corten-steelWeathering steel, best-known under the trademark COR-TEN steel and sometimes written without the hyphen as “Corten steel”, is a group of steel alloys which were developed to eliminate the need for painting, and form a stable rust-like appearance if exposed to the weather for several years.

United States Steel Corporation (USS) holds the registered trademark on the name COR-TEN.[1] Although USS sold its discrete plate business to International Steel Group (now Arcelor-Mittal) in 2003,[2] it still sells COR-TEN branded material in strip-mill plate and sheet forms.

The original COR-TEN received the standard designation A 242 (“COR-TEN A”) from the ASTM International standards group. Newer ASTM grades are A 588 (“COR-TEN B”) and A 606 for thin sheet. All alloys are in common production and use.

 

Properties

“Weathering” means that due to their chemical compositions, these steels exhibit increased resistance to atmospheric corrosion compared to other steels. This is because the steel forms a protective layer on its surface under the influence of the weather.

The corrosion-retarding effect of the protective layer is produced by the particular distribution and concentration of alloying elements in it. The layer protecting the surface develops and regenerates continuously when subjected to the influence of the weather. In other words, the steel is allowed to rust in order to form the ‘protective’ coating. The benefits of such a steel are immediately obvious – a self–protecting steel is economic, long lasting and easily recyclable.


Specification

SAILCOR IRSM41 / IRSM41-97 / IRS-M41 / IRSM-41 / IRS-M41-97 / JIS G3125SPA-H CORROSION RESISTANT WEATHER RESISTANT STEEL STEEL, PLATE COLD ROLLED & HOT ROLLED FOR RAILWAY WAGON & CONTAINER

JIS G 3125:2004: Japanese grade for weather resistant steel plates: Superior atmospheric corrosion resisting rolled steels This Standard specifies the rolled steel having high atmospheric corrosion resistance, to be used for vehicle, building, steel tower and other structure.

IRSM 41-97: Corrosion Resistance steel INDIAN grade for weather resistant steel plates: IRSM 41-97 standard of Indian railways specifically formed for wagon body due to it high resistance to corrosion, Major wagon builder being Rail Coach Factory.

 

Standard & Specification :

  •  COR-TEN® A, COR-TEN®A, COR-TEN A, CORTEN-A, CORTEN A
  • COR-TEN® B, COR-TEN®B, COR-TEN B, CORTEN-B, CORTEN B
  • ASTM A588 Grade A, ASTM A 588 Grade-A, ASTM A-588 Grade A
  • ASTM A588 Grade B, ASTM A 588 Grade-B, ASTM A-588 Grade B
  • ASTM A588 Grade C, ASTM A 588 Grade-C, ASTM A-588 Grade C
  • ASTM A242 Type 1, ASTM A242 Type-1, ASTM A-242 Type 1
  • S355JOWP EN 10025-5, S355JOWP EN10025-5, S355 JOWP EN-10025-5
  • S355JOWP+N EN 10025-5, S355JOWP+N EN10025-5, S355 JOWP+N EN-10025-5
  • S355J2W EN 10025-5, S355J2W EN10025-5, S355 J2W EN-10025-5
  • S355J2W+N EN 10025-5, S355J2W+N EN10025-5, S355 J2W+N EN-10025-5
  • S355J2G1W EN 10155, S355J2G1W EN10155, S355 J2G1W EN-10155
  • S355K2G1W EN 10155, S355K2G1W EN10155, S355 K2G1W EN-10155
  • S355J2G2W EN 10155, S355J2G2W EN10155, S355 J2G2W EN-10155
  • S355K2G2W EN 10155, S355J2G2W EN10155, S355 K2G2W EN-10155
  • SAILCOR IRSM41, IRSM-41, IRS-M41 FOR RAILWAY WAGON & CONTAINER
  • JIS G3125 SPA-H, JIS G3125 SPAH, JIS:G3125-SPA-H, JIS-G3125-SPAH, G3125-SPA-H

 

 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
0.03
0.50-1.25
0.25-0.55
-
0.65
COR-TEN B
0.16
0.30-0.50
0.80-1.25
0.03
0.03
0.40-0.65
0.25-0.40
0.02-0.10
0.4


Mechanical Properties

 

Grade
Thickness (mm)
Plate Products
Yield Strength
Tensile Strength
Elongation
Rel N/mm²
Rm N/mm²
A50 %
Strip Products
Minimum
Minimum
Minimum
Corten A
2 – 12
6 – 12
345
485
20
Corten B
2 – 13
6 – 40
345
485
19

 

Equivalent Specification

 

Material #
EN 10155
SEW 087
NFA 35-502
UNI
BS 4360
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
-
-
-
-
-
-


Applications

Weathering steel is popularly used in outdoor sculptures,Bridges,Complex,Marine Transportation,Tanks,Corten Facades,Building, Rail Wagons ETC

 

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