SS400 steel plate is a common type of hot-rolled carbon steel for structures, according to Japanese standards (JIS G 3101). SS means Structural Steel, and 400 means it has at least 400 MPa of tensile strength. People like it because it's easy to shape, welds well, and is pretty strong. So, it's used a lot for general building stuff when you don't need super strong or special metals.
We make our SS400 carbon steel sheet using hot-rolling, so it has consistent properties and a surface that's good for building things. It's a popular option for builders because it combines good performance, easy work, and reasonable price.
Product Details
Specifications & Technical Parameters
| Item | Specification / Typical Data |
| Standard | JIS G 3101 (Equivalent to Chinese GB/T 700 Q235) |
| Thickness Range | 1.5mm ~ 200mm |
| Width Range | 1000mm ~ 2500mm (or as rolled) |
| Length Range | 3000mm ~ 12000mm (or as rolled) |
| Surface Condition | Hot-rolled (HR), with mill scale. Blasted or pickled surface available upon request. |
| Yield Strength | 245 MPa min |
| Tensile Strength | 400 - 510 MPa |
| Elongation | 17% min (for thickness ≤16mm) |
Typical Chemical Composition (Max. %)
| Element | Composition Range |
| Carbon (C) | 0.050 max |
| Manganese (Mn) | N/A (not specified) |
| Phosphorus (P) | 0.050 max |
| Sulfur (S) | 0.050 max |
Features & Advantages
Optimal Cost-Effectiveness
Compared to higher-grade alloy or high-strength steels, SS400 steel plate offers a significantly lower price point. It provides adequate strength for numerous non-critical structural applications, allowing for substantial project cost savings without compromising core integrity.
Excellent Formability and Weldability
This steel can be easily cut, bent, punched, and drilled using standard workshop equipment. Its carbon-equivalent value is relatively low, facilitating straightforward welding with common methods (SMAW, GMAW) without requiring complex pre- or post-weld heat treatments in most cases, which streamlines fabrication.
Proven Reliability for General Structures
As a longstanding standard grade, SS400 has a proven track record in construction. Its predictable and consistent mechanical behavior allows engineers and builders to design with confidence for applications like building frames, support brackets, and base plates.
Applications
Our Services
We understand that off-the-shelf sizes don't always fit project blueprints. To add value, we offer practical processing services:
Precision Cutting
We provide accurate plasma or flame cutting to your specified shapes and dimensions, reducing on-site waste and preparation time.
Custom Packaging
We ensure safe transit by tailoring packaging-using protective coatings, wooden crates, or steel strapping-based on your shipping method and destination.
Shot Blasting & Priming
To save you a production step, we can prepare the SS400 carbon steel sheet by removing mill scale via shot blasting and applying a standard shop primer for immediate fabrication and improved paint adhesion.
Our Strength
Our capability in supplying materials like SS400 plates is built on tangible strengths:
- Stable Supply Chain Access: We maintain strong partnerships with major mills, enabling us to source a wide range of thicknesses and sizes reliably, even for larger volume orders.
- Practical Quality Assurance: We perform essential checks like dimensional verification and visual inspection, and ensure full traceability with genuine Mill Test Certificates for every batch.
- Logistics Coordination Expertise: We have extensive experience in handling the paperwork and coordination for inland and international freight, ensuring your material arrives as scheduled.
FAQ
Q: What's the big deal between SS400 and ASTM A36 steel plate?
A: They're pretty much the same and can usually be swapped. SS400 is a JIS thing with a tensile range (400-510 MPa), and ASTM A36 has a minimum yield strength of 250 MPa. The chemicals are a bit different, but they're both just your regular structural carbon steels.
Q: Can you galvanize SS400 plates?
A: Yep, SS400 is good for galvanizing because of its surface and what it's made of. We can get that done for you with our partners if you need it.
Q: Do you give out material certificates?
A: Sure thing. You'll get a Mill Test Certificate (MTC) with each order that fits EN 10204 3.1. It has the real chemical stuff and test results for the plates.
Q: How long does it usually take?
A: If we have the size you need, we can ship in about a week or two. If it's a weird size or a big order, we'll give you a solid time frame when you confirm. It's usually around 3 to 5 weeks.
Q: Can I leave SS400 outside without paint?
A: Like most steels, SS400 will rust if it gets wet. If you're using it outside, you gotta prep it and coat it with paint or galvanize it to make it last.
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