Products Corten Plate

Weathering 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 obviate 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. In Indian Standards is applicable as per IRS M-41. 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 unalloyed 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.

Chemical composition of Cor-ten grades

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

The mechanical properties of weathering steels depend on which alloy and how thick the material is.

ASTM A 242
The original A 242 alloy has a yield strength of 50,000 pounds per square inch (340,000 kPa) and ultimate tensile strength of 70,000 psi (480,000 kPa) for light-medium rolled shapes and plates up to 0.75 inches (19 mm) thick. It has yield strength of 46,000 psi (320,000 kPa) and ultimate strength of 67,000 psi (460,000 kPa) for medium weight rolled shapes and plates from 0.75–1 inch (19–25 mm) thick. The thickest rolled sections and plates – from 1.5–4 in (38–100 mm) thick have yield strength of 42,000 psi (290,000 kPa) and ultimate strength of 63,000 psi (430,000 kPa).

ASTM A 588
A 588 has a yield strength of at least 50,000 psi (340,000 kPa), and ultimate tensile strength of 70,000 psi (480,000 kPa) for all rolled shapes and plate thicknesses up to 4 in (100 mm) thick. Plates from 4–5 in (100–130 mm) have yield strength at least 46,000 psi (320,000 kPa) and ultimate tensile strength at least 67,000 psi (460,000 kPa), and plates from 5–8 in (130–200 mm) thick have yield strength at least 42,000 psi (290,000 kPa) and ultimate tensile strength at least 63,000 psi (430,000 kPa).

IRSM 41
IRSM 41 Steel: Body panel of Coal Wagons like BOXNHA encounter corrosive environment due to presence of sulphur and other carbonoic acid components in coal. Use of corrosion resistance steel to IRSM-41 will face the situation better due to formation of an adherent protective oxide film on the surface if it is left undisturbed.

IRSM-41 steel has following properties- 
n Stronger than mild steel 
n Easily weldable 
n Develops its own protective film against corrosion.

Services
Plasma Cutting Steel Plate 

Chhajed Steel can offer plasma cutting of Corten steel plate up to 10 feet wide and 95 feet long per your requirements. 

CORROSION RESISTANT AND WEATHER RESISTANT STEEL CAN BE ALSO SUPPLIED ACCORDING TO FOLLOWING STANDARD & SPECIFICATIONS :

  • 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 & CONTAINERS 

Inspection & Approval Certificates : C/W Certificate (Calibration Works Certificate) EN 10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate, NACE MR-0103 / NACE MR-0175 / ISO 15156, CE Marked, European Pressure Equipment Directive PED-97/23/EC, AD-2000-WO, ASME Boiler & Pressure Vessel Code Sec.II Part A Ed. 2008, API 6A (American Petroleum Institute), with 3.2 certificate duly Certified & Approved by LRS (Lloyd's Register), GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS (American Bureau of Shipping), SGS, TUV, RINA, IRS, NORSOK Approved Standard M-630, M-650 Rev.3

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