galvanized steel
Looking for trusted galvanized steel plate manufacturers in China? You've come to the right place. As a direct factory with 20 years of structural steel experience, GNEE Steel supplies EN 10346 compliant sheets at factory prices. Understanding how DX51D+Z275 galvanized steel plate compares to other grades helps you select the optimal material for your project.
Galvanized steel grades differ in two key aspects: base material properties (strength, formability) and zinc coating weight (corrosion resistance). Choosing the right grade depends on your application environment, structural requirements, and budget.
DX51D+Z275 is part of the DX series, known for excellent formability, with the highest zinc coating weight in its class (275g/m²).
Galvanized steel plate
Coating Weight Comparison: DX51D+Z275 vs Common Grades
Zinc coating weight directly impacts corrosion resistance and service life.
| Grade | Zinc Coating Weight (g/m²) | Coating Thickness (μm) | Corrosion Resistance Level | Expected Service Life (Outdoor) |
|---|---|---|---|---|
| DX51D+Z60 | ≥ 60 | ≥ 8.5 | Basic | 5 - 8 years |
| DX51D+Z120 | ≥ 120 | ≥ 16.9 | Good | 10 - 15 years |
| DX51D+Z200 | ≥ 200 | ≥ 28.3 | Very Good | 15 - 20 years |
| DX51D+Z275 | ≥ 275 | ≥ 38.8 | Excellent | 20 - 25 years |
| DX51D+Z350 | ≥ 350 | ≥ 49.5 | Superior | 25 - 30 years |
Mechanical Properties Comparison
Base material properties determine structural performance and fabrication capabilities.
| Property | DX51D+Z275 | DX52D+Z275 | S350GD+Z275 | Key Difference |
|---|---|---|---|---|
| Yield Strength (MPa) | ≤ 340 | ≤ 340 | ≥ 350 | S350GD+Z275 offers higher strength |
| Tensile Strength (MPa) | 270 - 410 | 270 - 410 | 420 - 550 | S350GD+Z275 has higher tensile strength |
| Elongation (%) | ≥ 28 | ≥ 25 | ≥ 18 | DX51D+Z275 provides best formability |
| Formability | Excellent | Very Good | Good | DX51D+Z275 suits complex shapes |
| Weldability | Excellent | Excellent | Very Good | All grades offer good weldability |
Application Suitability by Environment
Selecting the right grade depends on the environmental conditions your project will face.
| Application Environment | Recommended Grade | Rationale | Cost-Effectiveness |
|---|---|---|---|
| Indoor Dry Environments | DX51D+Z120 | Sufficient protection at lower cost | Most cost-effective |
| Indoor Humid Areas | DX51D+Z200 | Extra protection against moisture | Good balance |
| Outdoor Temperate Climates | DX51D+Z200 | Adequate for moderate weather | Balanced choice |
| Outdoor Coastal/Marine | DX51D+Z275 | Superior saltwater corrosion resistance | Best long-term value |
| Industrial Environments | DX51D+Z275 | Resists chemical exposure and pollution | Cost-effective protection |
| Extreme Environments | DX51D+Z350 | Maximum protection for harsh conditions | Higher cost but necessary |
Cost-Benefit Analysis by Grade
Balancing initial cost with long-term value is crucial for project success.
| Grade | Initial Cost (Relative) | Maintenance Cost (Relative) | Service Life (Years) | Total Lifecycle Cost (Relative) | Best For |
|---|---|---|---|---|---|
| DX51D+Z120 | 100% | 150% | 10-15 | 130% | Indoor, low-budget projects |
| DX51D+Z200 | 115% | 120% | 15-20 | 118% | General outdoor use |
| DX51D+Z275 | 130% | 100% | 20-25 | 108% | Coastal, industrial, long-term projects |
| DX51D+Z350 | 150% | 90% | 25-30 | 112% | Extreme environments only |
| S350GD+Z275 | 140% | 100% | 20-25 | 115% | Structural applications needing strength |
The DX51D+Z275 galvanized steel plate offers the optimal balance of corrosion resistance, formability, and cost-effectiveness for harsh environments like coastal areas and industrial facilities. While it has a slightly higher initial cost, its extended service life and lower maintenance requirements provide superior long-term value. Contact GNEE Steel to discuss which grade best fits your specific application needs!
- 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 |