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Hot Dip Aluminized Steel is a high-performance steel designed for extreme environments. Through a hot-dip process, a dense coating rich in aluminum (typically ≥85% Al content) is formed on the surface of a high-quality substrate. This aluminum-silicon alloy coating provides exceptional resistance to high-temperature oxidation and corrosion, far surpassing conventional galvanized materials, performing particularly well in high-temperature sulfide environments. It is the ideal choice for automotive exhaust systems, industrial heat-resistant equipment, and high-temperature applications.
| Standard | ASTM / JIS / DIN / GB / EN |
| Grade | - USA (ASTM): ASTM A463 Type 1 (Aluminum-coated, Type 1) |
| - China (GB): GB ALDC | |
| - Japan (JIS): JIS SGLD | |
| - EU (EN): EN ASXXX | |
| Material | - Carbon Steel: Base steel is typically a low-carbon grade, coated with an aluminum-silicon alloy. |
| Sizes | Thickness: 0.5-3.0mm |
| Width: 600-1500mm |
Withstands high temperatures up to 600°C.
Aluminum-silicon coating resists oxidation and corrosion.
Exceptional High-Temperature Oxidation Resistance: Specifically designed for heat applications, the Aluminum-Silicon coating provides reliable protection against oxidation and heat corrosion at temperatures up to 677°C, far surpassing conventional galvanized steel.
Efficient Thermal Reflection Barrier: The coating reflects over 80% of radiant heat, making it an ideal material for ovens, furnaces, heat shields, and automotive exhaust systems, contributing to energy efficiency.
Reliable Durability and Corrosion Resistance: The aluminum-oxide film forms a dense barrier, offering long-term atmospheric and chemical corrosion resistance, especially in humid or harsh environments involving heat.
Cost-Effective High-Alloy Alternative: In many high-temperature and heat-resistant applications, aluminized steel provides performance comparable to high-grade stainless steel but at a significantly lower cost, reducing overall manufacturing expenses.
Automotive Industry: Exhaust manifolds, mufflers, exhaust pipes, catalytic converter housings.
Heat-Resistant Equipment: Industrial ovens, heat treatment furnaces, burner parts, heat exchangers.
Construction Sector: Fire doors, heat-resistant roofing panels.
Agriculture & Chemical Industry: Grain dryers, chemical production equipment.
Hot-dip aluminized steel is produced by immersing steel strip in a molten aluminum or aluminum-silicon bath. The substrate is cleaned and annealed in a reducing atmosphere. It is then dipped into a bath of pure aluminum or Al-Si alloy (typically 8–11% Si) at 680–720°C. The silicon improves coating adhesion and inhibits brittle Fe-Al intermetallic growth. After dipping, the strip is cooled and may be skin passed. The resulting coating is rich in aluminum (≥85% Al) and provides excellent heat resistance (up to 677°C) and corrosion protection.
Our products strictly adhere to ASTM and SAE standards. We conduct rigorous tests on coating composition, weight, adhesion, and high-temperature oxidation resistance, and can provide relevant test reports.
We offer flexible custom services:
Cut-to-length (sheets)
Slitting (coils)
Selection of different coating types (Type 1 / Type 2) and weights
Products are packaged with specialized moisture-proof and scratch-resistant materials according to their form (sheets or coils), ensuring excellent surface condition during transit. We work with professional and reliable logistics partners to ensure the products arrive safely at your designated port of destination. Shipments are available from major ports like Shanghai, Tianjin, delivering globally.
