Keluli Karbon Beraluminium
Aluminized Carbon Steel combines the structural strength of carbon steel with the protective benefits of an aluminum-silicon coating. Its excellent heat resistance, rintangan pengoksidaan, perlindungan kakisan, and thermal reflectivity make it an ideal material for applications that operate in elevated-temperature environments while requiring long-term durability.
- Penerangan
Penerangan
Aluminized Carbon Steel is a carbon steel substrate coated with an aluminum-silicon alloy through a continuous hot-dip process. The coating combines the strength and formability of carbon steel with the excellent heat resistance and corrosion protection of aluminum. Because of its unique properties, this material is widely used in automotive exhaust systems, peralatan pemanasan industri, and high-temperature structural components.
Komposisi Kimia
The performance of aluminized carbon steel is mainly determined by the aluminum-silicon coating and the carbon steel base material.
Typical Coating Composition
| unsur | kandungan (%) |
|---|---|
| aluminium (Al) | 89–95 |
| Silikon (Dan) | 5–11 |
| besi (Fe) | Baki |
Silicon improves the adhesion between the coating and the steel substrate while reducing brittleness during forming and welding operations.
Typical Base Steel Composition
| unsur | kandungan (%) |
| Karbon (C) | ≤0.25 |
| Mangan (Mn) | 0.30–1.50 |
| Fosforus (P) | ≤0.04 |
| Sulfur (S) | ≤0.05 |
| besi (Fe) | Baki |
The exact composition may vary depending on the steel grade and application requirements.
Sifat Mekanikal
| Harta benda | Nilai Biasa |
| Kekuatan Hasil | 140–300 MPa |
| Kekuatan Tegangan | 270–450 MPa |
| Pemanjangan | 20–40% |
| Kekerasan | 55–85 HRB |
These properties provide a good balance between strength, kemuluran, dan kebolehkilangan.
Ciri-ciri Prestasi Utama
Rintangan Haba Cemerlang
The aluminum-rich coating forms a stable oxide layer that protects the steel surface from scaling and oxidation. Continuous service temperatures can exceed those of galvanized steel, making the material suitable for exhaust and thermal applications.
Superior Oxidation Resistance
When exposed to elevated temperatures, the coating develops a dense aluminum oxide film that slows metal degradation and extends service life.
Good Corrosion Protection
The aluminum coating acts as a barrier against moisture and atmospheric contaminants. Berbanding dengan keluli karbon biasa, corrosion resistance is significantly improved.
Pemantulan Terma Tinggi
The bright aluminum surface reflects radiant heat effectively, reducing heat absorption and improving thermal efficiency in industrial equipment.
Kebolehbentukan Cemerlang
Aluminized carbon steel can be stamped, bengkok, rolled, and fabricated using conventional processing methods while maintaining coating integrity.
Perbandingan Prestasi
| Harta benda | Keluli Karbon Beraluminium | Keluli Tergalvani |
| Coating Material | Aluminum-Silicon | Zink |
| Rintangan Haba | Cemerlang | Sederhana |
| Rintangan Pengoksidaan | Cemerlang | Baik |
| Pemantulan Terma | tinggi | Sederhana |
| Rintangan Kakisan | Very Good | Baik |
| High-Temperature Applications | sesuai | Terhad |
Common Industrial Applications
- Automotive exhaust pipes and mufflers
- Perisai haba
- Ketuhar dan relau industri
- Peralatan pemanasan gas
- Cerobong dan sistem asap
- Panel penebat haba
- Peralatan pengeringan industri
- Penukar haba
- Sistem pengudaraan
