NEWS
S320GD galvanized steel sheet
GNEE Steel has introduced a new high-performance variant of its popular S320GD galvanized steel sheet-the S320GD+Z350-engineered specifically for coastal and marine environments. This upgraded product features a thick zinc coating (≥350g/㎡ double-sided) to combat salt spray and humidity, a major pain point for structural materials in coastal regions.
S320GD+Z350 retains the core advantages of standard S320GD, including a minimum yield strength of 320MPa and excellent weldability, while boosting corrosion resistance by 50% compared to conventional Z275-coated sheets. It's ideal for coastal pre-engineered buildings, marine equipment parts, and offshore platform components.
The new variant undergoes rigorous neutral salt spray testing to ensure compliance with EN 10346 standards. Below is a comparison of corrosion resistance between S320GD+Z350 and other coating grades:
| S320GD Zinc Coating Grade | Coating Weight (g/㎡) | Salt Spray Test (No Red Rust) | Service Life in Coastal Areas (Years) |
|---|---|---|---|
| Z180 | ≥180 | ≥500 Hours | 8-10 |
| Z275 | ≥275 | ≥1000 Hours | 12-15 |
| Z350 (New) | ≥350 | ≥1500 Hours | 18-22 |
"Coastal projects demand materials that can withstand harsh saltwater environments, and S320GD+Z350 delivers exactly that," noted the product development manager at GNEE Steel. "It's a game-changer for clients looking to minimize maintenance and extend the lifespan of their structures."
GNEE Steel's S320GD+Z350 is now available for global delivery, with flexible order quantities. Check our S320GD galvanized steel sheet specs for detailed test reports, or contact us to request a sample and customized quote!
- Available Steel Grade
| Steel grade | Coating | Yield(MPA) | Tensile(MPA) | Elongation(%) |
| DX51D | Z,ZF | -- | 270-500 | 20 |
| DX52D | Z,ZF | 140-300 | 270-420 | 22 |
| DX53D | Z,ZF | 140-260 | 270-380 | 26 |
| DX54D | Z,ZF | 140-220 | 270-350 | 30 |
| S220GD | Z,ZF | 220 | 300 | 18 |
| S250GD | Z,ZF | 250 | 330 | 17 |
| S280GD | Z,ZF | 280 | 360 | 16 |
| S320GD | Z,ZF | 320 | 390 | 15 |
| S350GD | Z,ZF | 350 | 420 | 14 |
| S400GD | Z,ZF | 400 | 470 | -- |
| S450GD | Z,ZF | 450 | 530 | -- |
| S500GD | Z,ZF | 500 | 560 | -- |