Products Description
The ASTM standard designation A 242 refers to Cor-Ten A, which is applicable to steel plates with thicknesses up to 12.7 mm, while the newer ASTM grades, such as A 588, represent Cor-Ten B, used for thicknesses greater than 12.7 mm.
Welding of Cor-Ten steel can be performed using various methods, including gas shield welding, spot welding, or submerged arc welding, with the specific choice depending on the thickness of the steel. Selecting the appropriate welding method is essential to ensure that the rusting process develops consistently with the rest of the structure.
Although Corten A and Corten B share similar properties, Cor-Ten A alloys generally contain a higher phosphorus content, which provides enhanced corrosion resistance.
Corten A Chemical Composition
| Grade | C [%] | Si [%] | Mn [%] | P [%] | S [%] | AI [%] | Cu [%] | Cr [%] | Ni [%] |
|---|---|---|---|---|---|---|---|---|---|
| Corten A | 0.12 | 0.25/0.75 | 0.20/0.50 | 0.07/0.15 | 0.030 | 0.015/0.06 | 0.25/0.55 | 0.50/1.25 | 0.65 |
Corten A Mechanical Properties
| Grade | Thickness (mm) Strip Products | Plate Products | Yield Strength RelN/mm² Minimum |
Tensile Strength RmN/mm² Minimum |
Elongation Aso% Minimum |
|---|---|---|---|---|---|
| Corten A | 2-12 | 6-12 | 345 | 485 | 20 |
Corten B Chemical Composition
| Grade | C [%] | Si [%] | Mn [%] | P [%] | S [%] | AI [%] | Cu [%] | V [%] | Cr [%] | Ni [%] |
|---|---|---|---|---|---|---|---|---|---|---|
| Corten B | 0.19 | 0.30/0.65 | 0.80/1.25 | 0.035 | 0.030 | 0.02/0.06 | 0.25/0.40 | 0.02/0.1 | 0.40/0.65 | 0.40 |
Corten B Mechanical Properties
| Grade | Thickness (mm) Strip Products | Plate Products | Yield Strength Rel N/mm² Minimum | Tensile StrengthRm N/mm² Minimum | Elongation A50 % Minimum |
|---|---|---|---|---|---|
| Corten B | 2 – 13 | 6 – 40 | 345 | 485 | 19 |
Corten A Thickness Range
| Thickness Range | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4mm | 5mm | 6mm | 7mm | 8mm | 9mm | 10mm | 12mm | 14mm | |
| Corten A | x | x | x | x | x | x | x | ||
| Corten B | x | x | x | x | x | x | x | ||
| S355JOWP | x | x | x | x | x | x | x | ||
| S355JOW | x | x | |||||||
| S355J2W+N | x | x | x | x | x | x | x | ||
| S355J2WP+N | x | x | |||||||
| PATINAX 355P | x | x | x | x | x | ||||
Corten B Thickness Range
| Thickness Range | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 15mm | 16mm | 18mm | 20mm | 25mm | 30mm | 35mm | 40mm | 50mm | 60mm | |
| Corten A | ||||||||||
| Corten B | x | x | x | x | x | x | x | x | x | x |
| S355JOWP | x | |||||||||
| S355JOW | ||||||||||
| S355J2W+N | x | x | x | x | x | x | x | x | x | x |
| S355J2WP+N | x | x | x | x | x | x | ||||
| PATINAX 355P | x | x | x | x | x | x | x | x | x | x |
Corten A and Corten B are both weathering steel grades designed to develop a protective rust-like patina, they differ in terms of chemical composition, tensile strength, weldability, and specific applications.
Corten A is favored for its rust aesthetic and architectural applications, while Corten B is chosen for its enhanced strength and corrosion resistance in structural designs.
