Products Description
S320GD+AZ50 Galvalume Steel Sheet is a high-strength structural hot-dip aluzinc steel sheet with S320GD structural substrate and **AZ50 standard ultra-thin aluminum-zinc coating. It balances high mechanical strength, basic anti-corrosion performance, low cost and excellent processing performance, being a cost-effective core building and industrial metal material supplied by GNEE STEEL. Widely used for secondary processing, interior structural parts, common roofing, enclosure panels and general industrial components, this grade is favored by global buyers for stable quality and economical cost.
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S320GD：
S = Structural steel, specially designed for load-bearing and structural use;
320 = Minimum yield strength reaches 320MPa, with higher rigidity and compression resistance than conventional low-strength galvalume steel;
GD = Hot-dip galvanized / galvalume base material, with stable coating adhesion and excellent forming property.
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AZ50 stands for aluzinc coating weight:
AZ represents 55% aluminum + 43.5% zinc + 1.5% silicon alloy galvalume coating;
50 means the total double-sided coating weight is 50g/m², a lightweight and economical coating specification. It provides daily anti-rust and oxidation protection, suitable for dry, indoor and mild outdoor environments, effectively controlling raw material costs on the premise of meeting basic service life requirements.
Aluzinc Coating Specification Chart
| Coating Code | Total Coating Weight | Total Coating Thickness | Approx. Single Side Thickness(μm) | Applicable Standards |
| (g/m², both sides) | (μm, theoretical) | |||
| AZ50 | 50 | 13.16 | 6.58 | GB/T 14978, EN 10346, ASTM A792 |
| AZ70 | 70 | 18.42 | 9.21 | GB/T 14978, EN 10346, ASTM A792 |
| AZ100 | 100 | 26.32 | 13.16 | GB/T 14978, EN 10346, ASTM A792 |
| AZ150 | 150 | 39.47 | 19.74 | GB/T 14978, EN 10346, ASTM A792 |
| AZ180 | 180 | 47.37 | 23.68 | GB/T 14978, EN 10346, ASTM A792 |
| AZ200 | 200 | 52.63 | 26.32 | GB/T 14978, EN 10346, ASTM |
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Surface structural
S320GD+AZ50 Galvalume Steel Sheet is continuously hot-dip produced with integrated molding technology. The compact aluzinc alloy layer is tightly combined with the high-strength steel substrate. The surface presents uniform fine spangle, smooth and flat. It supports bending, cutting, stamping, rolling and other deep processing without coating cracking or peeling. As an economical high-strength galvalume sheet, it is the optimal choice for mass procurement and cost-sensitive projects.
Professional Technical Specification Table
| Inspection Item | Standard Parameter | Execution Standard |
|---|---|---|
| Steel Grade | S320GD+AZ50 | EN 10346 |
| Minimum Yield Strength | ≥320 MPa | EN 10346 |
| Tensile Strength | 380–550 MPa | EN 10346 |
| A50 Elongation | ≥16% | EN 10346 |
| Coating Type | 55%Al-Zn-Si Galvalume | ASTM A792 |
| Coating Weight | AZ50 (50g/㎡ Double Side) |
Custom available |
| Thickness Range | 0.18–2.0 mm | Cold rolled substrate |
| Width Range | 600–1500 mm | Fixed & custom size |
| Surface Finish | Regular spangle, oiled / non-oiled | Industrial grade |
| Passivation | Chromate-free environmental treatment | Global export standard |
Core Product Advantages
- High Structural Strength
S320GD high-strength substrate greatly improves wind resistance, pressure resistance and structural stability, suitable for light load-bearing structural components.
- Economical AZ50 Coating
Lightweight AZ50 coating meets daily anti-corrosion demands, reduces unit material cost, and improves project cost performance.
- Excellent Processability
Good toughness and coating binding force, adaptable to various secondary processing technologies, no damage to the surface layer.
- Flat & Beautiful Surface
Uniform silver spangle surface, clean and neat, can be used directly or as base material for painting and color coating.
- Stable Weather Resistance
Aluminum-zinc alloy coating has better heat resistance and oxidation resistance than ordinary galvanized sheet, suitable for long-term indoor and mild outdoor use.
- Strict Quality Control
Full-process quality inspection, precise size tolerance control, to ensure every batch of S320GD+AZ50 steel sheet meets export standards.
Main Application Scenarios
Construction: Light steel structure purlins, indoor wall panels, temporary enclosure, ordinary factory roofing
Hardware Processing: Metal parts, cabinet shells, storage racks, mechanical accessories
Home Appliance: Internal structural parts, back plates and non-corrosive household metal components
Packaging & Logistics: Anti-rust metal backing plate, industrial packaging steel plate
Light Industry: Greenhouse auxiliary materials, farm simple buildings, daily hardware processing
FAQ
1.What is S320GD meaning in steel grade?
S320GD is a European standard structural hot-dip coated steel grade, with 320MPa minimum yield strength, designed for structural and load-bearing purposes.
2.What does AZ50 mean on galvalume sheet?
AZ50 refers to 55% aluminum-zinc-silicon alloy coating with a total double-sided coating weight of 50 grams per square meter, an economical light coating.
3.What is the difference between AZ50 and AZ100?
AZ50 is lighter and lower in cost for mild environments; AZ100 has thicker coating and stronger corrosion resistance for coastal and humid areas.
4.Is S320GD+AZ50 suitable for outdoor use?
It is suitable for dry and low-corrosion outdoor environments. For rainy, coastal or high-humidity areas, it is recommended to choose higher AZ coating weight.
5.Can S320GD+AZ50 be bent and deep processed?
Yes. The product has good ductility and coating adhesion, and can be freely bent, stamped and cut without peeling.
6.Do you provide free samples for quality checking?
GNEE STEEL can provide free small samples of S320GD+AZ50 galvalume steel sheet, you only need to afford the freight cost.
7.What is the production delivery time?
Regular sizes have 5–7 days fast delivery; customized specifications are about 15–25 working days according to quantity.
8.What export packaging do you use?
Adopt standard seaworthy export packaging: waterproof paper + plastic film + edge iron protection, to avoid damage during long-distance shipping.
S320GD+AZ50 Galvalume Steel Sheet is your ideal high-strength and low-cost aluzinc material for structural engineering and industrial processing. If you need the latest wholesale price, complete material data sheet, custom dimension solution or bulk order quotation, please feel free to send your detailed demands to us.
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