🟧 Product Overview
Electro‑galvanized steel coil (EG) is produced by applying zinc to cold‑rolled steel through an electrolytic coating process, resulting in:
- Extremely uniform zinc thickness
- Superior surface smoothness
- Excellent paintability and weldability
- High precision for deep‑drawing applications
Compared with hot‑dip galvanized steel (HDG), EG offers:
- Better surface appearance
- More accurate zinc thickness control
- Better suitability for automotive and electronics industries
🟧 International Standards
JIS G3313（Japan）
- SECC – Commercial quality
- SECD – Drawing quality
- SECE – Deep drawing quality
EN 10152（Europe）
ASTM A879（USA）
- Type A / Type B
- Electro‑zinc coated steel sheet
🟧 Zinc Coating Matrix（Electro‑Zinc Coating）
| Coating | Symbol | Zinc Thickness (μm) | Typical Use |
|---|
| ZE25 | 2.5 μm | Indoor, electronics |
| ZE50 | 5 μm | Appliances, general forming |
| ZE75 | 7.5 μm | Automotive interior |
| ZE100 | 10 μm | Automotive structural |
| ZE120 | 12 μm | High corrosion resistance |
🟧 Base Steel Grade Matrix
| Standard | Grade | Description | Formability |
|---|
| JIS G3313 | SECC | Commercial quality | ★★★ |
| JIS G3313 | SECD | Drawing quality | ★★★★ |
| JIS G3313 | SECE | Deep drawing | ★★★★★ |
| EN 10152 | DC01+ZE | General forming | ★★★ |
| EN 10152 | DC03+ZE | Drawing quality | ★★★★ |
| EN 10152 | DC04+ZE | Deep drawing | ★★★★★ |
🟧 Product Specifications
Dimensions
- Thickness: 0.25 – 2.0 mm
- Width: 600 – 1500 mm
- Coil ID: 508 / 610 mm
- Coil Weight: 3 – 10 MT
Surface Finishes
- Bright
- Matte
- Skin‑passed
- Chromated / Non‑chromated
- Oiled / Dry
🟧 Mechanical Properties (typical)
| Grade | Yield Strength | Tensile Strength | Elongation |
|---|
| SECC | 140–300 MPa | 270–410 MPa | ≥ 28% |
| SECD | 120–260 MPa | 260–380 MPa | ≥ 32% |
| SECE | 110–220 MPa | 260–350 MPa | ≥ 36% |
| DC01+ZE | 140–280 MPa | 270–410 MPa | ≥ 28% |
🟧 EG vs. HDG vs. Alu‑Zinc (Comparison)
| Property | EG (Electro‑Galvanized) | HDG (Hot‑Dip) | Alu‑Zinc (55% Al‑Zn) |
|---|
| Surface Quality | ★★★★★ | ★★★ | ★★★★ |
| Zinc Uniformity | ★★★★★ | ★★★ | ★★★★ |
| Corrosion Resistance | ★★★ | ★★★★ | ★★★★★ |
| Paintability | ★★★★★ | ★★★★ | ★★★★ |
| Deep Drawing | ★★★★★ | ★★★ | ★★★ |
| Best Use | Automotive, appliances | Construction | Coastal, high‑corrosion |
🟧 Applications
Automotive
- Interior panels
- Reinforcement parts
- Deep‑drawing components
Home Appliances
- Refrigerator panels
- Washing machine drums
- Microwave and oven housings
Electronics
- Computer casings
- TV back panels
- Electrical enclosures
Industrial
- Precision stamping
- Office furniture
- Lighting fixtures
🟧 Why Choose Electro‑Galvanized Steel Coil
- Ultra‑smooth surface
- Highly uniform zinc coating
- Excellent paint adhesion
- Superior weldability
- Ideal for deep‑drawing and precision forming
🟧 Why Choose WelSteels
- Full range of SECC / SECD / SECE / DC01+ZE
- Stable coating thickness and surface quality
- Advanced electrolytic coating lines
- SGS / BV inspection available
- Export‑grade seaworthy packaging
- Reliable delivery for global projects
