Products Description
G350 Az150g Galvalume Steel Coil is a premium hot‑dip aluminium‑zinc coated steel product, featuring a G350 high‑strength substrate (minimum yield strength 350 MPa) and a 150 g/m² AZ150 55% Al‑Zn‑Si coating. Manufactured to ASTM A792, JIS G3321 and EN 10346 standards, this high‑strength galvalume coil delivers outstanding structural performance, superior corrosion resistance and excellent heat reflectivity-ideal for roofing, wall cladding, structural framing, silos and industrial equipment. As a reliable galvalume steel coil supplier, GNEE STEEL provides factory‑direct G350 Az150g coils with strict quality control, competitive pricing and on‑time global delivery.
Key Advantages of G350 Az150g Galvalume Steel Coil
High Structural Strength: G350 grade offers minimum 350 MPa yield strength, ensuring excellent load‑bearing capacity and structural stability for long‑span roofing, purlins and heavy‑duty structures.
Superior Corrosion Protection: The AZ150 (150 g/m²) 55% Al‑Zn‑Si coating combines aluminium's barrier effect and zinc's sacrificial protection, providing 3–6 times longer life than conventional galvanized steel. Performs reliably in coastal, humid and industrial environments.
Excellent Heat Resistance & Energy Savings: Withstands continuous temperatures up to 315°C without discoloration or coating degradation. Reflects ~70% of solar radiation, reducing building cooling costs by 15–20%.
Good Formability & Paint Adhesion: Smooth silver‑white spangle (regular/zero spangle available) enables easy bending, stamping and welding. The coating bonds tightly with paints, supporting long‑life pre‑painted applications.
Long Service Life & Low Maintenance: Delivers 25–30 years of service in atmospheric conditions, minimizing repainting and repair costs for industrial and commercial projects.
Technical Specifications of G350 Az150g
All coils are produced on advanced continuous hot‑dip lines and inspected via SGS/BV to meet global standards.
| Parameter | Specification | Tolerance | Remarks |
|---|---|---|---|
| Grade | G350 (S350GD+AZ) | - | High‑strength structural grade |
| Coating | 55% Al‑43.4% Zn‑1.6% Si, AZ150 | ±10% | 150 g/m² total, both sides |
| Thickness | 0.20–2.0 mm | ±0.02 mm | Customizable |
| Width | 600–1500 mm | ±2 mm | 914/1000/1219/1500 mm common |
| Coil ID | 508 mm / 610 mm | - | Standard export size |
| Coil Weight | 3–8 tons | ±5% | Customizable |
| Yield Strength | ≥350 MPa | ±15 MPa | G350 requirement |
| Tensile Strength | 400–540 MPa | ±20 MPa | - |
| Elongation (A80) | ≥18% | ±2% | Ensures adequate formability |
| Surface | Regular spangle / Zero spangle, Chromated / AFP / Oiled | - | Anti‑fingerprint optional |
Coating Chemical Composition
| Element | Content | Function |
|---|---|---|
| Aluminum (Al) | 55% | Barrier corrosion protection |
| Zinc (Zn) | 43.4% | Sacrificial anode protection |
| Silicon (Si) | 1.6% | Improves coating adhesion |
Aluzinc composition
● Cold rolled steel coil
● Aluzinc paiting layer
● Anti fingerprinting, chromate, OIled,non-oiled
3)Surface treatment:
Chromated / skin pass/ oiled/Anti-finger-AFP
4)Aluzinc Characteristic
a. Economy:
Because the density of 55% AL-Zn is lower than that of Zn, the area of the galvanized steel sheet is more than 3% larger than that of the galvanized steel sheet with the same weight and the same thickness of the gold coating.
b. Easy to paint
The aluminum-zinc plate has an excellent adhesion between the paint, and the color can be painted without pretreatment and weathering.
The coating adhesion of the gold-plated layer of aluminum-zinc steel sheet is relatively good, so it can also be directly coated on advertising boards and general boards without pretreatment such as weathering.
Test
AZ coating test,
Tensile Test,
Salt Spray Test,
Hardness Test,
Thickness Test
Frequently Asked Questions (FAQ)
Q1: What does G350 Az150g mean?
A: G350 = minimum yield strength 350 MPa (high‑strength grade); Az150g = 150 g/m² 55% Al‑Zn‑Si coating (both sides total).
Q2: Is G350 Az150g suitable for coastal areas?
A: Yes. The AZ150 coating provides excellent salt‑spray resistance. For severe coastal environments, we recommend AZ150+ anti‑fingerprint (AFP) treatment.
Q3: Can G350 Az150g be bent or welded?
A: Yes. The grade offers balanced strength and ductility. Standard bending, stamping and welding processes are applicable; we can provide processing guidelines.
Q4: What is the MOQ for G350 Az150g galvalume coil?
A: Standard MOQ is 25 tons (one full coil). Trial orders of 10–25 tons can be negotiated based on inventory.
Q5: What is the lead time?
A: Standard specifications: 15–20 days after deposit. Custom sizes: 20–25 days. Urgent orders: 10–15 days if stock is available.
Q6: Does it need pre‑treatment before painting?
A: No. The AZ150 coating has excellent paint adhesion and can be painted directly. Chromated or AFP surface options further improve paint durability.
Q7: What is the standard export packaging?
A: Waterproof paper + PE film + metal strapping + edge protectors; ensures safe sea/land transport. Wooden pallets are optional.
Q8: Can I get samples of G350 Az150g galvalume coil?
A: Yes. Free samples (1–2 meters) are available for quality testing; customers only cover shipping cost. Test reports can be provided with samples.
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