NEWS
For construction and industrial projects in cold climates (temperatures as low as -40°C), GNEE Steel's S320GD galvanized steel sheet has proven to be an indispensable material, thanks to its exceptional low-temperature toughness and resistance to brittle fracture. Unlike many structural steels that lose ductility in freezing conditions, S320GD maintains its performance even in extreme cold, making it ideal for arctic warehouses, cold-storage facilities, and offshore structures in northern regions.
Galvanized steel sheet
The low-temperature toughness of S320GD is rooted in its optimized chemical composition and manufacturing process. Strict control of phosphorus content (≤0.10%) and the use of microalloying elements (e.g., manganese) prevent the formation of brittle phases in the steel, ensuring it retains its elongation rate (≥20%) and impact resistance at sub-zero temperatures. Additionally, the hot-dip zinc coating remains intact in cold environments, avoiding peeling or cracking that can lead to corrosion.
In third-party tests conducted at -40°C, S320GD demonstrated a Charpy V-notch impact energy of ≥27J-well above the industry minimum of 20J-confirming its ability to withstand sudden impacts (e.g., wind loads, equipment collisions) without fracturing. This performance, combined with its high yield strength (≥320MPa) and corrosion resistance, makes it the top choice for cold-climate structural projects.
Below is a summary of S320GD's low-temperature performance test results:
| Test Condition | Test Method | S320GD Performance | Industry Standard (Minimum) |
|---|---|---|---|
| Low-Temperature Impact Energy (-40°C) | Charpy V-Notch | ≥27J | ≥20J |
| Elongation at -30°C | Tensile Test | ≥18% | ≥15% |
| Coating Adhesion at -40°C | Bend Test (180°) | No Peeling | No Peeling |
| Brittle Fracture Resistance (-40°C) | Drop Weight Test | No Fracture | No Fracture |
"Cold climate projects present unique challenges-materials must be strong, corrosion-resistant, and tough enough to handle freezing temperatures," said a technical sales manager at GNEE Steel. "Our S320GD galvanized steel sheets have been used in cold-storage facilities and arctic construction projects worldwide, with zero reports of brittle fracture or performance degradation."
GNEE Steel offers S320GD in thicknesses ranging from 0.8mm to 3.0mm, with zinc coating grades Z180-Z350 to match the corrosion risks of different cold-climate environments. We also provide detailed low-temperature performance certificates for project compliance. Contact us now to discuss your cold-climate project requirements and secure a factory-direct 2026 price quote for S320GD!
- 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 |