Products
Contact Us
Aluminium Silicon Alloy Price
Keywords:
Category:
Product Details
Aluminium silicon alloy (Al-Si) is a key coating material used in aluminized steel production. It is not only a protective layer but also a functional alloy system that determines heat resistance, corrosion resistance, and coating stability in aluminized steel products.
In industrial markets, “Al-Si alloy price” is often discussed in relation to aluminized steel (Al-Si coated steel), silicon steel, and other silicon-containing steel materials. However, these materials are fundamentally different in composition, purpose, and cost structure.
1. What is Aluminium Silicon Alloy in Aluminized Steel?
Aluminium silicon alloy in aluminized steel is a hot-dip coating layer composed of aluminum and a controlled amount of silicon.
Typical composition:
- Aluminum (Al): 85–92%
- Silicon (Si): 8–12%
Functions of silicon:
- Controls reaction between aluminum and steel substrate
- Prevents brittle Fe-Al intermetallic growth
- Improves coating uniformity
- Enhances high-temperature oxidation resistance
- Stabilizes coating during forming and welding
2. Al-Si Coated Steel vs Silicon Steel (Electrical Steel)
These two materials are often confused but serve completely different industries.
Key Difference in Purpose
| Material Type | Main Function | Application |
|---|---|---|
| Aluminized Steel (Al-Si coating) | Surface protection (heat + corrosion resistance) | Exhaust systems, HVAC, furnaces |
| Silicon Steel (Electrical steel) | Magnetic performance | Transformers, motors |
3. Composition Comparison
| Item | Al-Si Coated Steel | Silicon Steel |
|---|---|---|
| Base Material | Carbon steel | Iron-silicon alloy |
| Silicon Content | 8–12% (coating layer only) | 1–4% (inside steel) |
| Aluminum Content | 85–92% (coating) | None or trace |
| Structure | Surface coating system | Bulk alloy material |
4. Performance Comparison
| Property | Al-Si Coated Steel | Silicon Steel |
|---|---|---|
| Heat Resistance | Very high | Medium |
| Corrosion Resistance | High | Low |
| Magnetic Properties | None | Excellent |
| Electrical Use | Not suitable | Core material |
| High-Temperature Stability | Excellent | Limited |
5. Why Al-Si Alloy is More Expensive Than Regular Coatings
The cost of aluminium silicon alloy coating is influenced by:
- High-purity aluminum material usage
- Controlled silicon alloying process
- Hot-dip coating technology requirements
- High-temperature production environment
- Strict surface quality control
Compared with zinc coatings (galvanized steel), Al-Si coatings are generally:
- More expensive
- More heat resistant
- More specialized for automotive and thermal systems
6. Comparison with Other Silicon-Related Steel Materials
| Material | Silicon Role | Cost Level | Application |
|---|---|---|---|
| Al-Si Coated Steel | Surface alloy coating | Medium–High | Exhaust, heat systems |
| Silicon Steel (Electrical) | Magnetic property control | High | Transformers, motors |
| Stainless Steel (e.g., 304/316) | Minor alloy element | Medium–High | General corrosion resistance |
7. Application Value of Al-Si Alloy Coating
Aluminium silicon alloy coating is mainly used where both heat and corrosion resistance are required:
- Automotive exhaust systems
- Catalytic converter housings
- Industrial furnaces and kilns
- HVAC heat-resistant ducts
- Thermal shielding components
Product Inquiry
Relevant Products
TIANJIN TEDA GANGHUA
Tel: +86 22 86896631
Phone: +86 15822676888
Fax: +86 22 86896632
E-mail: sales1@tedaganghua.com
Office Hours:Mon – Fri / 9:00 AM – 6:00 PM
Address:Beichen Industrial Area, Beichen District, Tianjin 300400 China
Room A3101, Section 2, No. 122, Dongting Road, Tianjin Development Zone
Leave a message online
Copyright © 2023 TIANJIN TEDA GANGHUA