Zinc Aluminum Alloy Coated Steel
55% Al-Zn Coated Steel
Superior anti-corrosion performance for long-lasting durability. Zinc aluminum alloy coating provides edge protection and self-healing properties. Perfect for roofing sheets, structural components, and outdoor applications. Get factory price and fast delivery.
- Email：admin@zhongtangsteel.cn
- WhatsApp：+86 15864006163
1.Are you a manufacturer or just a trader?
We are a manufacturer. We can provide high quality products at competitive prices. Our company also has a trade department. Our company specialized in steel products more than 10 years, so we have established cooperative relationship with many steel enterprises. We can provide many types and specifications of steel products.
2.Could you supply samples?
Sure, samples can be provided free of charge, and buyers pay the freight of the sample.
3.How long does it take you to prepare the goods?
It takes seven to ten days for products under 25 tons, and within 15 days for products of 25-100 tons. Special specifications and large quantity of products will be discussed separately.
4. What is your delivery time?
The time of delivery is usually around 15-20 days. We can send out in 2 days, if it has stock.
5.What is your payment terms?
Our usual payment term is 30% deposit, and rest before delivery. L/C is also acceptable. EXW, FOB, CFR, CIF.
Description
Zinc Aluminum Alloy Coated Steel is a high-performance coated steel product manufactured by applying a zinc-aluminum alloy coating to a steel substrate through a continuous hot-dip process. This advanced coating provides superior corrosion resistance, excellent formability, and enhanced durability compared to conventional galvanized steel.
1.Common Product Types
Galvalume / Aluzinc: Coating composition – 55% aluminum, 43.4% zinc, 1.6% silicon (55% Al-Zn)
ZAM: Coating composition – zinc, aluminum and magnesium (e.g., Zn-6%Al-3%Mg)
GL (Galvalume): Aluzinc-coated steel sheet
2.Product Structure
| Structure Layer | Description |
|---|---|
| Top Coat (Optional) | Pre-coated layer (PPGL) or anti-fingerprint treatment |
| Chemical Passivation Layer | Chromate-free or chromated passivation for enhanced corrosion resistance |
| Zn-Al-Mg Alloy Coating | 55% Al-Zn or Zn-Al-Mg alloy coating |
| Substrate | Cold-rolled steel (DX51D, DX52D, S250GD+Z, etc.) |
| Item | Specification Range |
|---|---|
| Thickness | 0.12 mm – 3.0 mm |
| Width | 600 mm – 1500 mm (customizable up to 1800 mm) |
| Coil Weight | 3 – 15 tons per coil |
| Coating Type | 55% Al-Zn (Galvalume), Zn-Al-Mg (ZAM) |
| Coating Weight | AZ30 – AZ200 (30–200 g/m²) |
| Substrate Grade | DX51D, DX52D, DX53D, S250GD – S550GD |
| Surface Treatment | Passivation, anti-fingerprint, oiled, non-oiled |
| Surface Finish | Regular bright surface, zero spangle, mini spangle |
4.Product Features & Advantages
| Features | Advantage Description |
|---|---|
| Excellent Corrosion Resistance | Corrosion resistance is 2–6 times that of ordinary galvanized steel; salt spray test can last more than 1000 hours. |
| Good High Temperature Resistance | Can be used continuously at 300℃ without obvious discoloration. |
| Excellent Formability | Strong coating adhesion; suitable for stamping, bending, deep drawing, roll forming, etc., without chalking or peeling. |
| Outstanding Scratch Resistance | High coating hardness and good surface wear resistance, reducing scratches during processing. |
| Cut Edge Self-Healing Ability | Zn-Al-Mg coating forms a dense protective film at cut edges to prevent red rust. |
| Aesthetic & Durable | Bright silver-white metallic luster for long-lasting appearance. |
| Environmental Friendly | Complies with RoHS directives; chromate-free eco-friendly passivation available upon request. |
5.Quality Standards & Certifications
| Standard System | Standard No. |
|---|---|
| Chinese Standard | GB/T 14978 – 2015 |
| American Standard | ASTM A792 |
| European Standard | EN 10346 / EN 10215 |
| Japanese Standard | JIS G3321 |
Certificates:
ISO 9001, ISO 14001, CE Certification, SGS Test Reports
6.Packaging & Transportation
Middle layer: Circumferentially wrapped with galvanized iron sheet or steel plate
Outer layer: Reinforced with steel strips longitudinally and circumferentially
Bottom: Fumigated wooden pallets for easy forklift loading and unloading
FOB (Tianjin / Shanghai / Qingdao and other ports), CIF, CFR, EXW
T/T (Telegraphic Transfer), L/C (Letter of Credit)
7–15 days for regular products; 20–45 days for customized products
