What is SECC-EG? Distinguish SECC, SECD, SECE in Electro-Galvanised Steel
What is SECC in the steel sheet and steel industry?
SECC is the designation for electro-galvanised steel (Electro Galvanized Steel) according to Japanese JIS standards. This is a type of cold-rolled steel galvanised by electrolysis, with a smooth surface, uniform coating, and often a characteristic EG color.
In the mechanical engineering and equipment manufacturing industry, SECC is also known as EG steel sheet or electro-galvanised steel sheet, widely used in electrical cabinets, cable trays, machine casings, and components requiring high precision.
Meaning of SECC-EG designation
The SECC-EG designation is usually understood as electro-galvanised steel (Electro Galvanized) with a galvanised coating created by electrolysis.
- S = Steel
- E = Electrolytic
- C = Cold rolled
- C = Commercial quality
EG stands for Electro Galvanized, which means electro-galvanised.
Comparison of SECC – SECD – SECE in electro-galvanised steel
In JIS standards, electro-galvanised steel (Electro Galvanized Steel) is classified into different grades based on ductility, formability, and intended use. The three most common types are SECC, SECD, and SECE. Selecting the correct material grade is crucial in mechanical fabrication, especially for components requiring bending, stamping, or deep drawing.
Differences in mechanical properties and fabrication capability
The difference between SECC, SECD, and SECE primarily lies in the ductility of the cold-rolled steel base before electro-galvanising. Higher ductility results in better formability but reduced hardness.
| Material type | Mechanical properties | Formability | Common applications | Usage level |
|---|---|---|---|---|
| SECC | Medium, stable hardness | Basic forming | Electrical cabinets, cable trays, machine casings | Most common |
| SECD | More ductile than SECC | Deeper forming | Stamping components, precision mechanics | Less than SECC |
| SECE | High ductility | Complex forming | Deep drawn components, repeatedly formed products | Least used |
Technical analysis of each type
SECC – the most commonly used electro-galvanised steel type
SECC is the most common material grade in the electro-galvanised steel group according to JIS standards, widely used in mechanical fabrication, manufacturing of electrical cabinets, cable trays, machine casings, and industrial equipment. This is a type of cold-rolled steel galvanised by electrolysis, with a thin, uniform coating and a very smooth surface.
An important characteristic of SECC is the balance between hardness and ductility. The material has sufficient strength to retain its shape after fabrication, yet is ductile enough for bending, stamping, or forming in common mechanical applications. This makes SECC suitable for mass production and components that do not require excessively deep forming.
SECC material structure
SECC is composed of three main layers:
- High-precision cold-rolled steel base
- Uniform electro-galvanised coating on the surface
- Anti-rust chromate layer creating a characteristic EG color
The electro-galvanised coating has a small but very uniform thickness, giving the material a flat surface, minimal errors, and easy post-fabrication surface treatment. This is a major advantage compared to hot-dip galvanised steel sheet, which has a thick but uneven coating.
Technical advantages of SECC in mechanical fabrication
- High precision due to the use of cold-rolled steel as a base
- Smooth surface, easy for electrostatic painting
- Strongly adhering coating, less peeling during bending and stamping
- Easy to cut, bend, stamp, shape
- Suitable for mass production
- Good rust resistance in indoor environments
Thanks to these characteristics, SECC is widely used in industries requiring stable and easily fabricated materials, especially in sheet metal mechanics.
Practical applications of SECC
In practice, most EG steel sheet products on the market are SECC, as this type meets both technical requirements and cost-effectiveness well.
- Electrical cabinet manufacturing
- Cable tray fabrication
- Industrial machine casings
- Mechanical stamping components
- Electrical – electronic equipment
- CNC and sheet metal fabrication
For products requiring high flatness, a good surface, and easy electrostatic painting, SECC is often preferred over hot-dip galvanised steel sheet.
Why SECC is used more than SECD and SECE
Although SECD and SECE have higher ductility, most common mechanical applications do not require deep forming capabilities. SECC has a reasonable cost, is easy to fabricate, and meets most technical requirements, making it the most widely used in practice.
Therefore, when referring to electro-galvanised steel sheet or EG steel sheet on the market, most are SECC.
SECD – used when higher ductility is required
SECD has higher ductility than SECC, allowing for deeper stamping without cracking the coating. This type is often used in components with large bending angles or requiring multiple forming operations.
However, SECD's higher cost means it is less used in common products.
SECE – used for deep forming
SECE is the material grade with the highest ductility, suitable for components requiring deep drawing or complex forming. In the sheet metal industry, this type is only used when technical requirements are high due to its high cost and it is not necessary for common products.
Why SECC is most used in mechanics and electrical cabinets
- Sufficient ductility for common bending and stamping
- Good surface, easy for electrostatic painting
- Reasonable cost
- Easy for mass fabrication
- Uniform coating, less peeling
Therefore, in the EG steel sheet industry, SECC is the most widely used type, especially in the manufacturing of electrical cabinets, cable trays, machine casings, and industrial equipment.
Why SECC steel is widely used in mechanics
- Smooth surface, easy for electrostatic painting
- High accuracy
- Easy to bend and stamp
- Uniform coating
- Good rust resistance in indoor environments
Thanks to these advantages, SECC is widely used in the production of electrical cabinets, cable trays, industrial equipment, and mechanical fabrication.
VIEW ELECTRO-GALVANISED STEEL SHEET PRODUCT DETAILS NOW:
Phu Cuong Steel Sheet – Large Width Electro-Galvanised Steel Sheet Supplier
Phu Cuong Steel Sheet specializes in supplying green electro-galvanised steel sheet, EG steel sheet, galvanised steel sheet, and steel plate with various specifications, especially available in large widths of 1000mm, 1250mm, and 1500mm.
- Large widths available
- Cut to specification
- Coil slitting – cutting – bending – stamping
- Fast delivery
- Correct thickness
- With CO CQ
Address: 2177C – 2177D National Highway 1A, Dong Hung Thuan, District 12
Phone: 0933 919 899
Website: tonthepphucuong.com
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