SS400 is a material grade defined in the JIS G 3101 standard. The designation "SS400" stands for "Steel Structure" with "400" indicating a lower limit tensile strength of 400 MPa. This ordinary structural steel is the most widely used in the JIS standard, with applications in bridges, ships, vehicles, and more. It is available in forms such as steel plates, bars, and sections, and is used extensively for various auxiliary materials in machinery and structures.
Due to its low carbon content, SS400 has a relatively soft hardness, making it unsuitable for main components requiring high strength, wear resistance, or hardness. However, it boasts excellent weldability and machinability, making it ideal for welding structural parts, nuts, small components, and parts in the automotive and motor industries.
International Comparison of Materials
| EU EN | Inter ISO | USA AISI | Japan JIS | Germany DIN | China GB | France AFNOR | England BS | Canada HG | European EN |
|---|---|---|---|---|---|---|---|---|---|
| S275JR | E275B | A283D A529 Gr.D | SS400 | RSt42-2 St44-2 | Q235 | E28-2 | 161-430 161-43A 161-43B | 260W 260WT | Fe430B |
| Italy UNI | Spain UNE | Sweden SS | Poland PN | Finland SFS | Austria ONORM | Russia GOST | Norway NS | Portugal NP | India IS |
|---|---|---|---|---|---|---|---|---|---|
| Fe430B | AE255B | 1411 1412 | St4V | Fe44B | St42F St430B | St4ps St4sp | NS12142 | FE430-B | IS2062 |
Chemical Composition(JIS G4051)
| P(%) | S(%) | Thick (mm) | Yield stress (Mpa) | Tensile stress (Mpa)% | Elongation (%) |
|---|---|---|---|---|---|
| 0≦0.05 | 0≦0.05 | ≦16 | ≧245 | 400-510 | ≧21 |
SS400 is a widely utilized hot-rolled general structural steel. As defined by the JIS3101 standard, SS400 steel plate is categorized as carbon and low alloy steel. Primarily, SS400 steel plates are used in the construction of containers capable of withstanding low-temperature sea water.
We offer SS400 steel plates in stock, and they can be precisely cut to meet your specific fabrication and design requirements. All our processes adhere to independently accredited and regularly audited quality systems. Our SS400 steel plates are sourced from the highest quality manufacturers globally, each vetted and assessed by our procurement team.
SS400 steel plate sheets are used for general structural purposes in applications such as shipbuilding, housing, and bridge construction. This type of steel plate boasts characteristics like excellent heat resistance, freezing tolerance, uniform structure under pressure, and robust mechanical properties.
This specification for SS400 steel plate includes carbon structural steel shapes, plates, and bars suitable for riveted, bolted, or welded construction of bridges and buildings, as well as for general structural purposes. Heat analysis determines the required chemical composition for elements such as carbon, manganese, phosphorus, sulfur, silicon, and copper. The tensile strength, yield strength, and elongation are evaluated through tension tests to ensure conformity with the required properties. SS400 is a Japanese standard steel with the material designation 1.0037.
