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Chemical composition and mechanical properties: The material contains carbon in the range of 0.37 to 0.45%, silicon from 0.17 to 0.37%, manganese between 0.5 and 0.8%, and chromium ranging from 0.8 to 1.1%. After annealing, the hardness is below 207 HBS, while normalizing results in a hardness of less than 250 HBS. For conditioning treatment, samples with a diameter of 25 mm are first quenched at 850°C using oil quenching, followed by tempering at 520°C. This process yields a tensile strength of 1000 MPa, a yield strength of 800 MPa, an elongation of 9%, a reduction in area of 45%, and an impact toughness of 588.3 kJ/m².
This steel is available in two main forms based on the manufacturing process: hot-rolled (extruded) seamless tubes and cold-drawn (cold-rolled) seamless tubes. Cold-drawn tubes can further be categorized into round tubes and shaped tubes, offering versatility for different applications. Whether used in structural components, hydraulic systems, or mechanical parts, this material provides excellent balance between strength, ductility, and machinability. Its composition and heat treatment make it suitable for a wide range of industrial uses where durability and performance are essential.
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