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JIS G3466 STKR490 hollow section is a type of steel pipe that is commonly used in construction and structural applications. This hollow section is made from high-quality steel ,known for its strength, durability.Due to its higher strength, its typically used in applications that require greater load-bearing capabilities. Here are some detailed information about STKR490 hollow sections:
1. Size Range:
The outside diameter from 50mm×50mm to 1200mm×1200mm, with wall thicknesses from 1.3mm to 50mm, and lengths commonly used 5.8m,6m,12m.
2.Chemical Composition:
Carbon (C) ≤ 0.18%,
Silicon (Si) ≤ 0.55%,
Manganese (Mn) ≤ 1.5%,
Phosphorus (P) ≤ 0.04%,
Sulfur (S) ≤ 0.04%.
3. Mechanical Properties:
The tensile strength ≥ 490 MPa,
The yield point or proof stress ≥ 325 MPa,
Elongation≥ 23%.
| STKR490 | STKR400 | ||
| Chemical Composition | Carbon (C) | ≤0.18% | ≤0.25% |
| Silicon (Si) | ≤0.55% | no specify the maximum content of these elements | |
| Manganese (Mn) | ≤1.5% | no specify the maximum content of these elements | |
| Phosphorus (P) | ≤ 0.04% | ≤ 0.04% | |
| Sulfur (S) | ≤ 0.04% | ≤ 0.04% | |
| Mechanical Properties | Tensile Strength | ≥490 MPa | ≥400 MPa |
| Yield Point or Proof Stress | ≥325 MPa | ≥245 MPa | |
| Elongation | ≥23% | ≥23% | |
STKR490, with its higher strength, is often used in applications requiring greater load-bearing capabilities, such as in high-rise building structures, bridges, and heavy machinery.
STKR400 is more commonly used in general construction structures where high strength is not as critical.
These differences in mechanical properties and chemical composition make STKR490 and STKR400 suitable for different types of structural applications, with STKR490 being more appropriate for more demanding engineering applications due to its higher strength and better weldability.
Here are some of the key applications:
1. Construction Structure: STKR490 hollow sections are used in the construction of various types of buildings, including both mid-to-low rise buildings and high-rise buildings. They are utilized as beams, columns, and column-beam structures, as well as for floors and roofs.
2. Machinery Making: These hollow sections are employed in the manufacturing of industrial machinery, taking advantage of their high strength and durability.
3. Containers: STKR490 hollow sections are used in the construction of containers, benefiting from their resistance to deformation and corrosion.
4. Hall Structures: They are also used in the construction of large hall structures, providing support and stability.
5. Offshore Oil Fields: STKR490 hollow sections are applied in offshore oil field structures, where high strength and resistance to harsh environments are necessary.
6. Sea Trestle: These hollow sections are used in the construction of sea trestles or jetties, which require materials that can withstand the rigors of marine environments.
7. Motorcar Chassis: STKR490 steel is used in the manufacturing of motorcar chassis due to its high strength and safety characteristics.
8. Airport Structures: The steel is also utilized in airport structures, where the need for robust and reliable materials is critical.
9. Shipbuilding: STKR490 hollow sections are used in shipbuilding for various structural components that require high strength and resistance to maritime conditions.
10. Automobile Axle Pipe: This steel grade is used in the production of automobile axle pipes, where high strength and durability are essential.
These applications highlight the versatility and importance of STKR490 hollow section steel in providing structural support and durability across a range of industries.
Here are some common surface treatments for STKR490 hollow sections:
1. Powder coating: It provides a smooth and durable finish, offering excellent resistance to corrosion, abrasion, and fading.
2. Hot-dip galvanized: This process involves coating the steel with a layer of zinc, which offers excellent protection against rust and corrosion.
3.Primer painted: Applying a primer coat can provide a base for additional paint layers and improve the steel's resistance to corrosion, especially when used in outdoor or drippy environments.
These surface treatments help to extend the service life of STKR490 hollow section steel and ensure that it performs well in various applications. This product can offer excellent performance and durability for a wide range of construction and structural applications.
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