Weathering steel also known by its brand name COR-TEN is used in building bridges because of its unique property which eliminated the work of painting. weathering steel goes through an oxidation process for 2 to 6 years and forms a patina (rust-like appearance) which acts as a coating against the atmosphere. The bridges built can last up to 120 years. Also, the construction process is quickly completed without the need for painting.
Weathering Steel Grades and Specification
| Designation | Thickness | Thickness (mm) |
|---|---|---|
| COR-TEN O | Hot-rolled sheet and plate | 1.6 ≦ t ≦ 76 |
| Cold-rolled sheet: | 0.4 ≦ t ≦2.3 | |
| Bar | 5.5 ≦ t ≦ 44 | |
| COR-TEN 490A/B/C | Hot-rolled sheet and plate | 6 ≦ t ≦ 50 |
| COR-TEN 570 | Hot-rolled sheet and plate | 6 ≦ t ≦ 50 |
| COR-TEN A | Hot-rolled sheet and plate | t ≦ 12.7 |
| COR-TEN B | Hot-rolled sheet and plate | t ≦ 200 |
| COR-TEN C | Hot-rolled sheet and plate | t ≦ 25 |
Weathering Steel Composition
Table of contents
- Weathering Steel Aging Of Rust
- Weathering Steel For Different Industries
- Benefits Of Weathering Steel
- Weathering Steel In Bridge Construction
- Welding Consumables For Black Corten Steel
- Mechanical Properties Of Weathering Steel
- Corten Metal Elastic Modulus
- Corten Weathering Steel Coefficient of Thermal Expansion
- Corten Steel Surface Treatment
- Pre Weathered Corten Steel Fatigue Test Result
- Structural Sections Size Range of Weathering Steel
Weathering Steel Aging Of Rust
Weathering Steel For Different Industries
Structure and Bridges
- Piles for foundation
- Tubes for circular piers
- Plates for Piers
- Plates for I beam / girder
- Plates for Cross members
Heavy transport
- Trailer chassis
- Containers
- Timber trailers
- Railroad wagons
- Offshore cranes
Process industry
- Heat Exchangers
- Chimneys
- Sulfur Resistant
Buildings
Arts and parks
- Low maintenance
- Cost reduction
- Environmental benefits
- Attractive appearance
- Speed of construction
- Enhanced safety
Weathering Steel in Bridge Construction
| Aspect | Weathering steel | Painted nonalloyed steel | Reinforced concrete |
|---|---|---|---|
| Initial Costs Of Construction | Project-Specific | Project-Specific | Project-Specific |
| Time Of Construction | Much Better | Better | Worse |
| Life Cycle Costs | Better | Worse | Worse |
| Maintenance Works Constraints | Better | Worse | Worse |
| Sustainability | Much Better | Better | Worse |
| Appearance | Uniform Rust | Paint | Grey |
Welding Consumables For Black Corten Steel
| Process | No | Option 1 | Option 2 | Option 3 |
|---|---|---|---|---|
| SMAW – Shielded metal arc welding | 111 | 0.5 % Cu and other alloy elements | 2.5 % Ni | 0.5 % Mo, 1 % Ni |
| SAW – Submerged arc welding | 121, 122 | 0.5 % Cu and other alloy elements | 2 % Ni | 0.5 % Mo, 1 % Ni |
| GMAW – Gas metal arc welding | 135 | 0.5 % Cu and other alloy elements | 2.5 % Ni | 0.5 % Mo, 1 % Ni |
| FCAW – Flux-cored arc welding | 136 | 0.5 % Cu and other alloy elements | 2.5 % Ni | 0.5 % Mo, 1 % Ni |
Mechanical Properties Of Weathering Steel
| Designation | Product | Thickness mm | Yield point N/mm2 |
Tensile strength N/mm2 |
Thickness mm | Elongation % |
|---|---|---|---|---|---|---|
| COR-TEN A | Hot-rolled sheet and plate | ≦12.7 | 345≦ | 485≦ | 22≦ | |
| 18≦ | ||||||
| COR-TEN B | ≦100 | 345≦ | 485≦ | 21≦ | ||
| 18≦ | ||||||
| 100 over t≦125 | 315≦ | 460≦ | 21≦ | |||
| 125 over t≦200 | 290≦ | 435≦ | 21≦ | |||
| COR-TEN C | ≦25 | 415≦ | 550≦ | 21≦ | ||
| 16≦ |
| COR-TEN O | 19.3~20.7×104 |
|---|
Corten Weathering Steel Coefficient of Thermal Expansion
| Name | Up to 100˚C | Up to 200˚C | Up to 300˚C | Up to 400˚C | Up to 500˚C | Up to 600˚C |
|---|---|---|---|---|---|---|
| COR-TEN O | 10.5 | 11.8 | 12.8 | 13.4 | 13.5 | 13.6 |
Corten Steel Surface Treatment
| Coating 1 | Rust Accelerant |
|---|---|
| Coating 2 | Rust Neutralizer |
| Coating 3 | Rust Sealant |
Pre Weathered Corten Steel Fatigue Test Result
Structural Sections Size Range of Weathering Steel
| Size From | To | |
|---|---|---|
| A606 Steel Beams | 356 x 171 x 45 | 1016 x 305 x 487 |
| A606 Steel Columns | 203 x 203 x 46 | 356 x 406 x 634 |
ASTM (American) Standard of Corten Steel at a Glance
| ASTM | Product form | Yield Strength (min) | Tensile Strength (min) |
|---|---|---|---|
| ASTM A588 | Angles, channel, beams, Plates, Bars | 50ksi | 70ksi |
| ASTM A242 | Plates- | 50ksi | 70ksi |
| ASTM A606-4 | Hot, cold rolled sheets, strips and coils | 50ksi | 70ksi |
| ASTM A847 | Cold-formed welded square, rectangular tubing and pipe | 50ksi | 70ksi |
| ASTM A709-50W | Structural shapes, plates and bars | – | – |
| ASTM A871-65 | Structural steel plate | 65ksi | 80ksi |
| ASTM A572-65 | Plates | 65ksi | 80ksi |
Types of Corten Steel Products
Weathering Steel Plate
Corten Steel Coil
Corten Steel Edging
Corten Steel Planter
Perforated Corten Steel Sheet
Corten Steel Siding
Corten Steel Pergola
Corten Steel Slats
Corten Steel Privacy Screens
Corten Corrugated Sheet
Corten Steel Black Sheet
Corten Steel Beams
Corten Steel Pipe
Corten Tube
Corten Steel Square Tube
Applications of Weathering Steel
- Rail
- Bridges
- Sculptures
- Offshore
- Architectural applications