CORTEN-A / CORTEN-B / SAILCOR / SAIL-COR / S355JOWP / S355J2WP / S355JOW / S355J2W / IRSM41-97 / IRS-M41 / IRSM-41 / JIS G3125 SPA-H ATMOSPHERIC CORROSION RESISTANT STEEL / WEATHER RESISTANT STEEL SHEET, PLATE, COIL, COLD ROLLED STEEL SHEET, PLATE, COIL & HOT ROLLED SHEET, PLATE, COIL ASTM A423.
Reading the grade names: The page title writes the grade as S 355JOW with the letter O; the standard grade is S355J0W with the digit zero. The list is a set of equivalent names and search terms. It also mentions cold-rolled and hot-rolled sheet, plate and coil and “ASTM A423”, which appears to be a specification for low-alloy steel tubes rather than plate; state the standard you need in your enquiry.
Reading the Grade Name S355J0W
| Part of the name | Meaning |
|---|---|
| S | Structural steel |
| 355 | Minimum yield strength in MPa for the thinnest plate; it falls as thickness increases |
| J0 / J2 | Impact tested: 27 J at 0 °C (J0) or at −20 °C (J2) |
| W | Weather resistant (atmospheric corrosion resistant) |
| P | Higher-phosphorus version (S355J0WP, S355J2WP), which EN 10025-5 limits to thinner plate |
General explanation of the designation under EN 10025-5. Check the standard and your mill’s certificate for the exact limits.
S 355JOW Corten Plates: Purchasing Specification
| Requirement | What to specify |
|---|---|
| Grade and standard | Corten A (ASTM A242), Corten B / ASTM A588 Grade A or S355J0W (EN 10025-5); say which standard your drawing cites and any quality such as J0 or J2. |
| Thickness | Give the thickness range of your parts; minimum yield falls as plate gets thicker, so check the certificate for heavy plate. |
| Exposure | Where the plate will stand, whether it will be painted, and whether it stays wet or sees salt or de-icing chemicals. |
| Cutting | Plasma or oxy-fuel cutting to your drawing; give hole positions, edge preparation and tolerances. |
| Welding | A qualified procedure; for welds left bare outdoors ask for filler metal that weathers like the plate, and follow the mill’s preheat advice. |
| Documents | Mill test certificate (EN 10204 3.1) with chemistry and mechanical properties, plus impact results if you specify a test temperature. |
Scope
Cor-ten a applies to plates up to 12.five mm in thickness, Cor-ten b applies to plates up to 50 mm in thickness.
Scope: The limits of 12.5 mm and 50 mm are those of the Corten A and Corten B designations. For the S355 grades, thickness ranges follow EN 10025-5, and ASTM A242 and A588 plate to 100 mm is on their own pages.
Definition
Weathering method that because of their chemical compositions Cor-ten a and Cor-ten b steels, whilst applied unprotected, reveals increased resistance to atmospheric corrosion in comparison to unalloyed steels. That is because it bureaucracy a shielding layer on its surface under the influence of the climate.
Reading the text: “Weathering method” means weathering steels. The sentence says that, because of their chemical composition, Corten A and B show better resistance to atmospheric corrosion than unalloyed steel when used unprotected, because a protective layer forms on the surface under the weather.
Packages
The steel is used for diverse types of welded, bolted and riveted structures e.g. metal body systems, bridges, tanks and bins, exhaust systems, vehicles and gadget buildings.
Applications: The heading “Packages” means applications. “Metal body systems” means steel body structures and “gadget buildings” means machine and equipment structures.
basic recommendations for using this metal inside the unprotected condition are described in en 10025-5 and DAST rule 007.
How the Four Corten Pages Differ
The four pages cover weathering steel, the type known as Corten, under different names and standards: Corten A, ASTM A588 Grade A, ASTM A242 and the EN S355J0W grade. All form a protective rust-like layer when left exposed to the weather; the pages differ in the standard they describe and the data they give.
| Page | What it covers | Typical use (from the pages) |
|---|---|---|
| CORTEN A | Corten A features and applications, with a chemistry table | Containers, rolling stock, oil rigs, harbour construction, oil platforms |
| A588 | ASTM A588 Grade A to 100 mm: 50 ksi yield, 70 ksi tensile, gauge and stock-length table | Welded bridges and buildings, bare (unpainted) structures |
| A242 | The original A242 alloy, with yield and tensile strength by thickness band | Rolled shapes and plates up to 4 in (100 mm) |
| S355J0W (this page) | EN S355 weathering grades with Corten A/B, SAILCOR, IRS M41 and JIS SPA-H names, scope and definition | Body structures, bridges, tanks and bins, exhaust systems, vehicles |
State the standard and grade on your enquiry; these names describe the same type of steel but are not identical.
Related plates in this range
Cutting, Fabrication and Welding
Champak Industries describes full and part plate/profile supply and a plasma-cutting service. Send drawings, quantities, tolerances and edge preparation for your parts. Corten plate can be cut by plasma or oxy-fuel and welded with a qualified procedure. Ask for weathering-type filler metal where welds will be left bare outdoors, follow the mill’s advice on preheat, and send the grade and thickness with the drawing.
Testing, Inspection Documents and Traceability
| Requirement | What to identify in the order |
|---|---|
| Mill test certificate | EN 10204 3.1 showing brand and grade, heat number, chemistry and mechanical properties |
| Impact test | Charpy test temperature and minimum energy, if required |
| Ultrasonic test | Standard and acceptance class, if required |
| Traceability | Heat and plate number transferred to cut pieces |
See the company’s Quality Policy for its published policy.
Source S 355JOW Corten Plates from Champak Industries
Champak Industries’ company profile records its establishment in Mumbai in 1978 and its stockist, import and export activities. S 355JOW Corten Plates can be requested together with other plates in the Corten Plates range.
What Determines the Quotation?
Grade and brand, thickness, plate size, quantity, cutting, testing and packing all affect the quotation. Say whether pricing is needed per kilogram, per plate or per finished piece.
Packing, Dispatch and Export Requirements
Give the delivery address, required date and unloading constraints. For export orders, include the destination port, delivery terms and document list.
S 355JOW Corten Plates: Frequently Asked Questions
01What is S 355JOW Corten Plates?
S355J0W is a weathering structural steel to EN 10025-5, listed here with its Corten A, Corten B, SAILCOR, IRS M41 and JIS SPA-H equivalent names, for bare welded, bolted and riveted structures.
02What do the letters in S355J0W mean?
S is structural steel, 355 is the minimum yield strength in MPa for thin plate, J0 means impact tested at 0 °C (J2 at −20 °C), and W means weather resistant.
03Which names does the page list for the same type of steel?
CORTEN-A, CORTEN-B, SAILCOR, SAIL-COR, S355J0WP, S355J2WP, S355J0W, S355J2W, IRSM41-97, IRS-M41 and JIS G3125 SPA-H.
04What is the scope of Corten A and Corten B?
The page says Corten A applies to plates up to 12.5 mm thick and Corten B to plates up to 50 mm.
05Where are rules for using the steel unprotected?
The page points to EN 10025-5 and the German DASt Guideline 007 for basic recommendations on using the steel in the unprotected condition.
06Can S355J0W be welded?
Yes, 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 and heat input.
07Which certificate should I request?
An EN 10204 3.1 mill test certificate showing the brand and grade, heat number, chemistry and mechanical properties, plus impact results where you specify a test temperature.
08Can another brand replace S355J0W?
Brands of the same class are comparable, not identical. Chemistry, toughness, thickness range and processing advice differ by mill, so confirm any substitution with your engineer.
09Can S355J0W plate be cut to size?
Yes. Champak Industries lists full and part plate and profile supply and a plasma-cutting service; send drawings, quantities and tolerances with your enquiry.
10How do I get a price and delivery date?
Send the grade, thickness, size or cutting drawing, quantity, destination and required date through the enquiry form below, by WhatsApp or by phone.