Both the cross rolling method and the extrusion method must first heat the tube blank or ingot, and the steel tube produced is called hot rolling tube. Steel pipes produced by hot working can sometimes be cold worked as required. There are two methods of cold working: one is cold drawing, that is, drawing the QStE340TM automobile girder steel steel pipe through the drawing die to make the steel pipe gradually thin and elongate; the other is cold rolling, which is the method of applying the hot rolling mill invented by the menesmann brothers to cold working. The cold working of QStE340TM automobile girder steel seamless steel pipe can improve the size accuracy and finish of steel pipe, and improve the mechanical properties of materials.
After adding a small amount of niobium, vanadium and titanium to QStE340TM automobile girder steel etc. steel, it is combined with the controlled rolling process to control the precipitation behavior of microalloying elements to achieve the purpose of improving the comprehensive properties of the steel, whether it is strength, toughness, ductile-brittle transition temperature, or Steel's process formability, welding performance, corrosion resistance and crack resistance have been significantly improved, while reducing production costs. Such steel products are widely used in oil and gas pipelines, vehicles, building structures, oil production platforms, pressure vessels, ship shells and many other fields.
S460MC hot-rolled automobile structural steel chemical composition (melting analysis)%C: ≤0.12, Si: ≤0.50, Mn: ≤1.60, P: ≤0.025, S: ≤0.015, Alt: ≥0.015, Nb: ≤0.09, V: ≤0.20, Ti: ≤0.15Mechanical propertiesYield strength MPa: ≥460Tensile strength MPa: 520-670Elongation: ≥14
According to the separate performance report released by India's Jindal stainless steel (Sisal) Co., Ltd. (JSHL), as of March 31, 2020, due to the global economic slowdown, epidemic situation, imports and other factors, its QStE340TM automobile girder steel stainless steel sales decreased by about 10% to 600000 tons from 667000 tons in the previous fiscal year, and its net sales decreased by nearly 7% to 83.396.9 billion rupees, with the same gross operating profit (EBITDA) After tax profit increased by 22.4% to 3.203 billion rupees. The adoption of the new tax system has a positive impact of RS 220 million on after tax profits.
Welcome to contact us through online consulting, emails and hotline if you are interested in our company or products. Our staff will reply you within 24 hours.