In the fields of construction and manufacturing, hot-dip galvanized steel sheets are favored for their excellent corrosion resistance and attractive appearance. Among them, S350GD+Z and S280GD+Z are two widely used grades. While they share similar processing methods, their performance and application scenarios differ significantly. This article highlights the key differences to help you choose the right material for your project.
1. Overview of S350GD+Z and S280GD+Z
- S350GD+Z
A high-strength galvanized steel sheet with a yield strength of 350 MPa, designed for heavy-duty structural applications. The “GD” indicates hot-dip galvanization, and “Z” refers to a pure zinc coating. - S280GD+Z
A medium-strength steel sheet with a yield strength of 280 MPa, suitable for general construction and light industrial applications. It shares the same coating process as S350GD+Z.
2. Performance Comparison
| Feature | S350GD+Z | S280GD+Z |
|---|---|---|
| Yield Strength | 350 MPa | 280 MPa |
| Tensile Strength | Higher | Moderate |
| Corrosion Resistance | Excellent (thicker coating + strength) | Good |
| Formability | Moderate | Better for bending/forming |
3. Recommended Applications
- S350GD+Z is ideal for:
- High-rise buildings and steel frames
- Long-span bridges and heavy machinery
- Marine and offshore structures
- Any application requiring high load-bearing performance
- S280GD+Z is suitable for:
- General building components
- Light machinery and equipment housings
- Roofing, wall cladding, and enclosures
- Projects with lower structural demands and budget constraints
4. Conclusion & Buying Advice
If your project involves structural loads, harsh environments, or long-term durability, S350GD+Z offers better performance and safety. For standard construction needs where cost efficiency matters, S280GD+Z is a reliable and economical choice.
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