Pre-Painted Galvalume Steel Coil
Aluminum zinc coated coil with a factory color finish for exterior paneling and roofing
Specifications
GL/PPGL Steel Coil
Galvalume Aluminum Zinc Coated Steel Coil
Aluminum zinc coated coil for roofing wall cladding and outdoor formed sections
Galvalume steel coil is carbon steel strip coated with an aluminum zinc alloy layer and supplied in coil for roll forming, decoiling and panel production. It is specified by roofing sheet makers, cladding fabricators and building product manufacturers who need a substrate that holds up outdoors better than standard galvanized coil when exposed to snow, ice and rain. Coating weight is ordered by designation from G20 through G90 and Z40 through Z350, so the panel life and the price can be matched to the climate the panel will sit in. Base grade, thickness and width are set on the order, which stops a roll former from having to take whatever coating weight a stockist happens to hold.
- Product Name — Galvalume Steel Coil
- Also Known As — Aluminum zinc coated steel coil galvanized aluminum zinc steel coil
- Place of Origin — China
- Standards — BS EN GB AISI ASTM DIN JIS
- Material — Q195 Q215 Q235B Q345B S235JR S355JR SS400 SS490 SM400 SM490 G350 G550
Why It Is Specified
Key Benefits of Galvalume Steel Coil
Better Outdoor Corrosion Resistance Than Galvanized
The aluminum zinc coating resists corrosion better than standard galvanized coil in outdoor exposure, which is why it is the usual choice for exterior metal paneling and roofing.
Coating Weight Chosen by Designation
G20 G30 G40 G60 and G90 and Z40 through Z350 are all available, so a coastal roof and an inland shed can be bought on the same purchase order at different coating weights.
Structural and Commercial Base Grades
Base steel runs from Q195 and Q235B through S235JR S355JR SS400 and the G250 to G550 range, so a soft forming grade and a high tensile roofing grade come from one supplier.
Thickness and Width Set by Your Line
Thickness from 0.1mm to 300mm and width from 1500mm, or customized, so coil is ordered to feed your roll former rather than to be slit again on arrival.
Rolled to the Standard You Quote
Coil is produced to BS EN GB AISI ASTM DIN or JIS, so a specification written for an export market can be matched without substituting an unfamiliar grade.
Coil Form for Continuous Forming
Supply in coil keeps a roll forming or decoiling line running instead of stopping to load sheet, which matters on long roofing panel runs.
Problems It Solves
What This Material Removes From Your Process
Galvanized Panels Corroding Early Outdoors
Standard galvanized coil loses surface in wet exposed duty. The aluminum zinc coating resists corrosion better in outdoor environments including snow ice and rain exposure.
Coating Weight Not Stated on the Order
Buying coil without naming the coating leaves panel life to chance. Ordering by G or Z designation from G20 to G90 and Z40 to Z350 puts the coating weight in the contract.
Coil That Has to Be Slit Again On Arrival
Standard width coil forces a second decoiling pass before it fits the line. Width from 1500mm or customized means coil arrives at the width your former takes.
Base Grade Substituted Against the Specification
A drawing written to EN or JIS is often filled with whatever grade is in stock. Base steel is quoted against the named standard and grade instead.
Application Scenarios
Where It Is Used
Exterior Metal Roofing Panels
Trapezoidal and standing seam roof sheet roll formed from coil for industrial sheds warehouses and commercial roofs.
Wall Cladding and Metal Paneling
Facade panels wall sheet and soffit lining where the coated surface is exposed to weather for the life of the building.
Agricultural and Greenhouse Structures
Roof and wall sheet plus formed sections for barns livestock buildings and greenhouse frames in wet and humid sites.
Solar Mounting and Outdoor Frameworks
Formed rails brackets and support sections for ground mount and roof mount structures that stay outdoors without further protection.
Purlins Decking and Formed Sections
C and Z purlins floor decking profiles and light structural sections roll formed direct from coil.
Ducting Tanks and Outdoor Enclosures
Rainwater goods ventilation ducting and equipment enclosures where snow ice and rain contact the panel surface.
Who It Is For
Buyers Who Specify This Product
- Roll forming plants buying coil to feed roofing and cladding profile lines
- Building product manufacturers buying coated substrate for purlins decking and formed sections
- Steel service centers buying master coil to slit into narrower strip for local fabricators
- Greenhouse and agricultural building suppliers buying weather exposed roof and wall sheet stock
- Solar mounting fabricators buying coated coil for outdoor rail and bracket sections
- Distributors supplying aluminum zinc coated coil into humid and coastal markets
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | Galvalume Steel Coil |
|---|---|
| Also Known As | Aluminum zinc coated steel coil galvanized aluminum zinc steel coil |
| Place of Origin | China |
| Standards | BS EN GB AISI ASTM DIN JIS |
| Material | Q195 Q215 Q235B Q345B S235JR S355JR SS400 SS490 SM400 SM490 G350 G550 |
| Alternative Base Grades | G250 G350 G450 G550 A36 SS400 S275JR S235 |
| Thickness | 0.1mm-300mm or customized as required |
| Width | From 1500mm or customized as required |
| Zinc Coating | G20 G30 G40 G60 G90 Z40 Z60 Z80 Z100 Z120 Z150 Z275 Z350 |
| Form | Coil |
| Application | Exterior metal paneling and roofing |
| Certificate | Mill test certificate |
Technical Features
- Aluminum zinc alloy coated carbon steel coil also described as galvanized aluminum zinc steel coil
- Thickness 0.1mm to 300mm or customized as required
- Width from 1500mm or customized as required
- Zinc coating designations G20 G30 G40 G60 G90 and Z40 Z60 Z80 Z100 Z120 Z150 Z275 Z350
- Base grades Q195 Q215 Q235B Q345B S235JR S355JR SS400 SS490 SM400 SM490 G350 G550
- Additional base grades G250 G350 G450 G550 A36 SS400 S275JR S235
- Produced to BS EN GB AISI ASTM DIN and JIS standards
- Supplied in coil for decoiling roll forming and panel production
Materials
- Carbon steel base strip in commercial and structural grades
- Aluminum zinc alloy coating applied to both strip faces
- High tensile base grades G450 and G550 for thin gauge roofing profiles
- Soft forming grades Q195 and Q215 for deep formed sections
Certification
- Mill test certificate supplied with the coil
Manufacturing
How It Is Made and Processed
Base coil rolled to the ordered thickness
Aluminum zinc alloy coating applied to the ordered G or Z designation
Coil cooled and recoiled to the ordered width
decoiling to narrower strip where the order calls for it
Coating designation and grade marked on the coil
Edge protection and coil banding before loading
Export packing for container or breakbulk shipment
Quality Control
Checks Before It Ships
- Base grade confirmed against the ordered standard before coating
- Coating designation checked against the ordered G or Z figure
- Thickness verified across the 0.1mm to 300mm ordered range
- Coil width checked against the ordered width before banding
- Coated surface inspected for coating defects and edge damage
- Mill test certificate issued for the supplied coil
Customization
What We Can Change on Your Order
- Thickness set anywhere in the 0.1mm to 300mm range
- Width from 1500mm or customized to your line
- Coating weight chosen from G20 to G90 or Z40 to Z350
- Base grade selected from the commercial structural or high tensile ranges
- Slit to narrower strip widths on request
- Coil weight and inner diameter set to suit your decoiler
Comparison
Galvalume Steel Coil Against the Alternatives
| Standard galvanized steel coil | The aluminum zinc coating has higher corrosion resistance than standard galvanized coil in outdoor environments including exposure to snow ice and rain. |
|---|---|
| Uncoated carbon steel coil | Uncoated coil needs painting or another protective system after forming, where coated coil goes straight from the roll former to the roof. |
| Prepainted PPGL coil | Galvalume is the bare coated substrate, so it costs less where color is not required and it can be painted later by the fabricator. |
| Buying coated sheet instead of coil | Coil feeds a roll former continuously and lets panel lengths be cut to the job, where sheet fixes the panel length before the order is placed. |
Use Guide
Specifying Handling and Welding Notes
- Name the coating designation as well as the base grade so panel life is set on the order rather than assumed
- Match the base grade to the profile depth and use the soft forming grades where the section is deeply formed
- Check the coating weight against the exposure of the site and step up for coastal and high rainfall projects
- Order the coil width to the input width of your roll former to avoid a second decoiling pass
- Keep coils dry and banded on arrival because water trapped between wraps marks the coated surface
- Ask for the mill test certificate with the shipment so the base grade and coating are documented
Questions Buyers Ask
Galvalume Steel Coil FAQ
What thickness and width can you supply in Galvalume coil?
Thickness runs from 0.1mm to 300mm and width from 1500mm, both customized as required. Tell us the input size your roll former takes and we quote to it.
Which coating weights are available?
G20 G30 G40 G60 and G90 and Z40 Z60 Z80 Z100 Z120 Z150 Z275 and Z350. Heavier designations are normally chosen for coastal and high rainfall exposure.
How does Galvalume compare with galvanized coil for a roof?
Galvalume has higher corrosion resistance than standard galvanized coil in outdoor environments and resists corrosion better under snow ice and rain, which is why it is widely used for exterior paneling and roofing.
Which base grades do you hold?
Q195 Q215 Q235B Q345B S235JR S355JR SS400 SS490 SM400 SM490 G350 and G550, plus G250 G450 A36 S275JR and S235 where the specification calls for them.
Can the coil be slit to our strip width?
Yes. Coil is slit to narrower widths on request, so a service center or roll former can order finished strip rather than master coil.
Which standards do you roll to?
BS EN GB AISI ASTM DIN and JIS. Quote the standard and grade from your drawing and the coil is supplied against it.
Do you supply a mill test certificate?
Yes, a mill test certificate is issued for the supplied coil covering the base grade and coating designation. Ask for the mill test certificate when you place the order.
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