S320GD Galvanized Steel Coil
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.
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.
S320GD Galvanized Steel Coil Chemical Composition
| Element | Maximum Content (%) |
| Carbon (C) | 0.2 |
| Silicon (Si) | 0.6 |
| Manganese (Mn) | 1.7 |
| Phosphorus (P) | 0.1 |
| Sulfur (S) | 0.045 |
S320GD Galvanized Steel Coil Mecahmical Properties
| Property | Value |
| Tensile Strength (Rm) | 290 – 390 MPa |
| 0.2% Proof Strength (Rp0.2) | ≥ 320 MPa |
| Minimum Elongation (Lo = 80 mm) (A) | ≥ 17% |
Note:
The minimum elongation requirement varies with thickness:
- 0.5 mm < t ≤ 0.7 mm: The minimum elongation is reduced by 2% compared to the listed value.
- 0.35 mm < t ≤ 0.5 mm: The minimum elongation is reduced by 4% compared to the listed value.
- t ≤ 0.35 mm: The minimum elongation is reduced by 7% compared to the listed value.
The tensile strength range for this grade can vary by up to 140 MPa, depending on processing conditions and coating specifications.
Features
S320GD galvanized steel could bring the following benefits to your project:
Tough Against Rust – Stands up to weather and doesn't rust easily.
Lasts Long – The zinc layer keeps it going strong for years.
Super Strong – Built to handle heavy-duty jobs without bending or breaking.
Saves Money – Less maintenance needed, so it's cost-effective.
Multi-Purpose – Fits a wide range of uses, from buildings to cars.
Easy to Shape – Flexible enough for all kinds of projects.
Easy to Weld – Works well with welding, so no hassle in production.
Clean Look – Smooth surface that looks good in visible applications.
Zinc Thickness
| Zinc Coating Grade | Zinc Coating (g/m²) | Corrosion Resistance | Typical Applications | Remarks |
| Z30 | 30 | Very low | Indoor parts, home appliance inner panels, ventilation ducts | Not suitable for outdoor use |
| Z60 | 60 |
Low |
Indoor structures, temporary facilities | Low cost |
| Z80 | 80 | Medium | Light steel structures, base metal for PPGI | Good cost performance |
| Z100 | 100 | Medium | PPGI, fencing, general construction
|
Common export grade |
| Z120 | 120 | Medium-High |
|
Longer service life |
| Z140 | 140 | Medium-High | Industrial buildings, agricultural facilities | Suitable for outdoor use |
| Z180 | 180 | High | Long-term outdoor structures, equipment housings
|
Recommended for outdoor use |
| Z200 | 200 | Very high | Humid environments, heavy structures
|
Higher cost |
| Z275 | 275 | Excellent
|
Coastal areas, solar mounting systems, high-corrosion environments | High standard |
FAQ:
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.
Is S320GD suitable for cold forming?
Yes. S320GD has good formability and is suitable for roll forming, bending, and cold shaping processes.
What thickness range is available for S320GD galvanized steel?
S320GD galvanized steel is commonly available from thin gauges (around 0.35 mm) up to structural thicknesses of 6.0 mm or more, depending on supply capability.
What surface finishes are available for S320GD galvanized steel?
Typical surface finishes include regular spangle, minimized spangle, and zero spangle, depending on application requirements.
