Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of s350gd+az al-zn alloy galvanized steel sheet in China. Welcome to wholesale customized s350gd+az al-zn alloy galvanized steel sheet at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
Galvalume sheet is an alloy structure. Its main components are aluminum, which accounts for about 55%, and zinc is 43.4%. In addition, 1.6% of silicon is added, and zinc is 43.4%. In addition, 1.6% of Silicon is added, and then a sheet is formed after high temperature. Its corrosion resistance is very outstanding, and its durability is also very excellent.
| Standard: | GB/T 2518-2019; EN10346-2015; JISG3302-2012; ASTM A653M-17; AS1397-2011; |
| Grade: | DC51D+AZ, DC52D+AZ, DC53D+AZ, DC54D+AZ,S250GD+AZ, S300GD+AZ, S350GD+AZ, S450GD+AZ,S550GD+AZ |
| Coating mass: | 60 - 600 g/m2 (both sides or one side) |
| Length: | 2000mm or coil |
| Width: | 10mm--1250mm |
| Thickness: | 0.3-2mm |
| Coil inner diameter: | 508/610mm |
| Surface finish: | Regular spangle, Minimized spangle, Skin passed |
| Coil weight: | 0.5-8tons |
| Surface treatment: | C, C3, CN, CO, CO3,CON, P, PO, AF, AF3, AFN, SL, SL3,SLN, O, N. |
| Packing: | waterproof paper and steel strip, or according to request |
Which coating class do you need
|
Class |
Both sides |
Per side, approx. |
Service environment |
|
AZ100 |
100 g/m² |
~20 µm |
Dry inland roofs, indoor structural parts |
|
AZ150 |
150 g/m² |
~30 µm |
Standard roofing and cladding - the default choice |
|
AZ185 |
185 g/m² |
~37 µm |
Coastal, industrial, high-humidity sites |
Note: EN 10346 AZ designations are metric and start at AZ100. ASTM A792 uses the imperial series (AZ50 = 0.50 oz/ft² = 150 g/m² = AZ150). Confirm which system your drawing uses - the two numbers differ by a factor of three.
S350GD+AZ vs the grades buyers usually compare
|
Grade |
Yield |
Elongation |
Choose it when |
|
S250GD+AZ |
≥ 250 MPa |
≥ 22 % |
Deeper bends, tighter radii |
|
S350GD+AZ |
≥ 350 MPa |
≥ 16 % |
Structural purlins, load-bearing panels |
|
S450GD+AZ |
≥ 450 MPa |
not guaranteed |
Maximum strength, simple flat profiles |
|
DX51D+AZ |
- |
≥ 22 % |
Non-structural, general forming |
Two things worth knowing before you specify:
S350GD gives up ductility for strength. At 16 % elongation it will not take the tight bend radius that S250GD will. If your profile has a tight inner radius, either open the radius or drop a grade.
Above S450GD, EN 10346 no longer guarantees a minimum elongation. For a tight-radius profile in a very high-strength grade, request a trial bend on a sample length first.
Al-Zn vs pure zinc (GI): what you are actually buying
|
Property |
S350GD+AZ (55 % Al-Zn) |
S350GD+Z (pure zinc) |
|
Atmospheric corrosion life |
Typically 2–4× GI at equal coating mass |
Baseline |
|
Cut-edge protection |
Weaker - aluminium does not sacrifice as readily |
Stronger cathodic protection at cut edges |
|
Continuous service temperature |
Up to 315 °C without discoloration |
~200 °C; colour change from ~250 °C |
|
Heat / light reflectivity |
> 0.70 (exceeds the 0.65 EPA Energy Star threshold) |
Lower |
|
Best for |
Long-life roofs, warm or coastal climates, heat-reflective parts |
Parts with many cut edges, welding-intensive work, lowest cost |
Pick AZ for long service life in atmospheric exposure; pick Z when cut edges, heavy welding or lowest cost dominate. If your panels are sheared on all four sides and installed unpainted near the sea, say so - we will flag it and may recommend a higher coating class or pure zinc instead.
Hot-dip Al-Zn Coated Steel Coil Characteristic
Machinability: It can satisfy the processing requirements of rolling, coiling and others processes alike.
Thermal resistance: Common HDG steel plate normally works under 230°C, and has its color changed at 250°C, however, hot-dip Al-Zn coated steel plate can sustain the environment at 315°C for long time.
High reflectivity: Reflection ability of heat and light is twice as much as those of hot-dip zinc steel sheet, and its reflectivity is more than 0.70, exceeding 0.65 (required by the EPA Energy Star Standard), which is an ideal construction materials of saving energy.
Resistance to corrosion: Al-Zn coated steel sheet has better performance in corrosion resistance than Gl sheet of the same thickness and its service life is 2-6 times longer than general Gl sheet.
Customer case
Team style
Why GNEE Steel?
1. GNEE STEEL has many years of experience in the industry and can fulfill all kinds of steel needs.
2. GNEE STEEL understands the Chinese galvanized steel products market very well.
3..GNEE offers you high quality products at the most competitive prices.
Hot Tags: s350gd+az al-zn alloy galvanized steel sheet, China s350gd+az al-zn alloy galvanized steel sheet manufacturers, suppliers, factory, Galvanized Steel Coil DX51D AZ, SGLCC, DX51D AZ Galvalume Steel Coil, Galvanized Steel, Zinc Plating Aluminium, Aluminum Zinc Plate
