Corten Plates, Corten Steel Plates, Corrosion Resistant Plates Supplier in Mumbai-India.
Weathering steel, great-regarded under the trademark corten plates and right here and there composed without the hyphen as "corten plates", is a gathering of metal alloys which had been created to avert the requirement for portray, and structure a solid rust-like appearance if provided to the climate for some years.
Reading the text: Parts of this page are machine-paraphrased. “Weathering steel” is the general name of the group; COR-TEN (spelled with a hyphen) is the trademarked name, which many suppliers write as “Corten”. “Portray” means painting, “structure a solid rust-like appearance” means to form a stable rust-like layer, and “provided to the climate” means exposed to the weather.
Corten Plates, Corten Steel Plates, Corrosion Resistant Plate, Corten A Steel Plates, Corten B Steel Plates, Corten Steel IRS M-41 plates, CORTEN PLATES ASTM A 588, CORTEN PLATES ASTM A 242, CORTEN PLATES Services, Corten high wear resistant steel Plates, COR-TEN O, COR-TEN 490, COR-TEN 570, Cor-ten steel plate ASTM equivalents.
About this list: This is a list of names and search terms for the range. “Corten high wear resistant steel” is misleading: weathering steel resists atmospheric corrosion but is not a wear-resistant steel; for abrasion service see Abrasion Resistant Plates. COR-TEN O, 490 and 570 have no separate pages here, so state the designation and standard in your enquiry.
USA steel Corporation (uss) holds the enlisted trademark at the call corten. Even though USA sold its discrete plate business to global steel group (now Arcelor-mittal) in 2003, regardless it gives corten marked fabric in strip-manufacturing facility plate and sheet systems.
Who is who: “USA steel Corporation (uss)” is United States Steel Corporation, which holds the COR-TEN trademark. The “global steel group” that bought its plate business in 2003 is International Steel Group, which later became part of ArcelorMittal.
The first corten were given the same old undertaking A 242 ("Corten a") from the ASTM global gauges organization. Greater modern-day ASTM reviews are A 588 ("Corten B") and a 606 for meager sheet. In Indian requirements is applicable in keeping with IRSM 41. All combos are in like manner introduction and usage.
Specifications: “The same old undertaking A 242” means the original specification, ASTM A242. A588 is the later structural grade, and ASTM A606 covers thin sheet and strip. IRS M41 is the Indian Railways specification for weathering steel. Our A242, A588 and S355J0W pages give the detail.
Corten Plates: Quick Buying Information
| Buying item | Information to specify |
|---|---|
| Grade and standard | Corten A (ASTM A242), Corten B / ASTM A588 Grade A, or S355J0W to EN 10025-5; say which standard your drawing cites. |
| Dimensions | Thickness × width × length in mm or inches; number of plates or total weight. |
| Exposure | Where the plate will stand, whether it will be painted, and whether it stays wet or sees salt. |
| Processing | Cut-to-size pieces or profiles, with drawing, hole, bending and welding requirements. |
| Documents | Mill test certificate type (for example EN 10204 3.1), impact test and inspection. |
For wear rather than weather, compare quenched wear plate on our Abrasion Resistant Plates page.
Explore Our Corten Plate Range
Corten A
Corten A Plates
Corten A weathering steel plate, with its chemistry table, features and applications for structures left unpainted.
View Corten A Plates
ASTM A588
A588 GRADE A Corten Plates
ASTM A588 Grade A: 345 MPa (50 ksi) minimum yield weathering structural plate to 100 mm, with the gauge and stock-length table.
View A588 GRADE A Corten Plates
ASTM A242
ASTM A 242 Corten Plates
The original Corten specification, with yield and tensile strength by thickness band from 0.75 in up to 4 in.
View ASTM A 242 Corten Plates
S355J0W
S 355JOW Corten Plates
EN S355 weathering grades with their Corten A/B, SAIL and IRS M41 names, scope, definition and applications.
View S 355JOW Corten PlatesCharacteristics
"Weathering" implies that due to their compound creations, those steels show increased resistance to barometrical corrosion contrasted with unalloyed steels. That is as a consequence of the steel structures a protecting layer on its floor suffering from the weather. The corrosion impeding impact of the defensive layer is delivered by way of the particular appropriation and centralization of alloying additives in it. The layer ensuring the floor creates and recovers persistently when subjected to the impact of the weather. On the cease of the day, the metal is allowed to rust preserving in mind the cease aim to shape the "defensive" covering.
Reading the text: “Barometrical” means atmospheric. “On the cease of the day, the metal is allowed to rust…” means the steel is allowed to rust so that the protective layer can form. The layer keeps forming and renewing as the weather acts on it, which is why the plate is not painted.
Where Weathering Steel Works Well, and Where It Does Not
The protective layer builds through repeated wetting and drying in the open air. Weathering steel is therefore chosen for plate that is left bare outdoors, such as bridges, buildings, containers and tanks, and it is not painted for protection. Early on the surface looks bright orange-brown and the rust runoff can mark nearby concrete or paving; the colour settles over time.
| Suits | Needs care, or another material |
|---|---|
| Open-air exposure with wet and dry cycles | Surfaces that stay wet all the time, or are buried or submerged |
| Rural, urban and light-industrial atmospheres | Salt spray, marine splash zones and de-icing salts: check with the mill |
| Details that drain freely and stay ventilated | Crevices, pockets and overlaps that hold water and debris |
| Structures where early rust runoff is acceptable | Edges above concrete, stone or paving that runoff would stain |
General guidance on weathering steel. The designer's specification and the mill's advice decide suitability for a particular site.
Chemical Composition
| Grade | %C | %Si | %Mn | %P | %S | %Cr | %Cu | %V | %Ni |
|---|---|---|---|---|---|---|---|---|---|
| CORTEN 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 |
| CORTEN B | 0.19 | 0.30-0.65 | 0.80-1.25 | 0.035 | 0.030 | 0.40-0.65 | 0.25-0.40 | 0.02-0.10 | 0.40 |
Reading the table: A single number is a maximum; a range is minimum to maximum, and “…..” means no value is given. Corten A is the phosphorus-bearing type (0.07–0.15% P) with more chromium; Corten B has more manganese (0.80–1.25%) and added vanadium (0.02–0.10%).
Mechanical Properties
| Grade | Minimum yield point ReH Mpa *) |
Tensile strength Rm MPa |
Minimum elongation A (Lo=5.65 √So) % |
|---|---|---|---|
| CORTEN A | 345 | 485 | 20 |
| CORTEN B | 345 | 485 | 19 |
Reading the table: These are minimum values. The asterisk after “Mpa” refers to a footnote that the original page does not give. Minimum yield falls as plate gets thicker (see the ASTM A242 and A588 pages), and elongation is measured on a proportional gauge length (5.65√So).
Corten A or Corten B?
| Item | Corten A | Corten B |
|---|---|---|
| Standard it is linked to | ASTM A242 | ASTM A588 |
| Plate thickness (scope) | Up to 12.5 mm | Up to 50 mm |
| Minimum yield / tensile | 345 / 485 MPa | 345 / 485 MPa |
| Minimum elongation | 20% | 19% |
| Carbon, max | 0.12% | 0.19% |
| Manganese | 0.20–0.50% | 0.80–1.25% |
| Phosphorus | 0.07–0.15% | 0.035% max |
| Chromium | 0.50–1.25% | 0.40–0.65% |
| Copper | 0.25–0.55% | 0.25–0.40% |
| Vanadium | Not given | 0.02–0.10% |
Taken from the chemical and mechanical tables above and the scope on our S 355JOW page. ASTM A242 and A588 plate is listed up to 100 mm on their own pages, so the 12.5 mm and 50 mm scope applies to the Corten A and B designations, not to those standards. Confirm the exact grade on the mill certificate.
How to Select the Right Corten Plate
- Exposure
- Thickness
- Standard
- Welding & cutting
- Bare or painted
Start with the standard your drawing or the structure's specification names: ASTM A242, ASTM A588 or EN 10025-5 (S355J0W). Then check the thickness range, the impact-test temperature and the exposure. Plate that will be welded and left bare should be specified with matching weathering welding consumables. This guidance supports purchasing; the structural designer's approved material decides suitability.
Applications and Service Requirements
| Application (from the product pages) | Why weathering steel | Selection input |
|---|---|---|
| Bridges and buildings | Welded, riveted or bolted structures left unpainted | Standard, thickness and impact requirement |
| Containers and rolling stock | Higher strength and atmospheric corrosion resistance | Plate thickness and forming needs |
| Oil rigs, oil platforms and harbour construction | Bare steel with atmospheric corrosion resistance | Exposure, coating plan and inspection |
| Tanks, bins and exhaust systems | Bare steel in open-air service | Wet and dry cycling, temperature and drainage |
| Vehicle and machine structures | Strength and weather resistance in moving equipment | Thickness, welding and fatigue loading |
| Petrochemical equipment with hydrogen sulfide media | Listed for corrosive media containing hydrogen sulfide | Confirm suitability with the process designer |
These are material application examples. Final selection depends on the actual service conditions and equipment specification.
Grade Names and Identifiers
| Name or system | Designation | Note |
|---|---|---|
| Corten A | ASTM A242 | The original weathering specification |
| Corten B | ASTM A588 | Structural weathering grade for welded construction |
| European | S355J0W / S355J2W and the WP versions | EN 10025-5; listed together with Corten A and B on our S 355JOW page |
| Indian Railways | IRS M41 | Specification for weathering steel |
| Japanese | JIS G3125 SPA-H | Weather-resistant steel, listed on our S 355JOW page |
| SAIL | SAILCOR | Brand name listed on our S 355JOW page |
These names describe the same type of steel but are not identical: chemistry, thickness range and impact requirements differ by standard. State the standard on your enquiry and confirm the grade on the mill test certificate.
Cut-to-Size Plates and Fabrication
Corten plate can be cut to size and shape to your drawings through our cutting services, including plasma cutting. Send the drawing, thickness, quantity, hole positions and tolerances. Weld with a qualified procedure, and ask for weathering-type filler metal where welds will be left bare outdoors.
Testing, Material Documents and Traceability
State the certificate type and test scope with the RFQ. A mill test certificate for the plate and the company's quality-system certification are different documents.
| Requirement | What to identify in the order |
|---|---|
| Material certificate | EN 10204 3.1 or 3.2 as required, showing standard and grade, chemistry and mechanical results |
| Impact test | Charpy test temperature and minimum energy, if required |
| Heat traceability | Heat or plate number on the plate and certificate; transfer to cut pieces where required |
| Inspection | Buyer or third-party inspection, dimensional checks and report format |
Review our Quality Policy and include your project inspection requirements in the enquiry.
Why Source Corten Plates from Champak Industries?
Our Mumbai service centre supplies Corten plate alongside other corrosion resistant, abrasion resistant and high tensile plate, so one enquiry can compare materials for the same structure. Plates can be cut to size and shape to your drawings, and supplied for India or export with the documents you need. Read our Company Profile for the wider supply offering.
Corten Plate Price and Quotation
Price depends on the grade and standard, thickness, plate size, quantity, cutting, testing, inspection, packing and destination. Send a complete requirement for a quotation stating the price basis, tax and freight treatment and validity.
Domestic Dispatch and Export Requirements
For domestic orders, give the delivery address and unloading requirements. For exports, specify the destination, delivery terms, packing and marking instructions and the shipping documents required, with your required delivery date.
Frequently Asked Questions About Corten Plates
01What does the Corten Plates range include?
The range covers Corten A (ASTM A242), Corten B / ASTM A588 Grade A and S355J0W weathering steel plate, each with its own product page. These are atmospheric corrosion resistant (weathering) steels.
02What is the difference between Corten A and Corten B?
Corten A is the original grade, high in phosphorus (0.07–0.15%) with chromium of 0.50–1.25%. Corten B has more manganese (0.80–1.25%), less phosphorus and added vanadium, and is listed for thicker plate. Both are listed with 345 MPa minimum yield and 485 MPa minimum tensile strength.
03Is Corten A the same as ASTM A242, and Corten B the same as A588?
The page gives A242 as the original “Corten A” specification and A588 as the later “Corten B” grade. Grades of the same type are comparable, not identical, so confirm the standard and chemistry on the mill certificate.
04Does Corten plate need painting?
It is designed to be used unpainted in suitable atmospheres, where it forms a protective rust-like layer over some years. Painting is optional and may still be chosen for appearance or for harsh surroundings.
05Does Corten steel rust?
Yes, intentionally. The surface rusts to form the protective layer, which keeps renewing as the weather acts on it. The plate is not supplied pre-rusted, and early rust runoff can stain nearby concrete or paving.
06Where should weathering steel not be used bare?
Where the surface stays wet all the time, is buried or submerged, or is exposed to salt spray, marine splash or de-icing salts, the layer may not stabilise. Check the environment with the mill and your designer.
07Is COR-TEN a brand name?
COR-TEN is a registered trademark of United States Steel Corporation. “Weathering steel” or “Corten-type” is the general name, and several mills supply comparable grades under their own names or standards.
08Can Corten plate be cut and welded?
Yes. It can be cut by plasma or oxy-fuel and welded with a qualified procedure. For parts left bare outdoors, ask for filler metal that weathers like the plate, and follow the mill’s advice on preheat.
09Which certificate should I request?
An EN 10204 3.1 mill test certificate showing the standard and grade, heat number, chemistry and mechanical properties, plus impact results where you specify a test temperature.
10How do I get a price and delivery date?
Send the grade or standard, thickness, size or cutting drawing, quantity, destination and required date through the enquiry form below, by WhatsApp or by phone.