Sino Steel supplies conventional 55% aluminum-zinc-silicon alloy-coated steel sheet in standard cut sizes, custom cut-to-length formats and simple rectangular blanks. As a Galvalume steel sheet manufacturer and supplier, we match the base-steel designation, Al-Zn coating requirement, sheet dimensions, factory leveling, surface inspection and export packing to the actual order.
Once Galvalume coil is leveled and cut, the buyer is no longer purchasing only a coil specification. Finished length, flatness, squareness and cut-edge condition become part of the delivered product.
For buyers who need individual Al-Zn coated sheets in regular finished dimensions.
Order by grade / standard, coating requirement and thickness × width × length.Factory leveling and cut-to-length processing prepares the required finished sheet length from mother coil.
Check flatness, length and edge condition after processing.Suitable orders can be prepared into smaller rectangular blanks where that reduces later handling and cutting.
Finished dimensions and stack identity need their own final inspection.Galvalume and galvanized sheet can share similar dimensions, but they are not the same coated-steel product. This page is built around the conventional 55% Al-Zn-Si Galvalume / Aluzinc route, not zinc-coated GI.
Uses the specified aluminum-zinc alloy coating route. Base-steel designation and coating requirement stay separate.
Uses a zinc-based metallic coating route and should be quoted as a separate coated-steel product.
A bright metallic face does not prove which coating system is on the sheet.
Do not change GI to Galvalume, or Galvalume to GI, only because the sheet thickness and dimensions match.
The finished sheet still needs the correct forming, drawing or structural steel route beneath the metallic coating. Send the complete designation already used on the drawing or purchase specification.
A792 covers 55% aluminum-zinc alloy-coated steel sheet in coils and cut lengths with different base-steel designations for different application requirements.
A924 provides general requirements used with continuously hot-dip metallic-coated steel sheet specifications, including coils and cut lengths.
For European purchasing, use the full steel designation and AZ coating requirement from the project instead of shortening the RFQ to “Aluzinc sheet.”
If the buyer uses another national, customer or mill designation, the factory review can work from that original specification rather than making an approximate conversion.
A product name alone does not tell the manufacturer the required coating designation or mass. Put the original metallic-coating requirement from the applicable standard or project specification on the RFQ.
Confirm the conventional 55% Al-Zn-Si route when that is what the project requires.
Use the actual designation from ASTM, EN or the customer specification rather than wording such as “heavy Al-Zn coating.”
Keep strength and formability requirements separate from the metallic coating.
Anti-fingerprint, passivation, oiling or another treatment should be stated separately if the buyer needs it.
The factory still needs to know the base steel, coating route, finished sheet size and downstream process.
For exposed sheet, roofing feedstock or material that will be prepainted later, surface consistency can matter before the sheet ever reaches the forming line.
Review localized scratches, roll marks, pressure marks or handling damage that could remain visible on the finished product.
Acceptance should follow the ordered surface and downstream use.Use a controlled surface route when the order specifically requires it for forming, appearance or later coating.
Do not assume every Galvalume sheet is supplied with the same surface treatment.Surface treatments should be quoted only where they match the customer's forming, painting, storage and appearance requirements.
Treatment is separate from metallic coating mass.Unlike coil purchasing, cut sheet has a finished length. Factory leveling and cutting add new dimensional requirements that the original mother coil alone cannot prove.
| What to Send | Example RFQ Format |
|---|---|
| Standard / Base Steel + Size | ASTM A792 Type 1, 0.50 × 1250 × 2500 mm |
| Metallic Coating | 55% Al-Zn-Si, coating designation per purchase specification |
| Surface Treatment | AFP / passivated / oiled / specified dry surface where required |
| Further Processing | Cut into 625 × 1250 mm rectangular blanks |
Available sheet dimensions depend on the original coil, grade, coating route and factory cut-to-length capability, so this page does not publish one exaggerated universal size range.
Cut-to-length processing creates dimensions and edges that did not exist on the mother coil. The factory should inspect the delivered sheet after leveling and cutting.
Check the actual finished sheet against the confirmed order after the material has been leveled and cut.
For rectangular sheet or blanks, diagonal difference, cut squareness, burr and localized edge damage can affect later profiling or assembly.
Sheet dimensions do not prove the Al-Zn coating. Coating verification and visible surface review remain separate inspection items.
The broad faces retain the original hot-dip metallic coating. Cut-to-length and blanking create new edges, so those areas should be considered separately when they remain exposed in the finished part.
Keep sheet geometry within the order requirement so the buyer does not have to correct an out-of-square blank.
Review burr when the sheet will feed roll forming, shearing, stamping or manual assembly.
Do not describe the freshly cut edge as identical to the original coated face.
Finished stacks may need corner and edge protection where transport could damage thin sheet edges.
Galvalume sheet is often bent, roll formed or profiled after delivery. The buyer therefore needs to consider how the base steel and metallic coating behave after forming, not only how the flat sheet looks in the stack.
Confirm the grade, thickness and coating route against the final roof, wall or formed-section profile.
Where the order requires it, evaluate coating behavior after the specified bend or forming test rather than only on the flat surface.
Sharp bends can reveal coating or substrate issues that were not obvious before forming.
If the material will be prepainted later, identify that use before the surface treatment and coating route are finalized.
Cut sheet can trap water or condensation over a broad contact area. Dry material, suitable surface treatment and realistic export packing all matter after the sheet leaves the coating line.
Do not close visible water between flat sheets before banding and wrapping.
Temperature changes during transport can create moisture even when the factory packed the stack dry.
Anti-fingerprint, passivation or oiling should be used only where it matches the material and downstream process.
Outer wrapping should reduce rain entry without sealing obviously wet sheets inside the package.
Mill, manufacturer and factory records should keep the mother coil, base steel, Al-Zn coating route and finished sheet stacks connected after leveling and cutting.
Different dimensions or customer lots should remain physically and documentarily separated after factory cut-to-length processing.
A Galvalume steel sheet supplier should pack individual sheet stacks differently from coils. The finished package needs level support, stable banding, edge protection, dry wrapping and clear stack identity.
Use several continuous, level support points under the stack to reduce local bending during storage and lifting.
Protect thin cut edges where steel bands or handling equipment could create local damage.
Reduce water entry without sealing visible moisture inside the sheet stack.
Keep grade, coating route, finished dimensions and shipment lot linked to the physical package.
For buyers who need master or slit Al-Zn coated coil rather than individual cut sheet.
View Galvalume Steel Coil →For projects that require conventional zinc-coated GI sheet rather than an Al-Zn alloy coating.
View Galvanized Steel Sheet →For organic paint systems applied over the specified metallic-coated substrate.
View PPGL Steel Coil →For GI, Galvalume, PPGI, PPGL and other coated-steel purchasing routes.
View Coated Steel →Send the product standard or base-steel designation, thickness, width, length, Al-Zn coating requirement, quantity and destination. Add surface treatment, flatness, forming, blank size or packing requirements where relevant.
They use different metallic coating systems. This page refers to the conventional 55% aluminum-zinc-silicon alloy-coated route, while galvanized sheet uses a zinc-based coating route.
Yes. ASTM A792 covers 55% aluminum-zinc alloy-coated steel sheet in both coils and cut lengths. This page focuses on the finished cut-sheet purchasing and inspection issues.
Yes. Suitable orders can be leveled and cut to custom finished lengths or simple rectangular blanks. Flatness, squareness, edge condition and stack traceability should then be checked after processing.
XRF is one recognized coating-mass test route for metallic-coated steel sheet. The final inspection method and acceptance basis should follow the ordered standard and inspection requirement.
Stack dry material, use the specified surface treatment where required, protect the package from water entry and manage condensation risk during shipment and storage.
Base-steel designation, thickness, width, length, Al-Zn coating requirement, quantity and destination are enough to start. Add surface treatment, flatness, forming, blank cutting or packing details when they matter to the order.
