Keluli Corten
Corten Steel includes a variety of international grades such as ASTM A242, ASTM A588, S355J2W, and SPA-H, each designed for different structural and environmental requirements. These grades share a common feature: excellent atmospheric corrosion resistance through the formation of a protective rust patina, making them ideal for long-term outdoor applications.
- Penerangan
Keluli Corten, juga dikenali sebagai keluli luluhawa, is a group of low-alloy steels designed to form a stable rust-like protective layer when exposed to the atmosphere. This protective patina reduces further corrosion and eliminates the need for painting in many outdoor applications.
It is widely used in architecture, jambatan, landskap, kontena penghantaran, and outdoor sculptures due to its durability and distinctive appearance.
Common Corten Steel Grades
Corten Steel is typically classified into several standardized grades depending on regional standards and chemical composition.
Gred Standard ASTM
| Gred | Standard | Ciri -ciri utama |
|---|---|---|
| ASTM A242 | Structural Weathering Steel | Kekuatan tinggi, rintangan kakisan atmosfera yang baik |
| ASTM A588 | High-Strength Low-Alloy Steel | Improved corrosion resistance for structural applications |
| Jenis ASTM A606 4 | Sheet and Strip Weathering Steel | Excellent formability, used for thinner products |
DALAM / European Standard Grades
| Gred | Standard | Equivalent Characteristics |
| S355J2W | DALAM 10025-5 | Weather-resistant structural steel |
| S355J0W | DALAM 10025-5 | Good low-temperature toughness |
| S355K2W | DALAM 10025-5 | Enhanced impact resistance |
Common Commercial Equivalent Grades
| Gred | Penerangan |
| SPA-H | Japanese weathering steel for containers and structures |
| SPA-C | Improved corrosion-resistant container steel |
| Q355NH | Keluli struktur luluhawa Cina |
| Q235NH | Low-strength weathering steel for general use |
Ciri Komposisi Kimia
Although each grade varies slightly, Corten Steel generally contains alloying elements that improve corrosion resistance:
| unsur | Fungsi |
| Tembaga (Cu) | Enhances rust layer stability |
| Chromium (Cr) | Meningkatkan rintangan pengoksidaan |
| nikel (Dalam) | Meningkatkan keliatan dan rintangan kakisan |
| Fosforus (P) | Meningkatkan pembentukan patina |
| silikon (Dan) | Strengthens corrosion protection layer |
These elements work together to form a dense, adherent oxide layer that protects the steel surface from deeper corrosion.
Performance Features of Corten Steel Grades
- Rintangan kakisan atmosfera yang sangat baik
- Self-protecting rust patina formation
- Kekuatan struktur yang tinggi
- Hayat perkhidmatan yang panjang dalam persekitaran luar
- Keperluan penyelenggaraan yang rendah
- Good weldability and machinability
Aplikasi Biasa
Corten Steel grades are used in a wide range of industries:
- Bridge structures and highways
- Building facades and architectural panels
- Landscape and garden edging systems
- Shipping containers and railway vehicles
- Arca luar dan pemasangan seni
- Industrial equipment exposed to weather
- Retaining walls and infrastructure projects
