DX51D Z150 Galvanized Coil Product Overview
The DX51D Z150 Galvanized Coil is a cold-rolled carbon steel substrate coated with a 150 g/m² zinc layer (≈21 µm thickness) via the hot-dip galvanizing process. Designed for stamping, bending, and profiling applications, this EN 10346-compliant material (steel grade 1.0917) combines 240–380 MPa yield strength with ≥22% elongation, making it ideal for automotive panels, HVAC systems, and agricultural equipment. Its self-healing zinc coating ensures 15–30 years of corrosion resistance in moderate environments, outperforming electrogalvanized steel by 3x in durability.
Key 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 stamping dies)
- Length: Standard 508 mm/610 mm or customized up to 6,000 mm
- Zinc Coating:
- Z150: 150 g/m² (21 µm) for suburban/light industrial use
- Zinc Layer Options: 60–275 g/m² (8–80 µm)
- 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)
2. Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Ti (%) |
|---|---|---|---|---|---|---|
| Limit | ≤0.12 | ≤0.50 | ≤0.60 | ≤0.10 | ≤0.045 | ≤0.30 |
Key Alloy Benefits:
- Low Carbon Content: Enhances weldability and formability.
- Controlled Manganese: Balances strength and ductility.
Mechanical Performance
| Property | DX51D Z150 | DX52D Z150 | DX53D Z150 | S350GD Z150 |
|---|---|---|---|---|
| Yield Strength (MPa) | 240–380 | 140–300 | 140–260 | ≥350 |
| Tensile Strength (MPa) | 270–500 | 270–420 | 270–380 | ≥420 |
| Elongation (%) | ≥22 | ≥26 | ≥30 | ≥16 |
Functional Metrics:
- Bendability: 0T–2T (180° bend at 0.8 mm thickness).
- Weldability: 8–12 kA spot welding current (15% lower than bare steel).
- Impact Resistance: 35 J/cm² at -20°C (ISO 148-1).
Corrosion Resistance by Environment
| Environment | Recommended Coating | Salt Spray Resistance |
|---|---|---|
| Indoor (Dry) | Z10 (100 g/m²) | 800–1,000 hours |
| Suburban | Z20 + Paint (200 g/m²) | 1,500–2,000 hours |
| Industrial/Urban | Z27 (270 g/m²) | 2,500+ hours |
| Coastal | Z27 + Paint | 3,000+ hours |
Surface Treatment Options
| Code | Treatment | Features | Applications |
|---|---|---|---|
| C | Chromic Acid Passivation | Hexavalent chromium-free, RoHS-compliant | Automotive chassis |
| P | Phosphating + Sealing | Enhances paint adhesion (5–7 µm primer) | Pre-painted roofing panels |
| O | Oiling (Anti-Fingerprint) | Prevents white rust during storage | Export packaging |
| M | Untreated | Immediate post-painting readiness | Custom fabrication projects |
Global Standard Equivalents
| China (GB) | Japan (JIS) | Europe (EN) | USA (ASTM) |
|---|---|---|---|
| DC51D+Z | SGCC | DX51D+Z | A653 CS Type B |
| S350GD+Z | SGC340 | S350GD+Z | A653 SS345 |
| S550GD+Z | SGC490 | S550GD+Z | A653 SS550 |
Applications
- Construction: Roofing, gutters, and structural cladding.
- Automotive: Body panels, fuel tanks, and exhaust shields.
- Agriculture: Grain silos, livestock fencing, and machinery parts.
- Appliances: Washing machine drums, refrigerator liners.
Sustainability & Certifications
- Recycled Content: 25–35% (ISO 14021 compliant).
- Carbon Footprint: ≤1.4 tons CO₂ per ton of steel.
- Certifications: RoHS, REACH, LEED v4.1, ISO 9001.
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Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.
