S250GD+Z hot dip galvanized steel
S250GD+Z hot dip galvanized plates(coils) are featured with strong coating adhesiveness, high erosion-resistance, accurately controlled zinc coating thickness, high size precision, flat profile and good mechanical, processing and welding performance. They can be used for making outside and inside automotive plates, structural parts and reinforcements.
With a tensile strength of 250 MPa, S250GD can handle significant mechanical stress. The zinc layer enhances its durability, making it suitable for outdoor applications and extending product lifespan while minimizing maintenance needs.
Application Scenarios
S250GD+Z galvanized steel performs particularly well in the following environments:
1. Structural Building Components
Galvanized steel sheets are integral to modern construction due to their reliability and longevity.
- Roof decking and wall cladding
- Load-bearing purlins and columns
- Secondary framing for curtain walls
Buildings exposed to coastal climates or industrial pollution benefit from the sacrificial protection of galvanization, helping stave off rust and structural degradation.
2. Agricultural and Farm Structures
Agricultural facilities require materials that withstand humidity and chemical exposure from fertilizers and animal waste. S250GD+Z is commonly used in:
- Barn siding and roofing
- Livestock enclosures
- Feed storage structures
- Equipment shelters
The durable coating reduces maintenance time, allowing farmers to focus on operations rather than corrosion issues.
3. Solar Farm and Renewable Installations
With the rise of renewable energy projects, galvanized structural products are increasingly specified for:
- Solar panel mounting frames
- Support structures for tracking systems
- Light-weight galvanized arrays
The combination of corrosion resistance and strength ensures long service life in outdoor energy installations.
Specifications Table
S250GD+Z hot dip galvanized automotive steel mechanical performances and coating adhesiveness:
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Mechanical performances |
Coating adhesiveness |
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Yield strength MPa ≥ |
Tensile strength MPa ≥ |
After breakage percent elongation % ≥ |
Bending center diameter ( a=plate thickness) |
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L0=80mm, b=20mm |
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Nominal thickness mm |
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≤0.7 |
>0.7 |
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S250GD+Z |
250 |
330 |
17 |
19 |
1a |
a.bending center diameter is 4a in case of nominal thickness>1.5mm.
S250GD+Z hot dip galvanized automotive steel coating weight range:
Coating form |
Applicable surface structure |
Weight range of following coatings a g/m²(A/B) |
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Zinc coating |
Zn-Fe alloy coating |
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Equally coating |
Z, X, G, GX, N, R |
40/40~225/225 |
30/30~90/90 |
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Differential coating b |
N, R |
30~150(each side) |
- |
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a. 50 g/m² coating weight is equivalent to about 7.1 µm. |
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S250GD+Z hot dip galvanized automotive steel surface treatment:
1 Chromate treatment (L) |
Chromate treatment is a treatment with an aim to prevent white rusts formed on product surfaces during transportation and storage. |
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2 Oiling (Y) |
Oiling is to prevent white rusts formed on product surfaces during transportation and storage. |
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3 Chromate treatment + oiling (LY) |
This treatment with oiling after surface chromate treatment is to further avoid the forming of white rusts. |
We also produce the following grades of galvanized steel:
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Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
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Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
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Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
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SGCD1 |
0.12 |
0.50 |
0.60 |
0.040 |
0.030 |
0.025 |
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SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
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SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
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For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
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SGC400 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.150 |
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SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
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SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
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For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
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S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
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S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
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S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
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S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
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S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
