SS400 Carbon Steel Plate
High-quality SS400 carbon steel plate offering excellent weldability, strength, and versatility for construction, machinery, and fabrication industries.
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Excellent Weldability: Low carbon content ensures smooth and efficient welding performance.
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Good Strength: Minimum yield strength of 245 MPa provides reliable structural stability.
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Versatile Applications: Suitable for general structural and fabrication purposes.
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Cost-Effective Material: Competitive price with stable mechanical properties.
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Good Surface Quality: Smooth rolled surface suitable for coating and further processing.
SS400 Steel Description
SS400 steel is a mild carbon structural steel defined under the JIS G3101 standard, widely used in construction, machinery, and fabrication industries. It offers a minimum yield strength of 245 MPa and tensile strength between 400–510 MPa, providing an excellent balance between strength, ductility, and workability.
With its excellent weldability and machinability, SS400 is commonly used in bridges, buildings, frames, and steel structures. The material is available in plates, coils, and structural shapes, and can be hot-rolled or pickled & oiled depending on customer requirements.
SS400 Technical Data Sheet
| SS400 Chemical Composition | |||||
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) |
| ≤ 0.17 | ≤ 0.50 | ≤ 1.40 | ≤ 0.035 | ≤ 0.035 | |
| SS400 Mechanical Properties | |
| Property | Minimum Value |
| Yield Strength (ReL) | 245 MPa (thickness ≤16 mm) |
| Tensile Strength (Rm) | 400–510 MPa |
| Elongation (A5) | ≥ 23% |
| Impact Energy | — (Not specified, room temperature tough steel) |
SS400 Applications
SS400 steel plates are widely used in general structural and engineering applications, including:
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Bridges and building structures
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Shipbuilding and heavy machinery
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Steel frames and supports
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Automotive and agricultural equipment
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Fabricated components and industrial platforms
Because of its high versatility, good weldability, and low cost, SS400 remains one of the most popular carbon steel grades for structural and fabrication projects around the world.
