Visible Regular Spangle – Distinct metallic crystal pattern for roofing and exposed panels.
55% Al-Zn Coating – Aluminum-zinc alloy layer for corrosion protection and heat reflectivity.
AZ30 to AZ180 Options – Customized coating weights for different project requirements.
Roll-forming Ready – Suitable for roofing sheets, corrugated panels and wall cladding.
Complete Export Documents – COO, MTC, export license and shipping documents available.
Regular spangle Galvalume steel coil is an aluminum-zinc coated steel product characterized by a visible crystalline surface pattern formed during solidification of the metallic coating.
The product is also commonly referred to as spangle Aluzinc coil, visible-spangle Galvalume coil or regular-spangle GL coil. Its metallic surface is widely used for roofing sheets, corrugated panels and other applications where the natural appearance of the Al-Zn coating remains visible.
A typical Galvalume coating contains approximately 55% aluminum, 43.4% zinc and 1.6% silicon by weight. This coating system combines the barrier protection of aluminum with the sacrificial protection of zinc.
Henan GDD supplies regular-spangle Galvalume steel coils in customized thicknesses, widths, steel grades, AZ coating weights, coil weights and surface treatments for roofing manufacturers, roll-forming factories, construction material distributors and industrial users.
| Item | Specification |
|---|---|
| Product Name | Regular Spangle Galvalume Steel Coil / Spangle Aluzinc Steel Coil |
| Coating Type | Hot Dip Aluminum-Zinc Alloy Coating |
| Typical Coating Composition | Approximately 55% Aluminum, 43.4% Zinc and 1.6% Silicon |
| Surface Appearance | Regular Spangle / Visible Metallic Crystal Pattern |
| Common Grades | DX51D+AZ, DX52D+AZ, S250GD+AZ, S280GD+AZ, S320GD+AZ, S350GD+AZ or Customized |
| Applicable Standards | ASTM A792/A792M, EN 10346, JIS G3321, GB/T or Customer Specification |
| Thickness | 0.12 mm – 2.00 mm or Customized |
| Width | 600 mm – 1250 mm or Customized |
| AZ Coating Weight | AZ30 – AZ180 or Customized |
| Common Coating Options | AZ50, AZ70, AZ100, AZ120, AZ150, AZ180 |
| Surface Treatment | Passivated, Chromated, Oiled, Dry, Anti-fingerprint or Customized |
| Surface Condition | Natural Metallic Spangle, Skin-passed or Customized |
| Coil ID | 508 mm / 610 mm or Customized |
| Coil Weight | 3 – 10 MT or Customized |
| Edge Condition | Mill Edge / Slit Edge |
| Processing Service | Slitting, Cut-to-length, Leveling, Corrugating and Roll-forming Support |
| Inspection | MTC, Dimension Check, AZ Coating Weight Test, Surface Inspection and Third-party Inspection |
| Applications | Roofing Sheets, Corrugated Panels, Wall Cladding, Agricultural Buildings, Warehouses and Industrial Fabrication |
| Available Documents | MTC, Certificate of Origin, Export License Where Required, Commercial Invoice, Packing List, Bill of Lading and Customs Documents |
| Packing | Waterproof Paper, Steel Cover, Edge Protection, Steel Straps and Seaworthy Export Packing |
| Trade Terms | EXW, FOB, CFR, CIF |
Available thicknesses, coating weights, mechanical properties and surface appearances may vary according to the selected grade, production standard and order quantity. Final specifications should be confirmed through the purchase order and Mill Test Certificate.
Regular spangle Galvalume coil is produced by immersing a steel substrate in a molten aluminum-zinc alloy coating and allowing the metallic coating to solidify under controlled production conditions.
During solidification, visible crystal structures develop across the coated surface. These patterns are commonly described in the steel industry as spangles.
Because the coating is an aluminum-zinc alloy rather than pure zinc, the visible pattern can technically be described as an Al-Zn crystalline spangle. However, international buyers commonly search for terms such as regular spangle Galvalume and spangle Aluzinc coil.
Regular-spangle Galvalume has clearly visible metallic crystal patterns across the coil surface. The exact size, shape and contrast of the spangle can vary according to coating chemistry, cooling speed, coating weight and manufacturing conditions.
This natural metallic appearance is especially popular for unpainted roofing sheets, warehouse roofs, agricultural buildings and industrial structures where the coating remains exposed after roll forming.
Customers requiring consistent visual appearance across a single project should confirm the acceptable spangle size and production batch before mass production.
A typical Galvalume coating contains approximately 55% aluminum, 43.4% zinc and 1.6% silicon by weight.
Aluminum contributes barrier protection and heat reflectivity, helping isolate the steel substrate from environmental exposure.
Zinc provides sacrificial protection around cut edges, scratches and locally exposed areas, while silicon helps control the coating reaction during the hot-dip process.
Regular spangle Galvalume has clearly visible metallic crystal patterns and is often selected when the natural metallic surface will remain exposed.
Minimized-spangle products have a more uniform surface with smaller visible crystal patterns. They can be preferred when a smoother appearance or subsequent coating process is required.
The choice should depend on final appearance, forming requirements, downstream coating, customer preference and project specification.
Galvanized steel coil primarily uses a zinc coating, while Galvalume uses an aluminum-zinc alloy coating.
Both products can display visible crystalline patterns, but the appearance, coating chemistry and corrosion behavior are different.
Galvalume is widely selected for roofing and wall systems because of its combination of corrosion protection, metallic appearance and heat reflectivity.
Galvanized steel remains widely used for ducts, fabrication, structural components and applications requiring conventional zinc-coated steel.
DX51D+AZ is commonly used for general forming, corrugated roofing sheets, wall panels and other roll-formed construction materials.
DX52D+AZ provides improved formability for products requiring more demanding bending and profiling.
These structural grades are suitable for building panels and profiles where higher mechanical strength is required.
S350GD+AZ provides higher yield strength and is commonly selected for high-strength roll-formed profiles and lightweight construction components.
Galvalume coating weight is commonly identified by an AZ designation. Common options include AZ50, AZ70, AZ100, AZ120, AZ150 and AZ180.
Lower coating weights may be suitable for indoor applications or products with limited environmental exposure.
AZ100, AZ120 and AZ150 are frequently considered for roofing sheets, wall panels and general outdoor building materials.
Heavier coating weights may be selected for more demanding service environments. Final selection should consider local climate, expected service period and applicable project requirements.
Regular-spangle Galvalume coil is widely processed into corrugated and trapezoidal roofing sheets for warehouses, factories, workshops, residential buildings and agricultural structures.
Suitable grades can be roll-formed into standing seam roof panels for industrial and commercial construction.
Galvalume coil can be processed into exterior wall panels, liner sheets and industrial cladding systems.
Farms, barns, storage facilities and livestock buildings commonly use natural Galvalume roofing and siding.
The metallic surface is widely used in industrial buildings where economical, durable and low-maintenance roofing is required.
The material can also be processed into gutters, flashings, profiles, enclosures and general building accessories.
The visible spangle surface provides a recognizable metallic finish that can be used directly without additional paint when appropriate.
The alloy coating combines aluminum barrier protection and zinc sacrificial protection for practical outdoor performance.
The aluminum-rich surface provides useful heat-reflective characteristics for roofing and building-envelope applications.
Suitable grades can be corrugated, profiled, slit and roll-formed into roofing and wall products.
AZ coating levels can be selected according to application, environment and customer specification.
Coil form supports continuous corrugating, slitting and roll-forming production lines for high-volume manufacturing.
Passivation can help provide temporary protection against storage stain and surface oxidation during transportation and warehouse storage.
A light oil film can provide additional temporary protection during storage and handling.
Dry surfaces may be selected when oil is not suitable for downstream processing.
Anti-fingerprint treatment can provide a cleaner surface and help reduce visible handling marks on exposed metallic panels.
Regular-spangle Galvalume steel coil can be slit to customized widths and processed into roofing sheets, wall panels, gutters, flashing and other profiles.
Roll-forming equipment should be clean and correctly adjusted to reduce coating scratches, pressure marks and surface damage.
Henan GDD can arrange slitting, cut-to-length processing, leveling and customized coil weight according to customer production equipment.
Cutting and punching expose the steel substrate at the processed edge. The surrounding metallic coating can provide a degree of sacrificial protection, but exposed edges should still be considered during product design.
Where severe corrosion exposure is expected, suitable edge protection, sealant or coating may be considered according to the finished product design.
Customers should avoid incompatible materials or uncontrolled chemical contact that could accelerate corrosion of the metallic coating.
Buyers should confirm steel grade, thickness, width, AZ coating weight, spangle appearance, surface treatment, coil ID and coil weight.
Roofing manufacturers should also confirm the required forming strength, profile depth, bending radius and effective sheet width after roll forming.
For visible roofing projects, customers should confirm whether regular spangle, minimized spangle or another surface appearance is preferred.
Henan GDD can provide the technical, commercial and customs documents required for compliant international shipment according to the destination country and agreed contract terms.
Available documents can include the Mill Test Certificate, Certificate of Origin, export license where required, commercial invoice, packing list, bill of lading and customs declaration documents.
Product photographs, coating inspection records, packing photographs, container-loading photographs and third-party inspection reports can also be arranged according to customer requirements.
Destination-specific certificates, chamber endorsement, legalization and customs documentation requirements should be confirmed before order placement.
Henan GDD supplies regular-spangle Galvalume steel coils to roofing sheet manufacturers, roll-forming factories, construction material distributors, building contractors and international steel buyers.
We support multiple steel grades, AZ coating weights, customized thicknesses, widths, coil weights, surface treatments, slitting and cut-to-length processing.
MTC, Certificate of Origin, export license where required and complete commercial and shipping documents can be provided for compliant export.
From specification review and quotation to production, inspection, packing, documentation and loading, our team provides one-stop export support for Galvalume steel coil orders.
Before shipment, inspection can include steel grade, thickness, width, AZ coating weight, spangle appearance, surface condition, coil ID, coil weight and packing condition.
Mechanical properties, coating weight, dimensional tolerances and surface defects can be checked according to the applicable standard and purchase specification.
MTC, inspection records, product photographs, packing photographs and loading photographs can be provided according to order requirements.
Third-party inspection can be arranged when required by the customer or project.
Regular-spangle Galvalume coils are normally packed with waterproof paper, protective steel covers, inner and outer edge protection, reinforced steel straps and identification labels.
Seaworthy export packing helps protect the metallic surface against moisture, scratches, impact and coil-edge damage during storage, loading and ocean transportation.
Coil orientation, skid design, shipping marks and package weight can be customized according to destination and unloading requirements.
Shipment can be arranged under EXW, FOB, CFR or CIF terms.
It is aluminum-zinc coated steel with clearly visible metallic crystal patterns formed when the hot-dip Al-Zn coating solidifies.
No. Galvalume uses an aluminum-zinc alloy coating. The visible pattern is produced by crystallization of the Al-Zn coating, although the term spangle is widely used commercially.
A typical coating contains approximately 55% aluminum, 43.4% zinc and 1.6% silicon by weight.
Common options include AZ50, AZ70, AZ100, AZ120, AZ150 and AZ180. Customized coating requirements can also be discussed.
It is widely used for corrugated roofing sheets, wall panels, warehouses, factories, agricultural buildings and general roll-formed construction products.
Yes. AZ150 is one of the commonly requested coating specifications for roofing and outdoor building materials.
Yes. Slitting, cut-to-length processing and customized coil weights can be arranged according to customer equipment.
Yes. Passivated, oiled, dry and anti-fingerprint surface treatments can be discussed according to the order specification.
Yes. MTC, Certificate of Origin, export license where required, commercial invoice, packing list, bill of lading and other agreed export documents can be provided.
Please provide the steel grade, thickness, width, AZ coating weight, surface treatment, spangle requirement, coil weight, quantity, destination port and required documents.
Yes. Third-party inspection can be arranged according to the inspection scope confirmed in the purchase contract.
Looking for regular-spangle AZ100, AZ120 or AZ150 Galvalume steel coils for roofing sheets, corrugated panels or wall cladding?
Send Henan GDD your required grade, thickness, width, AZ coating, spangle requirement, surface treatment, coil weight, order quantity, destination port and documentation requirements. Our team will provide a professional quotation, packing plan and compliant export solution.
