Large Spangle Hot Dipped Galvanized Steel Coil Z120 Z180 Z275 for Roofing, Ducting & Industrial Fabrication
Détails du produit
| Nom du produit: | Bobine d'acier galvanisé à chaud à grandes paillettes | Grade: | DX51D+Z / SGCC / ASTM A653 CS Type B |
|---|---|---|---|
| Couche de zinc: | Z80 / Z100 / Z120 / Z180 / Z275 | Surface: | Grande paillette |
| Épaisseur: | 0.3mm~4.0mm | Bord: | Bord de fraisage Bord fendu |
| Identifiant de la bobine: | 508 mm / 610 mm | Traitement de surface: | Chromé / Huilé / Sec |
| Mettre en évidence |
Large Spangle Galvanized Steel Coil,Hot Dipped Steel Coil Z275,Galvanized Steel Coil for Roofing |
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Description du produit
Large Spangle Hot Dipped Galvanized Steel Coil is manufactured through a continuous hot-dip galvanizing process, where steel strip is coated with molten zinc and cooled under controlled conditions to form distinctive crystal patterns known as large spangles.
Unlike zero spangle galvanized steel, large spangle GI coils feature a decorative zinc crystal appearance while maintaining excellent corrosion protection and mechanical strength. The unique surface texture makes the material popular for applications where both durability and visual appeal are required.
Available in various zinc coating weights ranging from Z80 to Z275, our large spangle galvanized steel coils meet international standards including EN 10346, ASTM A653, and JIS G3302. They are suitable for roll forming, bending, profiling, and other fabrication processes.
Whether used for roofing sheets, ventilation ducts, cable trays, or agricultural buildings, large spangle galvanized steel offers an economical balance between appearance, corrosion resistance, and service life.
Why Choose Large Spangle Galvanized Steel?
Not every project requires a perfectly smooth surface. Many customers prefer galvanized steel with visible zinc crystals because it offers several practical advantages.
Large spangle galvanized steel is commonly selected because it provides:
- Attractive metallic crystal appearance
- Stable zinc coating distribution
- Excellent outdoor corrosion resistance
- Lower maintenance requirements
- Reliable performance for roll forming
- Cost-effective protection compared with stainless steel
For manufacturers producing exposed metal components, the natural zinc crystal pattern creates an industrial finish without additional surface treatment.
✔ Distinctive Zinc Crystal Pattern
The large spangle surface forms naturally during zinc solidification, creating a bright metallic appearance that distinguishes it from minimized or zero spangle products.
✔ Long-Term Corrosion Protection
The zinc coating shields the steel from moisture, oxidation, and atmospheric corrosion, extending the product's service life.
✔ Excellent Fabrication Performance
Suitable for:
- Roll forming
- Folding
- Cutting
- Punching
- Welding (after proper surface preparation)
✔ Wide Zinc Coating Options
Different coating weights are available to match different environmental conditions.
| Item | Specification |
|---|---|
| Product Name | Hot Dipped Galvanized Steel Coil |
| Grade | SGCC / DX51D+Z / DX53D+Z |
| Standard | JIS G3302 / EN 10346 / ASTM A653 |
| Thickness | 0.3 – 4.0 mm |
| Width | 900 – 1500 mm |
| Zinc Coating | Z80 – Z275 |
| Surface | Zero Spangle / Regular Spangle |
| Surface Treatment | Oiled / Chromated / Passivated |
| Coil Weight | 3 – 10 Tons |
| Coil ID | 508 mm / 610 mm |
| Base Material | Cold Rolled Steel / Hot Rolled Steel |
Large spangle galvanized steel coils are suitable for projects where corrosion protection and surface appearance are equally important.
- Corrugated roofing sheets
- Ridge caps
- Roof flashing
- Steel fencing
- Wall cladding
- Air ducts
- Exhaust ducts
- HVAC accessories
- Cable trays
- Electrical cabinets
- Storage shelving
- Machine covers
- Grain storage systems
- Livestock buildings
- Greenhouse structures
- Farm equipment
Choosing the correct galvanized steel depends on the project environment and fabrication requirements.
For Roofing
Recommended:
- Z180
- Z275
- Large Spangle
Provides long-term outdoor protection and an attractive metallic appearance.
For Painting or Color Coating
Recommended:
- Zero Spangle
- Chromated Surface
Provides better paint uniformity.
For Humid Environments
Recommended:
- Z275
- Passivated Surface
Improves resistance against white rust.
For General Fabrication
Recommended:
- DX51D+Z
- Z120
Suitable for bending, profiling, and structural fabrication.
- Regular spangle → Standard industrial use
- Zero spangle → Painting and decorative applications
- DX51D → General forming
- DX53D → Better ductility and stamping performance
Large spangle galvanized steel is hot dipped galvanized steel with visible zinc crystal patterns formed naturally during the cooling process.
Neither is universally better. Large spangle is preferred for exposed architectural and industrial applications, while zero spangle is ideal for painting and decorative finishing.
No. Corrosion resistance mainly depends on the zinc coating weight rather than the spangle size.
- Z80–Z120: Indoor applications
- Z180: General outdoor construction
- Z275: Coastal and high-humidity environments
Yes. It can be painted after proper surface preparation, although zero spangle is generally preferred for applications requiring premium paint finishes.
Our products can be manufactured according to EN 10346, ASTM A653, JIS G3302, GB/T 2518, and other international standards.
Points forts du produit
Large Spangle Hot Dipped Galvanized Steel Coil Z120 Z180 Z275 for Roofing, Ducting & Industrial Fabrication Product Overview Large Spangle Hot Dipped Galvanized Steel Coil is manufactured through a continuous hot-dip galvanizing process, where steel strip is coated with molten zinc and cooled under ...
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