S320GD galvanized steel
Looking for a comprehensive guide to S320GD galvanized steel technical specs? You've come to the right place. As a direct factory with 20 years of structural steel experience, GNEE Steel supplies EN 10346 compliant S320GD+Z sheets/coils at factory prices.
In this guide, we'll break down key specifications-from chemical composition to mechanical properties-helping you understand why this high-strength galvanized steel is trusted for global projects. First, let's clarify: S320 refers to minimum yield strength (320MPa), while "GD" denotes structural grade for general purposes.
S320GD galvanized steel
What Is S320GD Galvanized Steel?
S320GD galvanized steel is a high-strength structural steel coated with zinc via hot-dip galvanizing, compliant with EN 10346 (European standard for cold-rolled coated flat products).
The galvanizing process (Z/ZA/ZM coatings) forms a protective layer against corrosion, extending service life by 10-30 years vs. uncoated steel. It's widely used in construction, automotive, and solar industries due to its balanced strength and formability.
GNEE's S320GD+Z products meet strict quality controls, with 3rd-party inspection (SGS/BV) available for critical projects.
S320GD Galvanized Steel Chemical Composition (EN 10346)
The chemical makeup of S320GD galvanized steel is optimized for strength, weldability, and coating adhesion:
|
Element |
Content (wt%) |
Function in Technical Performance |
|
Carbon (C) |
≤0.12 |
Ensures weldability; avoids brittleness in structural parts |
|
Silicon (Si) |
≤0.50 |
Enhances strength without reducing ductility |
|
Manganese (Mn) |
≤1.60 |
Boosts tensile strength and formability |
|
Phosphorus (P) |
≤0.025 |
Minimizes brittle fracture risk |
|
Sulfur (S) |
≤0.025 |
Prevents welding cracks and improves durability |
|
Aluminum (Al) |
≥0.020 |
Promotes zinc coating adhesion and grain refinement |
|
Nitrogen (N) |
≤0.015 |
Maintains structural uniformity |
Mechanical Properties of S320GD Galvanized Steel
Mechanical specs define its performance under stress-critical for structural and load-bearing applications:
|
Technical Property |
Value |
Test Standard |
Application Relevance |
|
Yield Strength (σs) |
≥320MPa (≤3mm) / ≥300MPa (>3mm) |
EN 10002-1 |
Supports heavy loads in beams/frames |
|
Tensile Strength (σb) |
400-550MPa |
EN 10002-1 |
Resists deformation under pressure |
|
Elongation (A80) |
≥22% |
EN 10002-1 |
Enables bending/stamping for complex shapes |
|
Impact Energy (KV) |
≥27J (-20°C) |
EN 10045-1 |
Withstands low temperatures and dynamic impacts |
|
Hardness (HV) |
120-160 |
EN ISO 6507-1 |
Balances wear resistance and processability |
S320GD Galvanized Steel Size & Coating Specifications
GNEE Steel offers flexible dimensions and coating options to match technical requirements:
-
Standard Size Range
|
Form |
Thickness (mm) |
Width (mm) |
Length/Coil Weight |
|
Sheets |
0.1-100 |
600-3000 |
1000-12000mm |
|
Coils |
0.1-20 |
600-2000 |
3-30 tons |
-
Zinc Coating Technical Options
|
Coating Type |
Zinc Weight (g/m²) |
Technical Advantage |
|
Z (Pure Zinc) |
50-225 |
Cost-effective corrosion protection |
|
ZA (Zinc-Aluminum) |
100-200 |
Superior resistance to coastal/humid environments |
|
ZM (Zinc-Magnesium) |
80-180 |
Highest durability for harsh industrial conditions |
Understanding the technical specifications of S320GD galvanized steel-from chemical composition to mechanical properties-ensures you select the right material for your project's needs. GNEE Steel's EN 10346 compliant products, flexible sizes, and reliable coatings deliver consistent performance.
Whether you're sourcing for structural engineering or manufacturing, our factory-direct prices and technical support simplify procurement. Get your 2026 S320GD galvanized steel factory price list + technical data sheet – Contact our team now!
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- 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 |