galvanized steel plate
Unsure whether S350GD+Z120 is the right galvanized steel plate for your project? Let's compare. As a direct factory with 20 years of experience, GNEE Steel provides expert insights on S350GD+Z120 galvanized steel plate and how it stacks up against other coating grades. In this guide, we'll break down the key differences to help you decide.
Galvanized steel plate
Galvanized steel plates are classified by zinc coating weight (Z120, Z200, Z275). Each grade suits different environments and budgets.
S350GD+Z120 sits in the entry-level protective range, offering a balance of cost and performance for less demanding applications.
Understanding how it compares to higher grades helps you avoid overpaying for unnecessary protection or underbuying for your needs.
S350GD+Z120 vs. S350GD+Z200 vs. S350GD+Z275
The table below compares key features of different S350GD coating grades:
| Feature | S350GD+Z120 | S350GD+Z200 | S350GD+Z275 |
|---|---|---|---|
| Zinc Coating Weight | 120g/m² | 200g/m² | 275g/m² |
| Estimated Indoor Lifespan | 15-20 years | 20-25 years | 25-30 years |
| Estimated Mild Outdoor Lifespan | 8-12 years | 12-18 years | 18-25 years |
| Best For | Indoor use, dry areas | Moderate outdoor, covered areas | Harsh outdoor, coastal areas |
| Relative Cost | 100% (base) | 115-120% | 130-140% |
| Processing Difficulty | Easy | Easy | Slightly higher |
S350GD+Z120 is the most cost-effective option for indoor and mild environments.
When to Choose S350GD+Z120
Select S350GD+Z120 for these scenarios:
Indoor applications like storage systems, furniture, and electrical enclosures.
Covered outdoor areas (e.g., carports, covered walkways) with minimal direct exposure.
Projects with tight budgets where maximum corrosion resistance isn't required.
Components that will be painted or further coated after installation.
Short to medium-term projects (5-15 years) where long-term outdoor exposure isn't a concern.
It's also ideal for manufacturers looking to balance quality and cost in high-volume production.
Chemical & Mechanical Consistency Across Grades
While coating weights differ, all S350GD grades share the same core properties:
| Chemical/Mechanical Property | S350GD+Z120 | S350GD+Z200 | S350GD+Z275 |
|---|---|---|---|
| Yield Strength | ≥350 MPa | ≥350 MPa | ≥350 MPa |
| Tensile Strength | 420-560 MPa | 420-560 MPa | 420-560 MPa |
| Elongation | ≥18% | ≥18% | ≥18% |
| Chemical Composition | Same | Same | Same |
This means strength and processability remain consistent across all coating grades.
S350GD+Z120 galvanized steel plate is the best choice for cost-conscious projects in indoor or mild environments, offering sufficient protection without the premium price of higher coating grades. GNEE Steel can help you select the right grade for your specific needs.
To get a personalized comparison for your project or request a quote for S350GD+Z120, please contact our sales team now. We'll provide expert guidance to ensure you make the right investment.
- 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 |
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