What is Aluzinc Steel Coil?
Aluzinc steel coil, also known as aluminium-zinc coated steel, is a
type of steel product that features a coating made from an
aluminium-zinc alloy. This coating typically consists of 55%
aluminium, 43.4% zinc, and 1.6% silicon. The combination of these
metals in the coating provides the steel with enhanced properties,
making it suitable for various industrial and construction
applications.
Surface Treatment | Description | Advantages | Disadvantages |
|---|
Chromated | A layer of chromate coating is applied. | - Excellent corrosion resistance- Enhanced paint adhesion | - Contains hexavalent chromium (environmental concerns)- Requires
additional safety measures |
Non-Chromated | Uses alternative chemicals to provide corrosion resistance. | - Environmentally friendly- Good corrosion resistance | - May have slightly lower corrosion resistance than chromated |
Oiled | A thin layer of oil is applied to the surface. | - Temporary corrosion protection- Facilitates further processing | - Needs to be removed before painting or further coating |
Dry | No additional surface treatment after the coating process. | - Cost-effective- Ready for immediate use in some applications | - Limited corrosion protection |
Anti-Fingerprint | Special coating to prevent fingerprint marks and smudges. | - Maintains aesthetic appearance- Provides additional corrosion
protection | - May increase production cost |
Phosphated | A phosphate conversion coating is applied to enhance adhesion. | - Excellent paint adhesion- Additional corrosion resistance | - Additional processing step- Environmental considerations for
disposal |
Passivated | A passivation layer is applied to enhance corrosion resistance. | - Good initial corrosion resistance- Cost-effective | - May not be as effective as chromated coatings in harsh
environments |
Painted/Pre-painted | A layer of paint is applied over the Aluzinc coating. | - Aesthetic flexibility- Enhanced corrosion protection | - Higher production cost- Paint may degrade over time |
Category | Details |
|---|
| Thickness Range | 0.14 mm - 2.00 mm |
| Width Range | 600 mm - 1500 mm |
| Coil Weight | Up to 25 tons |
| Coil Inner Diameter | 508 mm / 610 mm |
| Coating Composition | 55% Aluminum, 43.4% Zinc, 1.6% Silicon |
| Coating Weight | AZ50 - AZ200 (50 g/m² - 200 g/m²) |
| Surface Finish | Regular Spangle, Mini Spangle, Zero Spangle |
| Surface Treatment | Chromated, Non-Chromated, Oiled, Dry, Anti-fingerprint |
| Mechanical Properties | |
| - Yield Strength | 300 - 550 MPa |
| - Tensile Strength | 300 - 600 MPa |
| - Elongation | 10% - 30% (depending on grade) |
| Spangle | Regular, Minimised, Zero |
| Coil Length | Custom lengths based on customer requirements |
| Standard Compliance | ASTM A792, JIS G3321, EN 10346 |
| Applications | Roofing, Siding, HVAC, Appliances, Automotive, Agricultural
Equipment, Industrial Components |
Applications and Uses of Aluzinc Steel Coils
1. Construction:
- Roofing and wall panels
- Gutters and downspouts
- Steel framing and structural supports
- Siding and cladding materials
2. Automotive:
- Body panels
- Underbody components
- Heat shields and exhaust systems
3. Appliances:
- Housings for washing machines, dryers, and refrigerators
- Microwave oven panels and components
4. Agricultural Equipment:
- Silos and grain bins
- Farm machinery and equipment panels
5. Industrial:
- Air conditioning and heating ducts
- Electrical cabinets and enclosures
- Furniture and storage systems
Summary:
55% Aluzinc steel coils are a versatile and durable material known
for their superior corrosion resistance, heat resistance, and
aesthetic appeal. These coils are used in various industries,
including construction, automotive, appliances, agriculture, and
industrial applications, providing long-lasting performance and
protection.
Export Packaging of Aluminized Zinc-Coated Steel Coils
When exporting aluminized zinc-coated steel coils, the packaging is
crucial to ensure the material arrives in good condition. The
packaging generally follows these steps:
1. Inner Packaging:
- Plastic or VCI (Volatile Corrosion Inhibitor) Paper: The coil is
first wrapped in plastic or VCI paper to protect against moisture
and corrosion during transit.
- Waterproof Paper: A layer of waterproof paper is often added over
the VCI paper for additional moisture protection.
2. Outer Packaging:
- Metal Strapping: Several metal straps are used to secure the coil
tightly. These straps are often made of steel to provide the
necessary strength.
- Edge Protectors: Edge protectors are placed at the coil edges
where the metal strapping is applied to prevent damage during
handling.
- Steel or Aluminum Cover: An outer layer of steel or aluminum is
wrapped around the coil for impact resistance.
- Palletization: If required, the coil can be placed on a wooden or
steel pallet. This makes it easier to handle with forklifts and
other lifting equipment.
3. Markings and Labeling:
- Identification Labels: Each coil is labeled with relevant
information such as grade, weight, dimensions, and destination.
- Export Markings: The package might also include export-specific
markings, such as handling instructions, port of discharge, and
consignee details.
