S275jr Carbon Steel Pipe Tube

To ensure the performance of S275JR Carbon Steel Pipe Tube during the manufacturing process, the following key process parameters must be carefully controlled:

Chemical Composition: The chemical composition of S275JR steel must be strictly adhered to, with carbon (C) content ranging from 0.21% to 0.24%, manganese (Mn) up to 1.50%, phosphorus (P) up to 0.035%, sulfur (S) up to 0.035%, and silicon (Si) up to 0.55%.

Mechanical Properties: The steel must exhibit a minimum yield strength of 275 MPa and a tensile strength ranging from 430-580 MPa. Elongation should be within 21-25%, depending on the thickness of the material.

Heat Treatment: S275JR steel can undergo various heat treatment processes including annealing, quenching, tempering, and normalizing.

Manufacturing Processes: The pipes can be manufactured using methods such as hot rolling, cold rolling, and electric resistance welding (ERW). Each method requires specific parameters to ensure the quality and integrity of the pipes.

Dimensional Accuracy: Pipes must be manufactured within specified tolerances for outer diameter, wall thickness, and length to ensure proper fit and function in various applications.

Surface Treatment: The surface of the pipes may require treatments such as black painting, varnish paint, anti-corrosion oil, or galvanization to protect against corrosion and extend service life.

Non-Destructive Testing (NDT): Utilize NDT methods like ultrasonic testing and radiographic testing to ensure there are no internal defects or leaks in the pipes.

Hydrostatic Testing: Each pipe must undergo hydrostatic testing to verify its pressure resistance and integrity.

ABOUT US

GNEE Steel Co., Ltd, nestled in Shandong Province-the largest industrial province in China-boasts prime location advantages, with proximity to the Bohai and Yellow Seas, facilitating convenient export transportation. The company specializes in steel products, with popular items including PPGI, galvanized steel coil, steel sheets, stainless steel sheets, seamless and welded steel pipes, aluminum coils, angle bars, H-beam steel, and deformed steel bars. These products meet domestic advanced standards and are widely sold across Northeast, North China, East China, Europe, the Middle East, Southeast Asia, and Australia.

The company's cooperative factory spans approximately 58,000 square meters, with a registered capital of RMB 10 million Yuan and fixed assets valued at RMB 50 million Yuan. Employing over 190 staff, the team includes 12 senior engineers and 20 professional backbone technicians. Equipped with advanced manufacturing equipment, mature technology, and a pool of high-quality management and technical professionals, GNEE Steel operates with a strategic mindset focused on quality for survival and profit for development.

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