SS400 carbon steel plate offers excellent weldability, machinability, and formability, making it an ideal choice for manufacturing steel structures, bridges, machinery, and industrial frameworks. Due to its similar mechanical properties and outstanding versatility under low-stress and moderate-load environments, it is often compared to ASTM A36 or EN S235JR.
The key difference lies in their specified mechanical properties: ASTM A36 requires a minimum yield strength of 36 ksi (250 MPa) and a tensile strength range of 58–79.8 ksi (400–550 MPa), whereas SS400 derives its name from a tensile strength of 400–510 MPa (58–74 ksi) and a yield strength of 245 MPa (35.5 ksi).
JIS G3101 SS400 Carbon Steel Plate
| Specification | Details |
|---|---|
| Standard | JIS G3101 |
| Grade | SS400 |
| Type | Hot Rolled Carbon Steel Plate |
| Thickness Range | 2 mm – 200 mm |
| Width | 1000 mm – 3000 mm |
| Length | 2000 mm – 12000 mm or customized |
| Tolerance | As per JIS G3193 or customer requirement |
| Surface Finish | Hot rolled, black, pickled, or oiled |
| Delivery Condition | As rolled, normalized, or annealed |
| Equivalent Grades | ASTM A36 (USA), EN S235JR (Europe), GB Q235B (China) |
| Applications | Construction, bridges, shipbuilding, heavy equipment, and machinery parts |
Chemical Composition of SS400 Steel
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.23 |
| Silicon (Si) | ≤ 0.50 |
| Manganese (Mn) | ≤ 1.60 |
| Phosphorus (P) | ≤ 0.050 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 400 – 510 |
| Yield Strength (MPa) | ≥ 245 |
| Elongation (%) | ≥ 23 (for thickness ≤ 16mm) |
| Hardness (HBW) | ≤ 160 |
| Modulus of Elasticity (GPa) | 200 |
| Density (g/cm³) | 7.85 |
Why choose Gnee as your SS400 carbon steel plate supplier?
We have over 18 years of global experience exporting structural and carbon steel, offering factory-direct pricing and rigorous quality control certified by ISO, SGS, and BV. We maintain a large inventory of SS400, A36, and S235JR steel plates and offer comprehensive fabrication services including cutting, drilling, bending, and CNC machining. We offer flexible customization of sizes, thicknesses, and finishes, and ship worldwide with fast delivery within 7-15 days.
Packaging and Delivery
| Item | Details |
|---|---|
| Package | Standard export seaworthy package with waterproof paper, edge protection, and wooden pallets or boxes. |
| Loading Port | Tianjin, Qingdao, or Shanghai Port, China. |
| Container Capacity | 1 × 20ft container: Max. 25 Tons, Max. length 5.8m 1 × 40ft container: Max. 25 Tons, Max. length 11.8m |
| Marking | Each plate labeled with grade, size, heat number, and manufacturer's logo. |
| Delivery Time | 7–15 working days after receiving advance payment or based on order quantity. |