Hot-dip galvanized steel S320GD
Hot-dip galvanized steel S320GD in accordance with the EN 10346 standard is a high-strength structural steel specially designed for demanding applications in structural engineering and building construction. With the material number 1.0250, S320GD has a minimum yield strength Rp0.2 of 320 N/mm² and is therefore one of the steels in the higher strength classes. Hot-dip galvanizing in accordance with EN 10346 ensures that a homogeneously applied zinc coating permanently protects the base material against corrosion. The available coatings +Z, +ZF, +ZA, +ZM, +AZ and +AS allow targeted adaptation to different environmental conditions and mechanical stresses, which means that S320GD achieves exceptional durability and cost-effectiveness in construction projects.
Steel Grade Classification: What Makes S320GD Different
S320GD belongs to the family of high-strength galvanized structural steels. Compared with conventional commercial galvanized grades, it is engineered to withstand higher loads without sacrificing surface quality or corrosion resistance.
This makes it particularly suitable for modern construction systems where weight optimization and structural reliability are essential.
Galvanized steel is widely used across industries because zinc acts as a sacrificial layer. Even when the coating is damaged, zinc corrodes preferentially, protecting the underlying steel.
For hot dip galvanized S320GD steel, this protection is significantly enhanced due to the thickness and bonding strength of the zinc layer.
Key Benefits of Galvanized Structural Steel
- Extended service life
- Reduced maintenance requirements
- Stable performance in harsh environments
- Cost efficiency over the full life cycle
Mechanical Property Overview
| Mechanical Property | Requirement | Reference |
|---|---|---|
| Yield Strength | ≥ 320 MPa | Structural standard |
| Tensile Strength | 420–550 MPa | Structural standard |
| Elongation | ≥ 22% | Formability |
| Impact Resistance | Stable | Industrial use |
These properties ensure that S320GD galvanized steel performs reliably in both static and dynamic load conditions.
Zinc Coating Options and Their Uses
| Coating Type | Zinc Weight | Recommended Applications |
|---|---|---|
| Z180 | 180 g/m² | Indoor structures |
| Z275 | 275 g/m² | Construction & industrial |
| Z350 | 350 g/m² | High humidity areas |
| Z600 | 600 g/m² | Extreme corrosion zones |
Among these options, Z275 remains the most commonly selected coating for balanced performance and cost control.
Construction and Industrial Applications
Due to its strength and durability, S320GD+Z275 Hot Dip Galvanized Steel is widely applied in:
- Steel structure buildings
- Prefabricated construction systems
- Warehouses and logistics centers
- Industrial platforms and supports
- Transportation and equipment manufacturing
Its compatibility with modern forming and welding techniques further expands its application range.
Available Steel Grade
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
|
Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
|
SGCD1 |
0.12 |
0.50 |
0.60 |
0.040 |
0.030 |
0.025 |
|
|
SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
|
SGC400 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.150 |
|
|
SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
|
|
SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
|
|
For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
|
|
S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
GNEE STEEL focuses on supplying high-quality S320GD Hot Dip Galvanized Steel Coils and Sheets for global markets. With mature production coordination, strict inspection procedures, and export-oriented packaging standards, GNEE STEEL ensures each shipment meets customer expectations.
By offering stable supply, technical support, and flexible specifications, GNEE STEEL helps customers complete projects efficiently and confidently.
