S350GD AZ150 Golden AFP Galvalume Steel GL
55% Aluzinc Steel Roof Panels Stone Coated Tiles Villa Roof ASTM
A792M S350GD
What is aluminium-zinc plated sheet
Aluminium-zinc plated sheet is a steel plate plating on the basis
of zinc with the addition of aluminium (passivation protection),
the general composition of 55% aluminium, 43.5% zinc, 1.5% silicon,
with excellent resistance to atmospheric corrosion, corrosion
resistance of galvanized sheet 2-5 times, but also has the high
temperature corrosion resistance of aluminium plate, smooth
surface, good appearance, but the formation of its plating and
resistance to welding a little worse. In foreign countries
generally about 40% of aluminium zinc plating used directly, about
60% of the plate is further as a colour coated substrate.
Aluminium-zinc coated steel coils undergo various surface
treatments to enhance their performance and suitability for
different applications. Here are some common surface treatments:
1. Chromate Treatment:
- Description: A chemical treatment involving the application of
chromate compounds.
- Purpose: Enhances corrosion resistance and provides a good base
for subsequent painting or coating.
2. Oiling:
- Description: A thin layer of oil is applied to the surface.
- Purpose: Prevents oxidation and corrosion during storage and
transport. It also aids in processing by reducing friction.
3. Passivation:
- Description: A chemical process that forms a protective oxide
layer on the surface.
- Purpose: Increases corrosion resistance and extends the life of
the steel by preventing surface rust.
4. Anti-fingerprint Coating:
- Description: A special coating that resists fingerprint marks.
- Purpose: Keeps the surface clean and aesthetically pleasing,
particularly useful in appliances and electronics.
5. Resin Coating:
- Description: A thin layer of resin is applied to the surface.
- Purpose: Enhances the surface's resistance to scratches and
corrosion, and provides a good base for painting.
6. Phosphate Treatment:
- Description: A chemical treatment that applies a phosphate layer.
- Purpose: Improves paint adhesion and enhances corrosion
resistance.
7. Pre-painting (Coil Coating):
- Description: The steel is coated with paint or other coatings.
- Purpose: Provides immediate protection and aesthetic appeal,
eliminating the need for additional painting after installation.
These surface treatments ensure that aluminium-zinc coated steel
coils offer superior performance, longevity, and versatility in
various industrial applications.
Aluminium-zinc-steel plated light steel has quite a few excellent
characteristics:
Aluminium-zinc plated light steel offers several outstanding
features. It boasts corrosion resistance that is three times
stronger than that of pure galvanising. The surface exhibits
attractive zinc flowers, making it ideal for use as exterior panels
on building roofs. Known as AZ150, aluminium-zinc steel plates
maintain their colour over time, even when exposed to chemical
corrosion. This is due to the formation of a protective aluminium
oxide layer on the surface, which isolates the keel from external
chemical substances and prevents rusting. This protective film
ensures the longevity and durability of the material, making it a
superior choice for construction applications.
Detailed Parameters:
| 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 |
| Environment | Zinc Weight/ G/sqm |
| indoor environment | AZ70 or AZ100 |
| Suburban environment | AZ150 or AZ100 + painting |
| Urban or industrial areas | AZ150+ pre painted paint coating |
| Coastal Areas | AZ180+ thick paint coating |
Application:
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