Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of g300gd+az hot aluminum zinc galvalume steel sheet in coils in China. Welcome to wholesale customized g300gd+az hot aluminum zinc galvalume steel sheet in coils at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
Products Description
G300GD+AZ Galvalume Steel Sheet in Coils is a high-performance hot-dip aluminum-zinc alloy coated steel product, exclusively supplied by GNEE STEEL. Engineered with a G300GD high-strength steel substrate and AZ-series aluminum-zinc coating (55% Al, 43.4% Zn, 1.6% Si), this coil integrates exceptional tensile strength, superior corrosion resistance, and excellent formability.
As a cost-effective and durable alternative to traditional galvanized steel, G300GD+AZ Galvalume Steel Coil is widely applied in construction, industrial manufacturing, and infrastructure projects, delivering long-term reliability even in harsh environments. Its G300GD grade ensures stable mechanical properties, while the AZ coating provides dual protection, making it the preferred choice for customers pursuing high-quality and cost-efficient steel solutions.
Surface treatment
Surface treatment ofG300GD+AZ hot aluminum zinc steel:
Los acid passivation:C
Smear oil: O
Los acid passivation and oil: CO
Fingerprint resistant membrane: UF
Un-treatment: U
The coating weight of G300GD+AZ aluminum and zinc
Bebon international can offer the weight of aluminum and zinc from 30/30g/m2 to 90/90g/m2
The standard weight ofG300GD+AZ aluminum and zinc is 30/30g/m2 , 40/40g/m2, 50/50g/m2,
60/60g/m2, 75/75g/m2 , 90/90g/m2
When the coating weight of 50/50g/m2, the thickness of coating layer is 13.3μm.
Chemical composition
Chemical composition forG300GD+AZ aluminum and zinc steel
|
Grade |
C |
Mn |
P |
S |
other alloy element |
|
G300GD+AZ |
0.3 |
1.60 |
0.100 |
0.035 |
≤0.22 |
Mechanical property
Mechanical property ofG300GD+AZ aluminum and zinc steel
|
Grade |
Yield |
Tensile |
Elongation after fracture |
|
G300GD+AZ |
300 |
340 |
18 |
Equal material
Equal material forG300GD+AZ aluminum and zinc steel
|
Q/BQB 425-2004 |
AS 1397-2001 |
EN10215-1995 |
ASTMA792M-02 |
JISG3321-1998 |
ISO9364-2001 |
|
S300GD+AZ |
G300+AZ |
- |
- |
- |
- |
Application
1 construction industry
House top, external house, garage door, fence, window-shades
2 household appliance industry
oven, explosion-proof strip, solar water heaters, electric parts
3 automobile industry
Car muffler, exhaust pipe, signboard
4 industrial instrument
Electric control cabinet, industry refrigeration cabinets, vending machines
Frequently Asked Questions (FAQ)
1. What does G300GD+AZ mean in the product name?
- G300GD: A high-strength steel grade compliant with EN 10346, indicating a minimum yield strength of 300 MPa, suitable for structural applications requiring high load-bearing capacity.
- AZ: Refers to the aluminum-zinc coating series, which is a 55% Al-43.4% Zn-1.6% Si alloy coating, providing superior corrosion protection.
2. What is the difference between G300GD+AZ and G250 AZ galvalume steel coils?
The main difference lies in the steel grade: G300GD has a minimum yield strength of 300 MPa, while G250 has a minimum yield strength of 250 MPa. G300GD+AZ offers higher strength and load-bearing capacity, making it more suitable for high-stress structural applications. Both share the same AZ coating composition and corrosion resistance performance.
3. Which AZ coating mass (AZ100/AZ150/AZ200) should I choose?
- AZ100 (100g/m²): Suitable for mild environments (rural areas, indoor applications) with low corrosion risk.
- AZ150 (150g/m²): The most common choice, suitable for general outdoor applications (urban areas, non-coastal regions).
- AZ200 (200gm²): Recommended for harsh environments (coastal areas, industrial zones with high chemical pollution) requiring maximum corrosion resistance.
4.Can G300GD+AZ Galvalume Steel Coil be painted?
Yes, it is an excellent base for painting. The smooth AZ coating surface ensures strong paint adhesion. It is widely used as the substrate for pre-painted galvalume coils (PPGL) with PE, SMP, or PVDF coatings, which enhance aesthetics and further improve corrosion resistance for decorative applications.
5.What is the typical service life of G300GD+AZ Galvalume Steel Coil?
The service life varies by environment: - Mild rural areas: 15-20 years - Urban areas (non-coastal): 10-15 years - Coastalindustrial areas: 8-12 years (still 3-5 times longer than galvanized steel). Regular maintenance (e.g., cleaning) can extend the service life further.
6.Is G300GD+AZ suitable for bending and stamping?
Yes. The G300GD grade offers balanced strength and ductility, and the AZ coating has excellent adhesion. It can be easily bent (minimum bending radius ≥2x sheet thickness), stamped, sheared, and rolled without coating cracking or peeling, making it suitable for various processing needs.
7.What are the packaging and transportation requirements?
We use export-standard packaging: each coil is wrapped with waterproof kraft paper and PE film, secured with steel strapping, and placed on wooden pallets or metal frames to prevent moisture, scratches, and damage during transportation. For sea shipping, additional moisture-proof and anti-rust measures are taken. We can also provide custom packaging according to your requirements.
8.What is the MOQ and delivery time for G300GD+AZ Galvalume Steel Coil?
- MOQ (Minimum Order Quantity): 25 tons per order.
- Delivery Time: 15-25 days after order confirmation (subject to order quantity, customization requirements, and production schedule).
For urgent orders, we can arrange priority production to meet your timeline.
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