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BASIC INFORMATION
JIS G3444 CIRCULAR HOLLOW SECTION
Standard: JIS G3444
Grade: STK400, STK500
Size: 1/2 INCH--15INCH
Wall Thickness: 5MM--50MM
Wall Thickness Tolerance: ±10%
Length: Normally 6M/12M, also depends on the requirements
Advantades: High Strength, Durability, Easy to Fabricate
Application:transportation water,Construction industry,energy industry
CHEMICAL COMPOSITION
| CHEMICAL COMPOSITION OF JIS G3444 | |||||
| GRADE | C | Si | Mn | P | S |
| STK 400 | 0.25%MAX | - | - | 0.04%MAX | 0.04%MAX |
| STK 500 | 0.24%MAX | 0.35%MAX | 0.3-1.3 | 0.04%MAX | 0.04%MAX |
Chemical composition of JIS G3444 ERW PIPE and its significance
1. Carbon (C) :
Carbon is the main element that affects the strength and hardness of steel. In JIS G3444 standard, different grades of steel pipes have different upper limits on carbon content to ensure the strength and weldability of the material.
2. Silicon (Si) :
Silicon is mainly used as a deoxidizer in steel, helping to improve the strength and hardness of steel. The limitation of silicon content in the standard helps to control the mechanical properties of the material.
3.Manganese (Mn) :
Manganese is an important element for improving the strength and hardness of steel, while also helping to eliminate the adverse effects of sulfur.
4. Phosphorus (P) and sulfur (S) :
Phosphorus and sulfur are harmful elements in steel, which reduce the plasticity and toughness of steel.
The specification of these chemical compositions ensures the performance and reliability of JIS G3444 ERW PIPE in a variety of applications. By controlling the content of these elements, it is possible to ensure that the steel pipe meets specific engineering requirements and environmental conditions.
MECHANICAL PROPERTIES OF JIS G3444
| MECHANICAL PROPERTIES OF JIS G3444 | ||||||
| GRADE | Tensile Strength N/mm2 | Yield Point or Proof Stress N/mm2 | Weld Tensile N/mm2 | Flattening Resistance Strength | Bendability | |
| Distance between Flat Plates (H) | Bending Angle, a) | Inside Radius | ||||
| Applicable Outside Diameter | ||||||
| All Outside Diameters | All Outside Diameters | All Outside Diameters | All Outside Diameters | 50 mm or under | ||
| STK 400 | 400min | 235min | 400min | 2/3D | 90° | 6D |
| STK 500 | 500min | 355min | 500min | 7/8D | 90° | 6D |
1. High quality manufacturing:
- JIS G3444 ERW Carbon Steel Pipes are high quality steel pipes manufactured with precision and are suitable for a wide range of industries including construction, infrastructure, mining and transportation.
2. Durability:
- These steel pipes are made of carbon steel material, with wear and corrosion resistance characteristics, suitable for use in harsh environments. The tube walls are reinforced to provide additional strength and durability, allowing it to withstand high pressures and temperatures.
3. Versatility:
- The ERW Pipes are available in a variety of sizes and specifications for different applications, including natural gas piping, water supply, wastewater treatment and chemical treatment. The pipes are also adapted to a variety of manufacturing processes, including machining, welding and bending, making them easy to use in different situations.
4. Manufacturing process:
- Manufactured using the resistance welding (ERW) process, which involves melting the edge of a steel strip using a high-frequency induction heater and then applying pressure to form a continuously welded joint. This process results in high-quality pipes with seamless joints that are stronger and more durable than traditional welded pipes.
5. Security:
- JIS G3444 ERW Carbon Steel Pipes are designed with safety in mind and comply with international safety regulations, ensuring that they are safe in any application. In addition, the pipes are made of advanced materials, reducing the risk of damage and failure.
6. Surface treatment:
- Usually the surface is hot dip galvanized, zinc coating exceeds 210g/㎡, providing long-term corrosion resistance.
7. Application field:
- JIS G3444 ERW Pipes for general structural and low pressure applications such as engineering, construction, pile foundation, construction and other general purpose applications.
1. Civil Engineering and building structure:
- JIS G3444 standard is applicable to carbon steel pipes used in civil engineering and building structures, such as steel towers, scaffolding, foot piles, foundation steel piles, anti-landslide piles and other structures.
2. Bridge engineering:
- Some steel grades of JIS G3444 have good strength and stiffness and are suitable for the construction of bridge components such as beams, piers and abutments.
3. Building construction:
- Suitable for framing systems, roof structures and external walls.
4. Industrial applications:
- General JIS G3444 steel pipes are used for the construction of support structures, conveying systems and equipment frames.
5. Oil and gas exploitation and transportation:
- JIS G3444 ERW PIPE serves many fields and industries such as oil and gas extraction and transmission, shipbuilding and automobile manufacturing, hydropower, environmental protection, mechanical engineering, infrastructure construction, etc
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