DX52D/SGCD1 Galvanized Coil Product Overview
The DX52D/SGCD1 Galvanized Coil is a cold-rolled carbon steel substrate coated via continuous hot-dip galvanizing (60–275 g/m² zinc layer). Compliant with EN 10346 (DX52D) and JIS G3302 (SGCD1) standards, it combines 140–300 MPa yield strength and ≥26% elongation for demanding stamping, deep drawing, and structural applications. With a zinc purity of 99.9% and controlled trace elements (Al: 0.15–0.22%), this coil delivers 10–25 years of corrosion resistance in moderate environments, ideal for automotive body panels, HVAC systems, and agricultural machinery.
Technical Specifications
1. Dimensional & Coating Properties
- Base Steel Thickness: 0.12–3.5 mm (±5% tolerance per ASTM A924)
- Width: 600–1,500 mm (custom slit for precision tooling)
- Zinc Coating Weight:
- Z60: 60 g/m² (8 µm) for indoor appliances
- Z275: 275 g/m² (38 µm) for coastal infrastructure
- Surface Finish:
- Zero Spangle (Z): Smooth, spangle-free (Ra ≤0.8 µm) for painting
- Minimized Spangle (M): Fine crystalline texture (Ra 1.2–2.5 µm)
- Normal Spangle: Aesthetic for non-critical applications
2. Chemical Composition
| Grade (EN 10346) | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Ti (%) |
|---|---|---|---|---|---|---|
| DX52D+Z | ≤0.12 | ≤0.50 | ≤0.60 | ≤0.10 | ≤0.045 | ≤0.30 |
| SGCD1 (JIS) | ≤0.12 | ≤0.50 | ≤0.60 | ≤0.04 | ≤0.03 | ≤0.025 |
Key Features:
- Ultra-Low Carbon: Enhances weldability (8–12 kA spot welding current).
- Manganese Control: Balances ductility and tensile strength.
Mechanical Performance
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| DX52D+Z | 140–300 | 270–420 | ≥26 |
| SGCD1+Z | ≥220 | ≥300 | ≥22 |
| S550GD+Z | ≥550 | ≥550 | – |
Functional Metrics:
- Bendability: 0T–2T (180° bend @ 0.5 mm thickness).
- Deep Drawing: 8–12% limit drawing ratio (LDR).
- Impact Resistance: 30 J/cm² at -20°C (ISO 148-1).
Applications by Industry
| Industry | Use Case | Recommended Coating |
|---|---|---|
| Automotive | Door panels, fuel tanks | Z180 (180 g/m²) + Chromate-free passivation |
| Construction | Roofing, gutters | Z275 (275 g/m²) + Phosphating |
| Agriculture | Grain silos, machinery parts | Z200 (200 g/m²) + Oiling |
| Electronics | Server racks, enclosures | Z100 (100 g/m²) + Untreated |
Surface Treatment Options
| Code | Treatment | Features | Applications |
|---|---|---|---|
| C | Chromic Acid Passivation | RoHS-compliant, unpainted use | Outdoor electrical cabinets |
| P | Phosphating + Sealing | Enhances paint adhesion (5–7 µm primer) | Automotive body panels |
| O | Anti-Fingerprint Oiling | Prevents white rust during storage | Export packaging |
| M | Untreated | Immediate post-painting readiness | Custom fabrication projects |
Environmental Compliance:
- RoHS-Certified: Hexavalent chromium-free (EN 10346-C5).
- VOC Emissions: <50 g/L (GreenGuard Gold compliant).
Global Standard Equivalents
| China (GB) | Europe (EN) | USA (ASTM) | Japan (JIS) |
|---|---|---|---|
| DC52D+Z | DX52D+Z | A653 SS33 | SGCD1 |
| S350GD+Z | S350GD+Z | A653 SS345 | SGHC340 |
| S550GD+Z | S550GD+Z | A653 SS550 | SGHC550 |
Sustainability & Certifications
- Recycled Content: 25–35% (ISO 14021 compliant).
- Carbon Footprint: ≤1.4 tons CO₂ per ton of steel.
- Certifications: LEED v4.1, REACH, ISO 9001.
Packing And Delivery
