DX53D/SGCD2/SGCD3 Galvanized Steel Sheets: High-Strength Corrosion Resistance for Demanding Applications
DX53D/ SGCD2/SGCD3 Galvanized Sheet Product Overview
DX53D (EN 10346) and SGCD2/SGCD3 (JIS G3302) galvanized steel sheets are advanced cold-rolled materials engineered for industries requiring exceptional formability and long-term corrosion protection. Featuring zinc coatings from 60-275g/m² (Z60-Z275), these sheets deliver 800+ hours of salt spray resistance (ISO 9227) while maintaining precise dimensional tolerances (±0.02mm). Widely used in automotive body panels, appliance housings, and architectural cladding, they outperform standard galvanized steels in deep-drawing applications due to optimized alloy compositions.
Key Technical Specifications
1. Material Grades & Standards
| Grade | Standard | Key Application |
|---|---|---|
| DX53D+Z | EN 10346 | Automotive fuel tanks |
| SGCD2 | JIS G3302 | HVAC ducting systems |
| SGCD3 | JIS G3302 | Solar panel mounting frames |
2. Dimensional Parameters
- Thickness: 0.12mm (ultra-thin electronics components) to 6.00mm (structural supports)
- Width: 600-1,500mm (compatible with roll-forming machines)
- Zinc Coating:
- Z60 (60g/m²): 8.4µm layer for indoor environments
- Z275 (275g/m²): 38.5µm layer for coastal infrastructure
3. Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (A80%) |
|---|---|---|---|
| DX53D | 140-260 | 270-380 | ≥30% |
| SGCD2 | 180-260 | 300-420 | ≥28% |
| SGCD3 | 160-240 | 280-400 | ≥32% |
Advanced Material Properties
- Enhanced Formability
- r-value (plastic anisotropy): 2.1 (DX53D) vs 1.6 (standard DX51D)
- Limiting drawing ratio (LDR): 2.4:1 enables complex geometries
- Weldability Performance
- Recommended parameters for MIG welding:
- Wire: ER70S-6 (1.2mm diameter)
- Voltage: 18-22V
- Travel speed: 45-60 cm/min
- Recommended parameters for MIG welding:
- Surface Finish Options
- Zero-spangle (RA 0.4µm) for Class A painted surfaces
- Regular spangle (RA 1.5µm) for architectural aesthetics
Chemical Composition Analysis
DX53D (EN 10346)
| Element | C | Mn | P | S | Al |
|---|---|---|---|---|---|
| Content | ≤0.12% | ≤0.60% | ≤0.10% | ≤0.045% | ≥0.020% |
SGCD2/SGCD3 (JIS G3302)
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| SGCD2 | ≤0.10% | ≤0.50% | ≤0.45% | ≤0.030% | ≤0.030% |
| SGCD3 | ≤0.08% | ≤0.50% | ≤0.45% | ≤0.030% | ≤0.030% |
The controlled carbon content in SGCD3 enables 15% higher elongation compared to SGCD2, making it ideal for components requiring multiple bending operations.
Environmental Durability Guide
| Exposure Condition | Recommended Solution | Expected Service Life |
|---|---|---|
| Indoor dry environments | Z60 + chromate passivation | 20-25 years |
| Automotive underbodies | Z180 + epoxy primer | 12-15 years |
| Offshore structures | Z275 + PVDF coating | 30+ years |
Surface Treatment Comparison
| Code | Process | Key Advantage |
|---|---|---|
| C | Chromic acid treatment | 240hr salt spray resistance |
| Q | Phosphating + oiling | Superior paint adhesion |
| S | Chromate + oiling | Scratch protection during transit |
Industry-Specific Applications
- Automotive Manufacturing
- Door inner panels (DX53D Z140 withstands 500,000+ stamping cycles)
- Chassis components (SGCD2 Z200 resists road salt corrosion)
- Renewable Energy Systems
- Solar tracker frames (SGCD3 Z275 achieves 25-year coastal durability)
- Wind turbine housings (DX53D Z180 with 180° bend capability)
- Construction Engineering
- Perforated ceiling panels (0.4mm Z60 sheets with ±0.1mm hole precision)
- Standing seam roofs (0.7mm Z275 withstands 160km/h winds)
Competitive Advantages
- Precision Tolerances: ±0.5% on thickness for high-speed stamping
- Custom Processing: Available in coil, sheet, or pre-cut blanks
- Global Certifications: Complies with REACH, RoHS, and ISO 14001
Technical Support Services
- Finite element analysis (FEA) for part optimization
- Salt spray testing reports upon request
- On-site welding parameter consultation
By combining advanced metallurgical engineering with precision coating technologies, DX53D/SGCD2/SGCD3 galvanized sheets provide unmatched performance in corrosive environments while maintaining cost-efficiency for high-volume production.
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