S320GD Hot-dip Galvanized Steel
Hot-dip galvanized S320GD steel is a versatile and durable material. It is dependable for building structures and serves as a durable option for exterior use.
GNEE STEEL, a leader in the steel industry, provides high-quality S320GD steel products tailored to meet the diverse needs of our clients. Our products offer exceptional value and performance.
Hot dip galvanized S320GD steel is a high-strength steel. "320" indicates the minimum yield strength of 320 MPa. S320GD steel is widely recognized for its excellent formability, strength, and superior corrosion protection. It can be produced through hot rolling and cold rolling, with a hot dip galvanizing treatment applied. It is extensively utilized in fields such as the vehicle manufacturing and building industries.
Properties
S320GD combines high strength with good formability and corrosion resistance. The minimum yield strength Rp0.2 of 320 N/mm² and a characteristic tensile strength (Rm) of at least 390 N/mm² ensure reliable load-bearing capacity even under changing load conditions. The elongation at break A80 of at least 17 % also allows safe forming and profiling processes.
The hot-dip galvanizing options offer the following specific advantages:
+Z (pure galvanized):
Standard corrosion protection for general conditions.
+ZF (zinc-iron):
Improved coating adhesion and increased resistance to mechanical stress.
+ZA (zinc-aluminium):
Optimized resistance in atmospheric environments.
+ZM (zinc-magnesium):
Extended protection in maritime and saline zones through passivating behavior.
+AZ (aluminum-zinc):
Combination of heat resistance and corrosion protection, ideal for high surface temperatures.
+AS (aluminum-silicon):
Especially for applications with extreme temperature influences and high corrosion loads.
In addition, S320GD has a homogeneous microstructure, good weldability and excellent dimensional stability, which enables precise further processing in cutting, bending and welding processes.
Features
S320GD galvanized steel could bring the following benefits to your project:
No Rust – Keeps your steel rust-free for longer.
Super Strong – Handles heavy loads and tough environments.
Affordable – Great value for the price-long-lasting and cost-effective.
Tough as Nails – Resists impacts and stays strong over time.
Easy to Shape – Cuts, bends, and welds without hassle.
Versatile – Perfect for construction, automotive, appliances, and more.
Looks Good – Smooth, clean finish that looks sharp.
Eco-Friendly – Coating is recyclable, supporting sustainability.
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 |
Mechanical Properties
|
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 |
- |
FAQ:
What is S320GD galvanized steel mainly used for?
It is widely used in construction structures, steel framing, roofing systems, industrial equipment, and support components.
What standards cover S320GD galvanized steel?
S320GD is commonly produced according to international galvanized steel standards such as EN specifications for structural galvanized steel.
What is Z275 coating in S320GD+Z275?
Z275 indicates a zinc coating mass of 275 g/m² (total both sides), providing strong corrosion protection for outdoor and structural use.
Is Z275 enough for outdoor applications?
Yes. Z275 is suitable for most outdoor environments, including urban and rural areas. For coastal or highly corrosive environments, higher zinc coatings may be recommended.
What is the difference between S320GD and lower-grade galvanized steel?
S320GD offers higher yield strength and better load-bearing capacity while maintaining good formability and corrosion resistance.
Can S320GD galvanized steel be welded?
Yes. S320GD can be welded using standard welding methods, but proper ventilation and surface preparation are recommended due to the zinc coating.
