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| Place of Origin | China |
| Brand Name | Decho Steel |
| Certification | ISO9001 |
| Model Number | DX51D Commercial Quality |
55% Aluzinc Steel Roof Panels DX51D ASTM A792M S280GD Galvalume Steel Coil
55% Aluzinc steel coils, also known as Galvalume or Aluminium-Zinc alloy coated steel, are a type of steel coated with an alloy comprising approximately 55% aluminum, 43.4% zinc, and 1.6% silicon. This unique coating provides a combination of the excellent corrosion resistance of aluminum and the galvanic protection of zinc, making it a superior material for various applications.
Composition:
- Aluminum (55%): Provides exceptional corrosion resistance by forming a protective layer of aluminum oxide.
- Zinc (43.4%): Offers sacrificial protection, similar to traditional galvanized steel, protecting the steel substrate by corroding preferentially.
- Silicon (1.6%): Enhances adhesion of the coating to the steel and helps maintain the integrity of the alloy layer during fabrication.
When comparing lightweight steel keels, one must consider the differences in scratch resistance and durability between galvanized and aluminium-zinc plated steel.
Material Requirements
The home appliance industry has specific requirements for aluminium-zinc coated steel to ensure it meets the necessary standards for performance and durability. These requirements include:
1. Composition:
- Typically, the coating consists of 55% aluminium, 43.4% zinc, and 1.6% silicon. This composition offers a balanced combination of protection and durability.
2. Thickness:
- The thickness of the aluminium-zinc coating can vary depending on the application, but it generally ranges from 30 to 150 grams per square meter.
3. Base Steel:
- The base steel used is usually low-carbon steel, which provides a good balance of strength and formability.
1. Refrigerators:
- Aluminium-zinc coated steel is used for both the outer and inner panels of refrigerators, providing a clean, modern look and excellent corrosion resistance.
2. Washing Machines:
- The outer casing and drum of washing machines benefit from the material’s corrosion resistance and formability, ensuring longevity and durability.
3. Microwave Ovens:
- The reflective and heat-resistant properties make it ideal for the inner and outer panels of microwave ovens.
4. Air Conditioners:
- Used in the casing and some internal components, offering protection against harsh outdoor environments and enhancing energy efficiency.
5. Dishwashers:
- The corrosion-resistant properties protect against the high humidity and detergent exposure inside dishwashers.
6. Ovens and Stoves:
- The material’s heat resistance and durability are perfect for oven and stove exteriors and certain internal components.
1) Standard: ASTM A792M, AS1397, EN10346/ EN10143 all according to the customer's request
2) Grade: SGCC, CS-Type B, Grade 350, G550, Grade 50, Grade 80, SS550GD, all according to the customer's request
3) Capacity: about 20000 tons per month
4) Thickness: from 0.13mm to 2mm, all available
5) Width: from 600mm to 1250mm, regular size:750-762mm,900-914mm,1000mm,1200mm,1219-1250mm all available
6) Coil ID: 508mm
7) Coil weight: from 2-10MT, according to the customer's request
8) Zinc coating weight: AZ30~AZ165g/m2
9) Spangle: regular spangle,big spangle, small spangle
10) Surface treatment: Anti-finger print (Green, Blue, Golden, No color) Chemical passivating, oils, passivating oils,skin passed
11) Edge: mill edge, cut edge
12) Min trial order 25 ton each thickness
| SURFACE TREATMENT | DESCRIPTION OF USE |
| CHROMATE PASSIVATION(C) | Surface treatment for high-strength steel plates after hot-dip plating to reduce white rust during transport and storage |
| Chrome-free passivation(C5) | Surface treatments that require limiting the amount of hexavalent chromium, etc. in passivation solutions that are harmful to the environment and humans |
| Anti-finger print(N) | Surface treatment after the passivation process, which acts as a lubricant during processing, prevents fingerprints from staining during operation, and prevents premature blackening of the surface during use. |
| Chrome-free and fingerprint resistant(N5) | Surface treatment after the passivation process, in the process of lubrication, to prevent the operation of the fingerprint staining, to prevent the use of the surface of the process of premature blackening, and at the same time, the requirement to limit the fingerprint-resistant film harmful to the environment and human body, such as hexavalent chromium content |
| Oiled(O) | Surface treatment added after the passivation process to further reduce rusting during long-distance transport and long-term storage |
| Usage | Steel Grade | Yield Strength(MPa) | Tensile Strength(MPa) |
Elongation at break A80mm % ≥ |
| Generally used | DC51D+AZ | 190～360 | 270～500 | 22 |
| stamping | DC52D+AZ | 140～300 | 270～420 | 26 |
| deep drawing | DC53D+AZ | 140～260 | 270～380 | 30 |
| extra-deep washout | DC54D+AZ | 120～220 | 260～350 | 36 |
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