DX52D/SGCD1 Galvanized Steel Sheets: Advanced Corrosion Resistance & Formability
DX52D/SGCD1 Galvanized Sheet Product Overview
DX52D (EN 10346) and SGCD1 (JIS G3313) galvanized steel sheets are high-performance cold-rolled materials optimized for precision forming in automotive, appliance, and construction applications. Featuring a zinc coating range of 60-275g/m², these sheets combine enhanced bendability (r-value up to 2.1) with 600+ hours salt spray resistance (ISO 9227). The DX52D grade specifically offers 30% better deep-drawing performance than standard DX51D, while SGCD1’s ultra-low carbon content (≤0.12%) ensures crack-free stamping for complex geometries.
Key Technical Specifications
1. Material Grades & Standards
Grade |
Standard |
Equivalent Grades |
Key Application |
DX52D+Z |
EN 10346 |
S220GD (EU) |
Automotive panels |
SGCD1 |
JIS G3313 |
SGCC (Japan) |
Appliance housings |
2. Dimensional Parameters
- Thickness: 0.12mm (ultra-thin) to 6.00mm (±0.03mm tolerance)
- Width: 600-1,500mm (custom slit edges available)
- Coating Weight:
- Z100 (100g/m²) = 14μm zinc layer
- Z275 (275g/m²) = 38.5μm zinc layer
3. Mechanical Properties
Grade |
Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation (A80) |
DX52D |
140-300 |
270-420 |
≥26% |
SGCD1 |
180-260 |
300-420 |
≥30% |
Advanced Surface Treatments
To optimize performance across environments:
Code |
Treatment |
Corrosion Resistance |
Key Benefit |
C |
Chromate passivation |
500-800hrs (salt spray) |
REACH-compliant, no hexavalent Cr |
Q |
Phosphating + oiling |
300-500hrs |
Class 1 paint adhesion (ISO 2409) |
O |
Oiling only |
72-120hrs |
Scratch protection during handling |
Chemical Composition Analysis
DX52D (EN 10143)
Element |
C |
Mn |
P |
S |
Al |
Content |
≤0.12% |
≤0.60% |
≤0.10% |
≤0.045% |
≥0.020% |
SGCD1 (JIS G3313)
Element |
C |
Si |
Mn |
P |
S |
Content |
≤0.12% |
≤0.50% |
≤0.60% |
≤0.040% |
≤0.030% |
The controlled carbon content minimizes strain aging, critical for components requiring repeated bending.
Environmental Adaptability Guide
Application Environment |
Recommended Coating |
Service Life* |
Indoor dry storage |
Z60 + Chromate (C) |
15-20 years |
Automotive underbody |
Z180 + Q treatment |
10-12 years |
Coastal architecture |
Z275 + PVDF topcoat |
25+ years |
Based on ISO 12944-2 corrosion categories C3-C5
Forming & Fabrication Advantages
- Deep Drawing Performance
- Limiting drawing ratio (LDR): 2.3:1 (DX52D) vs 2.0:1 (DX51D)
| Grade | r-value | n-value |
|———|———|———|
| DX52D | 1.9 | 0.22 |
| SGCD1 | 2.1 | 0.20 |
- Welding Compatibility
- Resistance welding: 8-12kA current range
- Laser welding speed: 4m/min (1mm thickness)
- Surface Finish Options
- Zero spangle (Ra 0.5μm) for high-gloss painting
- Regular spangle (Ra 1.2μm) for architectural aesthetics
Certifications & Compliance
- ISO 9001:2015 quality management system
- RoHS/REACH compliant (Pb/Cd/Phthalate-free)
- Meets EU Construction Products Regulation 305/2011
Industry Applications
- Automotive Manufacturing
- Door inners (DX52D Z180 withstands 1M+ stamping cycles)
- Chassis components (SGCD1 Z275 resents road salt corrosion)
- Appliance Engineering
- Refrigerator liners (Z100 coating + Q treatment)
- Washing machine drums (DX52D Z150 with 180° hemming)
- Building Systems
- Standing seam roofs (Z275 + SMP coating, 50-year warranty)
- Solar panel frames (SGCD1 Z200, 35% lighter than aluminum)
Competitive Analysis
Parameter |
DX52D Z150 |
SGCD1 Z180 |
ASTM A653 G90 |
Yield Strength |
220 MPa |
240 MPa |
230 MPa |
Salt Spray Hours |
720 |
600 |
480 |
Cost/Ton (USD) |
$1,050 |
$980 |
$1,200 |
Key advantage: DX52D offers 20% better corrosion resistance than G90 at 15% lower cost
Sustainability Features
- 88% recycled steel content in substrate
- Zinc recovery rate ≥99.5% in galvanizing process
- Water-based pretreatment chemicals (VOC <30g/m²)
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