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DIN 17175
PRODUCT DESCRIPTION
The St35.8 seamless steel pipe, conforming to the DIN 17175 standard and equivalent to the German material number W-Nr.1.0305, is a high-quality carbon steel pipe designed for elevated temperature and pressure applications. Manufactured through hot-rolling or cold-drawing processes, it exhibits excellent mechanical properties, including a minimum tensile strength of 360 MPa and a yield strength of 255 MPa, ensuring reliable performance in demanding environments. The pipe's chemical composition, primarily comprising carbon (≤0.17%), manganese (0.40-0.80%), and silicon (0.10-0.35%), is optimized for weldability and creep resistance at operating temperatures up to 450°C. Widely used in power generation, petrochemical, and boiler systems, this seamless pipe undergoes rigorous testing including hydrostatic pressure checks, non-destructive testing, and dimensional inspections to guarantee leak-proof integrity and compliance with strict industrial safety standards. Its smooth internal surface and uniform wall thickness make it ideal for steam lines, heat exchangers, and high-pressure fluid transportation systems requiring long-term durability under thermal stress.
The St35.8 seamless steel pipe (DIN 17175/W-Nr.1.0305) is extensively utilized in high-temperature and high-pressure industrial systems due to its robust mechanical strength and thermal stability. It serves as a critical component in power plant boilers and superheaters, where it transports steam and hot gases efficiently while maintaining structural integrity under prolonged thermal cycling. In the petrochemical industry, it is employed for refining process pipelines, catalytic cracking units, and high-temperature reactor systems, leveraging its resistance to creep deformation at temperatures up to 450°C. The pipe is also integral to heat exchanger networks in chemical plants and HVAC systems, where its smooth internal surface minimizes friction loss and enhances heat transfer efficiency. Additionally, it is widely adopted in district heating systems, compressed air distribution, and hydraulic machinery requiring leak-proof performance under cyclic stress. Its compatibility with welding, flanging, and bending processes makes it a preferred choice for constructing custom piping layouts in industrial installations, ensuring long-term reliability in environments demanding corrosion resistance, pressure containment, and dimensional precision.
CHEMICAL COMPOSITION
Zhongjing Steel Group (Guangdong) Co.,Ltd. specializes in the production of cold-rolled/hot-rolled coils, carbon steel pipes, bars, and PPGI materials. It is a modern enterprise integrating carbon steel production, processing, and trade. It is a Chinese iron and steel enterprise group.
