SECC (Electro-Galvanized Commercial Cold-Rolled Steel) is a corrosion-resistant, cold-rolled steel grade designed for applications requiring good formability and moderate strength. It features a uniform zinc coating that protects against rust and oxidation, ensuring durability in industrial and consumer products. SECC provides excellent formability for deep drawing and complex shaping, good weldability for efficient assembly, and a smooth surface finish suitable for appliances, automotive components, electronics enclosures, and metal furniture.
SECC Steel Grades
High-Quality Electro-Galvanized Steel for Versatile Manufacturing and Structural Use
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SECC Steel Technical Specifications & Applications
Table of Contents
1. Typical Uses & Selection Guidance
- SECC Overview SECC (Electro-Galvanized Commercial Cold-Rolled Steel) is a corrosion-resistant cold-rolled steel grade designed for applications requiring moderate strength and excellent formability. It offers reliable mechanical properties for general manufacturing and consumer products.
- Corrosion Protection SECC features a uniform zinc coating that protects against rust and oxidation in industrial or indoor environments. The coating provides a smooth surface suitable for painting or further processing.
- Forming Advantages SECC provides good elongation, high formability, and excellent bendability. It allows efficient bending, cutting, and shaping for appliances, automotive components, electronics enclosures, and metal furniture. Strict production standards ensure consistent performance and reliability.
2. Technical Specifications Table
1. Chemical Composition Requirements (Maximum %)
| Steel Grade | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Titanium (Ti) |
|---|---|---|---|---|---|---|
| SECC | ≤ 0.20% | ≤ 0.03% | ≤ 1.20% | ≤ 0.03% | ≤ 0.03% | Not specified |
2. Mechanical Property Requirements (Maximum Values)
| Steel Grade | Min. Yield Strength (MPa) | Min. Tensile Strength (MPa) | Min. Elongation (%) Lo=80 mm | Bend Angle (°) | Mandrel Diameter (× Thickness t) |
|---|---|---|---|---|---|
| SECC | 180 | 260–350 | ≥28% | 180° | 2t |
3. Mechanical Property Requirements (Maximum Values)
| Coating Class | Mandrel Diameter (× Thickness t) |
|---|---|
| Z100, Z200 | 1t |
| Z275, Z350, Z450, AZ150, AZ200, AM100, AM125, AM150, AM175, AM200, AM225 | 2t |
| Z600 | 3t |
4. Applicable Hot-Dip Metallic Coating Types
| Coating Class | Composition (%) | Key Features |
|---|---|---|
| Z (Zinc) | ≥99% Zinc | Basic corrosion protection; suitable for general use. |
| ZA (Zinc-Aluminium) | 95% Zn, 5% Al | Improved corrosion resistance over pure zinc. |
| ZF (Zinc-Iron) | Zinc with iron alloy | Enhanced hardness and wear resistance. |
| ZM (Zinc-Magnesium) | Zn with 2–4% Mg, 5–13% Al | Superior corrosion resistance in harsh environments. |
| AZ (Aluminium-Zinc) | 55% Al, 43.5% Zn, 1.5% Si | Excellent corrosion resistance and heat reflectivity. |
| AM (Aluminium-Magnesium) | Al with Mg alloy | High corrosion resistance; suitable for high-temperature applications. |
3. SECC vs SGCC Steel — What’s the Difference?
| Property | SECC Steel Grade | SGCC Steel Grade |
|---|---|---|
| Yield Strength | 140–280 MPa | 120–220 MPa |
| Tensile Strength | 270–410 MPa | 240–360 MPa |
| Elongation (80 mm) | ≥28% | ≥32% |
| Bendability | 180° with 6t mandrel | 180° with 6t mandrel |
SECC Steel FAQ：
SECC Steel is electro-galvanized cold-rolled carbon steel with excellent formability and corrosion resistance. It is widely used in electrical enclosures, appliance panels, automotive components, and light structural applications.
SECC typically contains low carbon (≤0.15–0.20%), with small amounts of silicon, manganese, and trace elements to enhance formability and ensure consistent mechanical properties for manufacturing processes.
SECC Steel is electro-galvanized, providing a smooth, uniform zinc coating ideal for painting and surface finishing, while SGCC is hot-dip galvanized with higher corrosion resistance but a rougher surface.
Yes, SECC Steel offers excellent formability and weldability, making it suitable for bending, stamping, deep drawing, and light assembly welding in manufacturing and industrial applications.
SECC Steel is typically electro-galvanized with zinc or zinc-alloy coatings. These coatings provide corrosion protection, maintain a smooth finish for painting, and enhance durability for indoor and mild outdoor environments.
