0.14mm – 0.8mm Thin Gauge Galvalume Coils: Precision Engineered for High-Performance Fabrication

Our Thin Gauge Galvalume (Al-Zn) Coils are specifically manufactured for industries that require the perfect balance of lightweight design and heavy-duty corrosion resistance. Spanning a precision thickness range from 0.14mm to 0.8mm, these coils are produced using advanced continuous hot-dip technology, compliant with ASTM A792 and EN 10346 standards. Whether for intricate electronic shielding, lightweight roofing, or precision automotive components, Bomis Steel provides the dimensional accuracy and surface quality necessary for high-speed automated production.

Advanced Al-Zn Alloy Protection (AZ50 – AZ150)
The 55% Aluminum, 43.4% Zinc, and 1.6% Silicon alloy coating is the foundation of our Galvalume’s longevity. This specialized coating mass offers:

Twice the Durability of Galvanized: The aluminum barrier protection combined with zinc’s sacrificial healing ensures a service life significantly longer than standard GI coils, especially in high-temperature or mildly acidic environments.

Thermal Efficiency: The high heat reflectivity of the thin-gauge Galvalume surface makes it an ideal material for heat shields and energy-efficient building envelopes.

Mechanical Properties & Quality Assurance

• Forming Grades: Available in Commercial Steel (CS Type A/B) for standard bending and Structural Steel (SS Grades) for applications requiring specific yield strengths.

• Surface Treatments: Options include Anti-Fingerprint (AFP) coating, specialized oiling, or dry passivation to suit your post-processing requirements (painting, welding, or direct assembly).

• Micrometric Tolerance: We guarantee thickness consistency across the entire length of the coil, meeting or exceeding ASTM A568 restricted tolerance standards.

Technical Specifications Summary

Feature	Specification Range	Compliance Standard
Thickness	0.14mm – 0.80mm	ASTM A792 / EN 10346
Coating Mass	AZ30 to AZ150 ($g/m^2$)	Hot-Dip Al-Zn Alloy
Width	20mm – 1250mm (Custom Slit)	Precision Tolerance $\pm 0.05mm$
Surface Finish	Regular Spangle / AFP	Optimized for Aesthetics
Internal Diameter	508mm / 610mm	Suited for all Decoiling Lines
T-Bend	$\leq$ 2T (No Flaking)	High Ductility Grade

Certification

product testing

After the products are completed, they will undergo strict inspections before being packaged.

0.14mm – 0.8mm Thin Gauge Galvalume Coils Application Scenarios

Construction Industry
This is its main application area, as building materials require high weather resistance and long service life:
Roofing and wall materials: Can be used as a base material for color-coated steel sheets, used in the production of roofing and wall panels, suitable for the facades and roofs of industrial plants, warehouses, and large supermarkets. It can withstand outdoor sun, rain, and temperature changes, extending the maintenance cycle of buildings.
Building components: Components for garage doors, roller shutters, downpipes, and ventilation openings, as well as enclosure structure components for steel-framed buildings.

Agriculture
Suitable for the special environments of agricultural breeding and storage:
Construction of breeding facilities: Fences, walls, and roofing materials for pigsties and chicken coops, which can withstand corrosion from animal waste and outdoor weather conditions.
Agricultural storage facilities: Enclosure structures for small grain silos and feed storage bins.

Industrial Manufacturing
Outer casings of some light industrial equipment, such as small ventilation equipment and dust removal equipment.
Manufacture of shelving, especially shelving used for long-term storage and potentially exposed to humid environments.

Product Showcase

Frequently Asked Questions

 

1. What are the main challenges of using 0.14mm ultra-thin Galvalume?

The primary challenge with ultra-thin gauge Galvalume (0.14mm – 0.20mm) is maintaining structural flatness and preventing edge damage. At Bomis Steel, we use tension leveling technology to ensure the coils are free from “wavy edges” or “oil canning.” Additionally, our high-precision hot-dip process ensures that even at this thickness, the 55% Al-Zn alloy coating is perfectly uniform, providing consistent corrosion resistance across the entire surface.

2. How precise is your custom width slitting service?

For thin gauge materials, width precision is critical to prevent jamming in automated stamping machines. We offer precision slitting with a tolerance as tight as $\pm 0.05mm$. Our slitting lines are equipped with ultra-sharp carbide knives to ensure burr-free edges, which protects your tooling and ensures a clean finish on the final component.[Image showing a close-up of precision slit galvalume steel strips with smooth edges]

3. Does thin gauge Galvalume offer the same heat reflectivity as thicker sheets?

Yes. One of the unique properties of Galvalume is its high thermal reflectivity. Even at 0.14mm thickness, the aluminum-rich surface reflects up to 65-70% of solar heat. This makes thin gauge Galvalume an excellent, cost-effective choice for heat shields in appliances, automotive heat wraps, and energy-efficient roofing underlays.

4. Can 0.8mm Galvalume coils be ordered with Anti-Fingerprint (AFP) coating?

Absolutely. We recommend Anti-Fingerprint (AFP) treatment for both our thinnest and thickest gauges (0.14mm to 0.8mm). AFP is a transparent organic coating that not only prevents smudges during handling but also enhances the material’s corrosion resistance and provides a smoother surface for subsequent painting or gluing processes.

5. What standards do your thin gauge Galvalume coils comply with?

All our Galvalume products are manufactured to meet or exceed international standards, including ASTM A792 (Standard Specification for Steel Sheet, 55% Al-Zn Alloy-Coated) and EN 10346. We provide Mill Test Certificates (MTC) with every shipment, detailing the exact chemical composition, tensile strength, and zinc-aluminum coating mass (e.g., AZ50, AZ100, or AZ150).