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+91-9820944724
Home > Our Products > Structural Steel Plates > Grade / Standard> JIS G3101 SS400
Hindustan Steel Corporation is a trusted supplier of JIS G3101 SS400 structural steel plates, engineered to meet general structural requirements with reliable performance and cost efficiency. SS400 is a popular mild steel grade from Japan, known for its weldability, ductility, and moderate tensile strength — making it a go-to choice for construction, fabrication, machinery components, and civil engineering works.
Whether you need SS400 plates for industrial buildings, automotive frames, or machinery structures, we stock a wide range of JIS G3101 SS400 thicknesses and dimensions with full mill test certification and third-party inspection options.
SS400 steel, as specified under the JIS G3101 standard, is a carbon-manganese structural steel plate grade used extensively in Japan and other global markets. The “SS” stands for structural steel, and 400 refers to the minimum tensile strength (400 MPa). It is comparable to ASTM A36, EN S235JR, and IS 2062 E250 in properties, and is widely preferred due to its good formability, machinability, and weld performance.
JIS G3101 standard ensures dimensional stability, mechanical reliability, and consistent chemical composition, making SS400 ideal for both static and dynamic load-bearing components.
SS400 is one of the most versatile structural steel plates used across sectors including:
Due to its excellent machinability, moderate tensile properties, and low carbon content, SS400 is suitable for bending, welding, and cutting — enabling fast fabrication and consistent structural performance.
The mechanical strength of JIS G3101 SS400 plates ensures reliable structural support in low-to-medium stress environments. These are the indicative mechanical properties as per JIS G3101 standard:
| Property | Value |
|---|---|
| Yield Strength (MPa) | Min. 245 MPa (t ≤ 16mm) |
| Tensile Strength (MPa) | 400–510 MPa |
| Elongation (%) | Min. 21% (thickness dependent) |
| Impact Resistance | Notch test optional (at buyer’s request) |
| Hardness (Brinell approx.) | 125–160 HB (untreated) |
Note: Strength values may vary slightly with thickness. Mill test reports available upon request.
Here is the typical chemical composition of SS400 structural steel plate as per JIS G3101:
| Element | Percentage (Max) |
|---|---|
| Carbon (C) | 0.17–0.21 |
| Manganese (Mn) | 0.50–1.60 |
| Phosphorus (P) | ≤ 0.050 |
| Sulfur (S) | ≤ 0.050 |
| Silicon (Si) | ≤ 0.30 (typical) |
This low-carbon composition ensures:
We also provide third-party lab test certificates and chemical composition sheets upon request for critical applications.
SS400 is often compared with other mild structural steel grades across international standards. Here’s a quick equivalence table:
| Standard | Equivalent Grade |
|---|---|
| JIS G3101 | SS400 |
| ASTM | A36 |
| EN | S235JR / S275JR |
| IS | IS 2062 E250 (Gr A/B) |
| DIN | St37-2 / St44-3 |
| GB (China) | Q235A / Q235B |
While SS400 and A36 are often considered similar, SS400 has tighter chemical restrictions and slightly better elongation, making it suitable for projects demanding reliable forming and welding performance.
We supply SS400 plates in a wide range of thicknesses and custom-cut sizes to match fabrication needs:
We also stock SS400 sheets, coils, checker plates, and HR plates for civil and industrial use.
All materials are available in:
Thanks to its low carbon content and uniform grain structure, SS400 exhibits excellent performance in fabrication operations:
We also support customer-specified fabrication work, including hole punching, CNC shaping, and bending services for OEM parts.
When buyers compare SS400 vs A36 or SS400 vs S235JR, here’s how to decide:
At Hindustan Steel Corporation, we help buyers choose the best equivalent or exact-match steel plate based on usage, budget, and fabrication needs — and supply with full documentation.
We’re a leading SS400 plate supplier in India with a buyer-first approach. Here’s what makes us a trusted partner:
We understand fabrication challenges and ensure our plates arrive ready for use, helping reduce waste, machining costs, and delays.
Hindustan Steel Corporation exports JIS G3101 SS400 plates to over 45 countries across Asia, Africa, the Middle East, and Europe. Our plates are compliant with Japanese Industrial Standards (JIS) and meet strict shipping and documentation norms.
Export Destinations Include:
We offer:
Whether you’re an EPC contractor, stockist, or OEM — our team ensures timely, compliant, and cost-effective supply.
Before placing your order, consider these points:
Our engineers help assess end-use suitability and machining compatibility, so you get the right material with zero surprises.
Every SS400 plate from Hindustan Steel Corporation is backed with:
We also provide chemical and mechanical test reports, raw material origin, and packing lists with HS codes for smooth customs clearance.
Yes, SS400 is very close to A36 in mechanical and chemical properties but follows Japanese norms.
SS400 contains approx. 0.17–0.21% carbon, 0.5–1.6% manganese, and ≤0.05% P/S.
The tensile strength ranges between 400–510 MPa, with yield strength ~245 MPa.
Yes, it has excellent weldability without preheating due to low carbon content.
Typically ranges around 125–160 HB (Brinell), depending on thickness.
From 3mm to 150mm, with widths up to 2500mm and custom lengths.
Yes, but it is not corrosion-resistant, so painting or galvanizing is recommended.
IS 2062 E250 Grade A or B is the closest Indian equivalent.
Yes, it is mostly supplied as hot rolled steel plate (HR), black surface.
Yes, we offer shot-blasted and primer-coated plates on request.
Absolutely. CNC, oxyfuel, plasma, and laser cutting services available.
Yes. We export to UAE, Vietnam, South Africa, Europe, and more.
Mill test certificate, chemical/mechanical test report, packing list, and invoice.
Simply call us, fill out the quote form, or drop us an email — we’ll respond same day.
Ready to Order? Request a Quote Now
Need SS400 plates for your next structural project or export requirement?
Get an instant quote from Hindustan Steel Corporation. We provide:
Call Us, Drop a Mail, or click “Request a Quote” now to get started with your SS400 steel requirement.
+91-22-66159018
+91-9820944724
sales@hindustansteel.com hindustansteel1@gmail.com
390/392, Ground Floor, Shankar Mansion, S.V.P. Road, Mumbai – 400004, India
DSQ Plates are used for tank building, acid/chemical storage, ducting, and electroplating lines. Their low carbon, high ductility, and anti-crack profile make them perfect for processes involving heavy forming and corrosive environments. Browse our application tabs to choose DSQ by use-case.
We supply DSQ plates in grades that comply with IS 2062, ASTM A283, and industry-specific dead soft steel specs. From thin sheets to thick, press-ready plates—get the right grade with correct mechanicals and test reports.
DSQ (Dead Soft Quality) Steel Plates may not have a globally unified standard like structural steels, but they comply with select Indian and international specifications that focus on soft, formable, and acid-resistant applications.
At Hindustan Steel Corporation, we have built a trusted name in supplying DSQ (Dead Soft Quality) Steel Plates to both domestic and international buyers involved in galvanizing, pickling, electroplating, and tank fabrication industries.
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We’ve Comparison including: what is DSQ plate, where to use it, what is its thickness range, and how it compares with standard steel.
Not sure whether to choose DSQ over IS 2062 or High Tensile? Read our DSQ blogs for real use-cases in galvanizing, chemical plants, and pickling units. Know the difference before placing bulk orders.
We understand that engineering, procurement, and QA teams need technical clarity before placing an order.
+91-22-66159018
+91-9820944724
sales@hindustansteel.com hindustansteel1@gmail.com