Tianjin Lefin Industrial Co., Ltd is one of the most experienced manufacturers and suppliers of ss400 steel pipe in China. Please feel free to buy high quality ss400 steel pipe from our factory. Good service and reasonable price are available.
Brief description
JIS G3101 SS400 is a widely used carbon structural steel grade in Japan. It is known for its excellent mechanical properties and versatility, making it suitable for various structural applications. The "SS" in SS400 stands for "structural steel," while "400" indicates that its tensile strength is at least 400 MPa.
Basic Information
SS400 STEEL PIPE
Type: Plate/sheet, Strip in coil, Section, Flat and Bar,
Circular Hollow Section(CHS) ,Rectangular Hollow Section(RHS), Square Hollow Section(SHS)
Standard: JIS G3101
Outside Diameter:
1/2 INCH - 24 INCH(CHS)
20MM × 20MM - 1200MM × 1200MM(SHS)
20MM × 30MM - 1000MM × 1500MM(RHS)
Wall Thickness:
1.3MM - 22MM(CHS)
1.3MM - 50MM(SHS,RHS)
Length: Commonly used 5.8M, 6M, 12M, but we can also produces depends on client's requirement.
Common Process:
ERW: 20MM - 660MM (OD) Wall Thickness: 1.3MM - 50MM
SSAW: 219MM - 4084MM (OD) Wall Thickness: 7.75MM - 25.4MM
Coating: Black paint, Varnish, Anti-rust oil.
Applications: Construction, Mechanical Engineering, Shipbuilding, Automotive Industry.
Chemical Composition
| Composition, max, % | |
| SS400 | |
| Carbon (C) | - |
| Manganese (Mn) | - |
| Phosphorus (P) | 0.05 |
| Sulfur (S) | 0.05 |
Elements in the table with no limit values or elements not given in the table may be added as necessary.
Mechanical properties
| Mechanical properties | |||||||||||
| Symbol of grade |
Yield point or proof strength N/mm² |
Tensile strength N/mm² |
Elongation | Bendability | |||||||
| Thickness a) mm |
Thickness a) mm |
Test piece |
% | Bending angle |
Inner radius |
Test piecec) |
|||||
| ≤16 | >16 ≤40 |
>40 ≤100 |
>100 | ||||||||
| SS400 | >245 | >235 | >215 | >205 | 400 to 510 |
≤5 in thickness of plates/sheets,strips in coil,flats and sections |
No.5 | ≥21 | 180° | 1.5x thickness |
No.1 |
| >5≤16 in thickness of plates/sheets,strips in coil,flats and sections |
No.1A | ≥17 | |||||||||
| >16≤50 in thickness of plates/sheets,strips in coil,flats and sections |
No.1A | ≥21 | |||||||||
| >40 in thickness of plates/sheets,flats and sections |
No.4 | ≥23b) | |||||||||
| ≤25 in diameter or distance across flats of bars |
No.2 | ≥20 | 180° | 1.5x diameter or distance across flats |
No.2 | ||||||
| >25 indiameter or distance across flats of bars |
No.14A | ≥22 | |||||||||
| NOTE 1N/mm²=1MPa Note a) Thickness shall be:thickness at the location of test piece for section;diameter for round bars;anddistance across flats for square and hexagonal bars. Note b) For the elongation of No.4 test piece of steel plate/sheet of thickness over 90 mm,subtract 1 from thevalues of this table for each increment of 25mm or its fraction in thickness.The number subtracted shall not exceed 3 Note c) For the bend test of steel products of thickness 5mm or under,No.3 test piece may be used. |
|||||||||||
These properties make SS400 suitable for applications requiring moderate strength and good ductility, such as structural components and welded structures.
production process
Primary Smelting: Iron ore is smelted to produce molten steel.
Refining: The molten steel is refined using processes like LF (Ladle Furnace) and VD (Vacuum Degassing) to achieve the desired chemical composition.
Continuous Casting: The refined steel is cast into slabs or billets through continuous casting or ingot casting.
Hot Rolling: The cast slabs are heated and then rolled into the desired shapes and sizes, such as plates, beams, and bars.
Heat Treatment: The rolled products may undergo heat treatment to enhance their mechanical properties.
Inspection and Testing: The final products are inspected and tested for mechanical properties, surface quality, and dimensions.
Cutting and Finishing: Depending on the application, the steel products may be cut into specific sizes using methods like plasma cutting or flame cutting.
Advantages and Applications
Advantages
- Good Mechanical Properties: It has a tensile strength of 400-510 MPa and a minimum yield strength of 205-245 MPa, depending on the thickness.
- Excellent Weldability: The low carbon content makes it easy to weld, which is crucial for structural applications.
- Cost-Effective: SS400 is relatively inexpensive, making it suitable for large-scale applications.
- Versatility: It can be easily formed, bent, and machined, allowing for a wide range of applications.
Applications
- Construction: For building frames, bridges, high-voltage transmission towers, and other structural components.
- Mechanical Engineering: Used in manufacturing parts that require bending, forming, or welding.
- Automotive and Shipbuilding: Suitable for manufacturing vehicle frames, ship structures, and other components.
- General Engineering: Used for making steel bars, beams, and other structural elements.
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