In modern construction and structural engineering, selecting the right steel channel is not just about dimensions-it is about ensuring the correct balance between strength, weldability, cost efficiency, and long-term structural safety.
JIS G 3101 SS400 channel steel
At GNEE Steel, we specialize in JIS G 3101 SS400 channel steel and SS540 structural channel steel, providing global buyers with reliable solutions for building frames, infrastructure, and heavy-duty applications.
If you are unsure which grade to choose, this guide will help you make a clear engineering-based decision.
Key Features & Benefits of SS400 Channel Steel
Certified Quality – JIS Standard Assurance
Trust in the proven strength and stable performance of our SS400 channel steel, manufactured strictly under JIS G 3101 standards. It delivers excellent weldability, forming ability, and impact resistance, ensuring a solid foundation for structural safety in construction projects.
High Strength & Reliable Durability
Build with confidence using SS400 steel channels, featuring approximately 400 MPa tensile strength. This level of performance ensures stable load-bearing capacity for general structural applications such as frames, supports, and industrial buildings.
Wide Applicability Across Industries
From industrial steel frames to mechanical structures, SS400 channel steel offers outstanding versatility. It is widely used in construction, machinery, warehouse systems, and general fabrication projects where balanced performance is required.
Available Surface Conditions
We provide flexible surface options for SS400 channels, including:
- Black steel (raw finish)
- Hot-dip galvanized finish
This ensures suitability for both indoor structural systems and outdoor corrosion-prone environments.
Global Sourcing & Supply Capability
As a professional supplier of JIS G 3101 SS400 steel channels, we simplify global procurement by providing stable supply, export packaging, and compliance with international project requirements.
Key Differences of SS400 vs SS540
| Property | SS400 | SS540 |
|---|---|---|
| Core Definition | General structural rolled steel | High-strength rolled steel for welded structures |
| Strength Grade | Medium strength | High strength |
| Tensile Strength | 400–510 MPa | ≥540 MPa |
| Yield Strength | ≥245 MPa | ≥400 MPa |
| Chemical Composition | Wider tolerance range | Strictly controlled composition |
| Weldability | Good | Excellent |
| Main Application | General construction and framing | Heavy-load, critical structural systems |
Choosing the JIS Channel Steel SS400 or SS540?
Many customers ask: "Which steel channel should I choose for my project?"
The answer depends on structural load requirements, welding complexity, and cost optimization.
Choose SS400 Channel Steel if:
If your project requires cost efficiency, general structural performance, and easy fabrication, SS400 is the ideal choice.
As the most widely used grade under JIS G 3101 channel steel standards, SS400 provides stable mechanical properties and excellent weldability, making it suitable for:
Building frames
General construction structures
Machinery components
Warehouse steel systems
It is the most cost-effective steel channel solution for standard engineering applications.
Choose SS540 Channel Steel if:
If your project involves high load demand, structural safety-critical components, or weight reduction requirements, SS540 is the better choice.
SS540 channel steel provides:
Higher yield strength
Improved structural safety margin
Better performance in welded structures
Enhanced reliability in demanding environments
It is ideal for heavy-duty engineering applications and critical structural parts.
SS400 Channel Steel Dimensions & Specifications
We supply a full range of SS400 steel channel sizes, suitable for different structural requirements:
(dimension table retained as-is for technical reference)
SS400 Channel Steel Size Chart
| Dimensions (mm) | Unit Weight (kg/m) | Dimensions (mm) | Unit Weight (kg/m) |
|---|---|---|---|
| 50×25×(3.0–5.0)×6.0 | 2.37–3.46 | 125×65×5.5×8.0 | 12.91 |
| 75×40×3.8×7.0 | 5.3 | 125×65×6.0×8.0 | 13.4 |
| 75×40×4.0×7.0 | 5.6 | 150×75×5.5×7.3 | 14.66 |
| 75×40×4.5×7.0 | 5.85 | 150×75×5.7×10.0 | 16.71 |
| 75×40×5.0×7.0 | 6.92 | 150×75×6.0×10.0 | 17.9 |
| 100×50×3.8×6.0 | 7.3 | 150×75×6.5×10.0 | 18.6 |
| 100×50×4.2×6.0 | 8.03 | 150×75×9×12.5 | 24 |
| 100×50×4.5×7.5 | 8.97 | 200×80×7.5×11.0 | 24.6 |
| 100×50×5.0×7.5 | 9.36 | 200×90×8.0×13.5 | 30.3 |
| 125×65×5.2×6.8 | 11.66 | 250×90×9.0×13.0 | 34.6 |
| 125×65×5.3×6.8 | 12.17 | 300×90×9.0×13.0 | 38.1 |
Applications of SS400 Channel Steel
SS400 and SS540 steel channels are widely used in:
Industrial and commercial building frames
Heavy machinery fabrication
Bridge and infrastructure construction
Warehouse racking and storage systems
Shipbuilding and transport vehicle structures
Procurement Support
Not sure whether SS400 or SS540 channel steel meets your project requirements?
We provide:
- Free technical consultation
- Material comparison support
- Sample testing kits upon request
Packaging & Delivery
- Standard export packaging with steel straps
- Anti-corrosion protection during transit
- Delivery time: 15–20 days after order confirmation
- Loading ports: Shanghai / Ningbo / major China ports
Certifications & Quality Assurance
We are a certified manufacturer with:
- ISO 9001 Quality Management System
- ISO 50001 Energy Management System
- CE Certification for structural steel
- CPR Certification for construction products
- CIDB Malaysia Certification
All SS400 and SS540 channel steel products are suitable for global engineering projects.
Our advanced production and logistics system ensures:
- Precision rolling and cutting
- Stable large-volume supply
- In-house R&D and quality control
- Efficient global shipping coordination
From production to port delivery, we guarantee consistent quality for every steel channel order.
At GNEE Steel, we provide high-quality JIS channel steel solutions with stable global supply, strict quality control, and full technical support.
Whether you need SS400 for cost-efficient construction or SS540 for high-strength applications, we can help you select the right solution. Contact us today to get a fast quotation and technical recommendation.
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What is SS400 grade steel?
The SS400 material is a distinguished grade of structural steel. It is a crucial component in various engineering and construction projects due to its superior strength-to-weight ratio and high corrosion resistance.
Is SS400 equivalent to mild steel?
SS400 steel plate is a type of mild carbon steel. The name itself tells you exactly what the material is designed to do. The "SS" stands for Structural Steel, and the "400" refers to its minimum tensile strength of 400 Megapascals (MPa).
Is SS400 low carbon steel?
Additionally, due to its low carbon content, SS400 cannot undergo heat treatment, preventing the attainment of surface hardness through such processes. Furthermore, as it is susceptible to rust, it requires protection through plating, painting, or black oxide (oxidation film).
Is A36 equivalent to SS400?
The ASTM standard A36 steel and the JIS standard SS400 steel chemical composition are also much the same. JIS SS400 steel is ASTM A36 equivalent material. Both ASTM A36 SS400 steel are designed for structural purposes. In common application cases, ASTM A36 SS400 mechanical property can achieve the same purpose.