Introduction JIS G 3444 specifies carbon steel tubes for general structural purposes. These tubes are widely used in construction, civil engineering, infrastructure, and industrial structures where mechanical strength, durability, and structural reliability are required. The standard covers different grades of carbon steel tubes designed to meet varying strength requirements. These tubes are suitable for structural fabrication, frameworks, support structures, and other engineering applications. Ladhani Metal Corporation is a manufacturer, supplier, and exporter of carbon steel products, including carbon steel tubes for structural and industrial applications. Products can be sourced according to the required grade, dimensions, quantity, and applicable technical specifications. Available Grades STK290 | STK400 | STK490 | STK500 | STK540 Forms of Supply - Seamless carbon steel tubes - Electric resistance welded (ERW) carbon steel tubes - Hot-finished carbon steel tubes - Cold-finished carbon steel tubes - Round carbon steel tubes - Cut-to-length carbon steel tubes - Customized carbon steel tubes according to project requirements Availability of each form depends on the required grade, dimensions, and manufacturing specifications. Chemical Composition and Mechanical Properties Example grades: STK400 and STK490 Chemical composition (%): STK400: - Carbon (C): 0.25% maximum - Phosphorus (P): 0.040% maximum - Sulphur (S): 0.040% maximum STK490: - Carbon (C): 0.18% maximum - Silicon (Si): 0.55% maximum - Manganese (Mn): 1.65% maximum - Phosphorus (P): 0.035% maximum - Sulphur (S): 0.035% maximum Mechanical properties: STK400: - Minimum yield strength: 235 MPa - Tensile strength: 400 MPa minimum - Elongation: According to applicable specimen and dimensional requirements STK490: - Minimum yield strength: 315 MPa - Tensile strength: 490 MPa minimum - Elongation: According to applicable specimen and dimensional requirements Mechanical properties and elongation requirements depend on tube dimensions, wall thickness, manufacturing method, and test specimen. Final acceptance should be based on the applicable JIS G 3444 edition, purchase specification, and material test certificate. Key Features - Designed for general structural applications - Available in multiple carbon steel grades - Good tensile strength and structural stability - Suitable for welded and fabricated structures - Available in seamless and welded manufacturing options - Suitable for construction and infrastructure projects - Custom dimensions and specifications according to project requirements Applications - Building and construction structures - Structural frameworks and supports - Steel towers and transmission structures - Scaffolding and industrial platforms - Foundation piles and support columns - Road and bridge infrastructure - Industrial sheds and warehouses - Fencing and structural fabrication - General engineering and infrastructure projects Conclusion JIS G 3444 carbon steel tubes are used in construction, infrastructure, and general structural applications requiring strength, durability, and reliability. Grade selection depends on the required mechanical properties and structural design. To place an order or make an enquiry for JIS G 3444 carbon steel tubes, contact Ladhani Metal Corporation with your required grade, dimensions, heat-treatment condition, testing requirements, and quantity. #JISG3444 #JISG3444Steel #JISG3444Standard #JISG3444SteelTubes #CarbonSteelTubes #StructuralSteelTubes #CarbonSteelPipes #SteelTubes #SteelPipes #WeldedSteelTubes #SeamlessSteelTubes #GeneralStructuralSteel #StructuralSteel #MildSteelTubes #MSPipes #MSTubes #ConstructionSteel #BuildingMaterials #InfrastructureSteel #EngineeringSteel #IndustrialSteelTubes #SteelTubeManufacturer #SteelTubeSupplier #SteelTubeExporter #SteelManufacturer #SteelSupplier #SteelExporter #JapaneseSteelStandards #IndustrialMaterials #LadhaniMetalCorporation #Mumbai #Delhi #Chennai #Kolkata #Bengaluru #Hyderabad #Ahmedabad