S320GD galvanized steel
Trying to decide between S320GD galvanized steel and painted protection for your project? Unlike one-dimensional suppliers, GNEE offers both options with tailored solutions to match your durability and budget needs.
We provide S320GD+Z275 galvanized steel in custom thickness (0.8-12.0mm), width (up to 3000mm), and even hybrid options (galvanized + topcoat). Read on to compare defenses and pick the right one for your application.
Packaging of galvanized steel sheets
Galvanized steel uses zinc coating for corrosion resistance, while painted steel relies on organic layers. Both serve construction, automotive, and industrial uses.
S320GD galvanized steel is a high-strength structural grade-Z275 (275g/m² zinc/side) delivers heavy-duty protection, contrasting with paint's surface-only defense.
Performance Comparison: S320GD+Z275 vs. Painted Steel
Key performance metrics highlight the differences between S320GD+Z275 galvanized steel and painted protection:
|
Performance Metric |
S320GD+Z275 Galvanized Steel |
Painted Steel (2-Coat System) |
Advantage |
|---|---|---|---|
|
Service Life (Outdoor) |
15-30 Years |
5-10 Years (before re-coating) |
S320GD+Z275 |
|
Scratch Resistance |
Self-healing (zinc sacrifices for steel) |
Permanent damage (exposes steel) |
S320GD+Z275 |
|
Application Temperature Range |
-50°C to 200°C |
-20°C to 120°C (paint degrades) |
S320GD+Z275 |
|
Maintenance Frequency |
Minimal (no re-coating needed) |
Every 5-7 Years (touch-ups/re-coats) |
S320GD+Z275 |
Mechanical Properties of S320GD+Z275 vs. Painted Steel
Both options retain S320GD galvanized steel's core mechanical properties, but coating impacts processability:
|
Mechanical Property |
S320GD+Z275 Galvanized Steel |
S320GD Painted Steel |
Standard |
|---|---|---|---|
|
Yield Strength (Min.) |
320 MPa |
320 MPa |
EN 10346 |
|
Tensile Strength |
400-510 MPa |
400-510 MPa |
EN 10346 |
|
Elongation (Min.) |
22% |
20% (paint limits flexibility) |
EN 10346 |
|
Bend Test |
180° (d=2t, no coating peel) |
90° (paint cracks at 180°) |
EN ISO 7438 |
Application-Specific Selection Guide
Choose based on your environment and needs-S320GD+Z275 galvanized steel excels in harsh conditions:
- Coastal/Offshore: S320GD+Z275 resists salt spray; paint fails quickly here.
- Industrial Zones: Galvanized steel handles chemicals; paint needs frequent touch-ups.
- Architectural Aesthetics: Painted steel offers color options; pair with galvanized base for durability.
- Temporary Structures: Painted steel may suffice; galvanized for long-term reuse.
GNEE offers hybrid solutions-S320GD+Z275 galvanized steel with a topcoat for both protection and color.
Size Availability for Both Protection Types
Consistent size ranges for S320GD galvanized steel regardless of protection method:
|
Product Form |
Thickness Range |
Width Range |
Length Range |
|---|---|---|---|
|
Coils |
0.8-6.0mm |
600-3000mm |
500-3000m |
|
Sheets |
1.0-12.0mm |
1000-2500mm |
1000-12000mm |
|
Cut-to-Size |
1.5-10.0mm |
Custom |
Custom |
S320GD+Z275 galvanized steel offers superior long-term protection, scratch resistance, and low maintenance compared to painted steel-ideal for harsh or long-service-life projects.
Painted steel works for aesthetic or temporary needs, but S320GD+Z275 is the reliable choice for durability.
At GNEE, we help you select the right protection for S320GD galvanized steel. Contact us today to request a personalized recommendation and a customized quotation.
- Available Steel Grade
|
Grade |
Yield Strength MPa≥ |
Tensile Strength MPa≥ |
Elongation A%≥ |
|
DX51D Z/ZM/AZ/AM |
240-380 |
270-500 |
22 |
|
DX52D Z/ZM/AZ/AM |
140-300 |
270-420 |
26 |
|
DX53D Z/ZM/AZ/AM |
140-260 |
270-380 |
30 |
|
DX54D Z/ZM/AZ/AM |
120-220 |
260-350 |
36 |
|
S220GD Z/ZM/AM |
220 |
300 |
20 |
|
S250GD Z/ZM/AZ/AM |
250 |
330 |
19 |
|
S280GD Z/ZM/AM |
280 |
360 |
18 |
|
S300GD A/AM |
300 |
380 |
18 |
|
S320GD Z/ZM/AM |
320 |
390 |
17 |
|
S350GD Z/ZM/AZ/AM |
350 |
420 |
16 |
|
S450GD A/AM |
450 |
480 |
15 |
|
S550GD Z/ZM/AZ/AM |
550 |
550 |
- |