High Flexibility 3105-H24 White Color Coil for Rain Gutter & Downspout Production

Product Introduction

3105-H24 exterior white color coated aluminum coil is engineered specifically for roll-forming seamless rain gutters and downspouts in residential and commercial architecture. The 3105 alloy offers reliable corrosion resistance, while H24 temper provides an ideal balance of strength and ductility, significantly reducing coating cracking and springback during bending and profiling.

Available with PE polyester or PVDF fluorocarbon coatings, this white coil features consistent surface color, strong UV resistance and anti-chalking performance. It withstands long-term outdoor exposure, rain, humidity and moderate coastal salt mist, maintaining stable appearance and drainage performance. We support custom thickness, slit width and RAL white color matching, with strict surface inspection to lower rejection rates during continuous gutter production. Factory direct bulk supply is available for gutter manufacturers and building material distributors.

3105 Aluminium Alloy Characteristics

3105 aluminium alloy provides a balanced combination of corrosion resistance, strength, formability, and coating compatibility. It is especially suitable for gutter and downspout production because the coil can withstand bending and roll-forming processes without easy cracking, peeling, or deformation.

Taking 3105 H26 as an example, the tensile strength is generally around 160-200 MPa, the yield strength is around 130-170 MPa, and the elongation is approximately 2%-6%. This temper provides sufficient strength while maintaining suitable formability for down gutter manufacturing.

Product Picture

Product Specifications

Key Advantages of 3105 Color Coated Aluminium Coil for Down Gutter

Product Display

Applications

1. Residential Buildings: Used for downspouts and rain gutters in villas, apartments, townhouses, and private homes, combining efficient drainage with architectural appearance.

2. Commercial and Public Buildings: Suitable for drainage systems in shopping malls, office buildings, hotels, schools, hospitals, and public facilities.

3. Industrial Facilities: Used for factories, warehouses, workshops, and industrial buildings where outdoor durability and corrosion resistance are required.

4. Municipal Engineering: Suitable for public infrastructure, municipal buildings, roads, bridges, and large-scale drainage projects.

5. Villa and High-End Communities: Custom-colored down gutters can match exterior decoration and improve the overall visual quality of the building.

Production Process

1. Raw Material Inspection: Select qualified aluminium raw materials and test chemical composition and mechanical properties to ensure compliance with production standards.

2. Melting and Casting: Melt aluminium materials in a professional furnace and cast them into aluminium slabs or billets through controlled casting technology.

3. Hot Rolling and Cold Rolling: Roll aluminium slabs into coils and reduce them to the required thickness with accurate thickness control.

4. Annealing Treatment: Heat the cold-rolled coils in an annealing furnace to improve ductility and reduce internal stress.

5. Surface Pretreatment: Degrease, rinse, and passivate the aluminium surface to improve coating adhesion and corrosion resistance.

6. Color Coating: Apply primer and topcoat through a roller coating machine, with coating thickness controlled evenly.

7. Curing Process: Bake the coated coils in a curing oven to ensure full coating curing and strong adhesion.

8. Slitting and Cutting: Slit large coils into custom widths or cut them into required lengths according to customer requirements.

9. Quality Inspection: Test coating adhesion, coating thickness, color consistency, mechanical properties, and corrosion resistance.

10. Packaging and Shipping: Pack coils with moisture-proof film, kraft paper, protective materials, and export-standard pallets for safe transportation.

FAQs

Q1: What makes 3105-H24 better than 3105-H14 for gutter coil?

A1: H24 is strain-hardened and partially stabilized. It has better elongation and forming performance than H14. It is less prone to cracking when forming tight gutter profiles and shows lower springback, which is preferred by most gutter roll-formers.

Q2: Is the white coating flexible enough for roll forming gutters?

A2: Yes. Our coating formula is optimized for gutter fabrication. When following the recommended bending radius, the paint layer stays intact without cracking. Overly sharp folds will still raise the risk of coating damage.

Q3: Should I choose PE or PVDF coating for outdoor gutters?

A3: PE coating is economical for inland normal climate areas with a service life of around 8–12 years. PVDF coating delivers outstanding UV and anti-chalk performance, suitable for high-sunlight, coastal and premium architectural projects with longer warranty requirements.

Q4: What common specifications are available for this 3105-H24 white gutter coil?

A4: Standard thickness covers 0.30mm–0.60mm. Slit widths range from 300mm to 1250mm, and we can cut custom widths to fit different gutter machines. Popular white colors include RAL9016 and RAL9003.

Q5: Can this 3105-H24 white color coil be used in coastal areas?

A5: It can be used in coastal regions, but PVDF coating is highly recommended to resist salt spray erosion. PE coated versions are more suitable for inland non-coastal environments. Proper edge sealing during installation helps extend service life.

Export Standard Packaging

Export standard seaworthy packing is available with wooden pallets in horizontal or vertical packaging according to customer requirements. Protective packing helps prevent moisture, scratches, collision damage, and deformation during long-distance transportation.

Contact Us for 3105 Color Coated Aluminium Coil

If you need 3105 alloy color coated aluminium coil for down gutter, rain gutter, downspout, or roof drainage system production, please contact us for specifications, coating options, color matching, samples, and quotation details.

Dingang Painted Aluminium Coil Manufacturer

Dingang painted aluminium coil is a reliable choice for color coated aluminium coil and sheet production. Dingang is a professional manufacturer of aluminium alloy color coated aluminium coil and sheet materials since 2002.

Welcome to contact us if you have any demand for color coated aluminium coil, prepainted aluminium sheet, aluminium gutter coil, or customized aluminium coating materials.

Changzhou Dingang Metal Material Co., Ltd.

Robert Tang, Sales Director

Email: robert@cnchangsong.com