S250GD galvanized steel sheet/plate
S250GD galvanized steel sheet/plate is a low-alloy, high-strength hot-rolled steel, commonly used in construction, automotive, and appliance industries. Its main components include iron and low carbon content, typically between 0.06%-0.12%. The steel sheet/plate is coated with a zinc layer through hot-dip galvanizing, which provides a uniform protective barrier against corrosion.
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.
In construction, the S250GD sheet/plate is often used for roofing and wall panels, while in the automotive sector, it's favored for body and chassis components due to its weight-saving and durability benefits.
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. |
S250GD+Z hot dip galvanized automotive steel surface quality:
Code No. |
Features |
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FB(O3) |
It is allowed for the existence of small erosion spots, dark spots, strip marks, minor chromate treatment defects and small zinc particles. |
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FC(O4) |
No erosion spot is allowed. However, it is allowed for the existence of light impression, scratches, zinc flow ripple marks, minor chromate treatment defects in small range, while the other side must reach FB requirements at least. |
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FD(O5) |
One side of relatively good quality must further restrict on defects, namely appearance quality after painting is not affected, and the other side must FB requirements at least. |
GNEE STEEL also produces galvanized products of other grades:
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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 |
