant Steel Plates

Atmospheric Corrosion Resistant Steel
	Steel Grade			Material No.
	TKS Standard	EN Standard	ASTM Standard
	COR-TEN A	S355JOWP	ASTM A 242 TYPE 1	1.8946

Chemical Composition :

C	Si	Mn	P	S	Cr	Cu	Ni
≤ 12	0.25 - 0.75	0.20 - 0.50	0.07 - 0.15	≤ 0.030	0.50 - 1.25	25 - 0.55	= 0.65

Mechanical Properties : Hot Rolled Sheets

Yield Strength (MPa)	Tensile Strength (MPa)	Minimum Elongation A (Lo = 5.65 vSo) %
355	470 - 630	20

Mechanical Properties : Cold Rolled Sheets = 3 mm in thickness

Yield Strength (MPa)	Tensile Strength (MPa)	Minimum Elongation A %
275	410	25