15CrMo Hot Rolled Plates for Boilers and Pressure Vessels

15CrMo hot rolled plates, compliant with GB/T 3077-2015 and GB 5310, are high-strength, low-alloy steel plates designed for high-pressure boilers and pressure vessels operating at pressures above 9.8 MPa and temperatures between 450°C and 650°C. These plates are manufactured through hot rolling, a process involving heating steel billets above recrystallization temperature (typically 900–1200°C), followed by rolling to achieve desired thickness and mechanical properties. Heat treatments like normalizing or quenching and tempering enhance toughness, hardenability, and thermal strength.

Available in thicknesses from 6 mm to 60 mm, widths from 1500 mm to 3000 mm, and lengths up to 12000 mm, 15CrMo hot rolled plates are ideal for applications requiring robust performance under high-temperature and high-pressure conditions, such as boiler shells, steam drums, and petrochemical reactors. The alloy’s composition, including chromium (0.80–1.10%) and molybdenum (0.40–0.55%), ensures excellent oxidation resistance and resistance to hydrogen corrosion. Surface treatments like pickling or oiling protect against rust, and rigorous testing (tensile, Charpy V-notch, and ultrasonic) ensures compliance with standards.

Compared to cold-rolled plates or other grades like ASTM A516 Grade 70, 15CrMo hot rolled plates offer superior thermal strength and cost-effectiveness due to the hot rolling process, which reduces production costs while maintaining high mechanical properties. Weldability is moderate, requiring specific welding materials (e.g., E5515-B2 electrodes) and post-weld heat treatment to minimize weld seam hardness. These plates are widely used in power generation, petrochemical, and chemical industries for applications like pressure vessel components, superheater panels, and hydrocracking units.

15CrMo hot rolled plates provide a reliable, durable, and economical solution for demanding industrial applications, ensuring safety and performance in high-temperature, high-pressure environments.

In the long-term operation of 15CrMo steel in the working temperature range of 500°C - 550°C, pearlite spheroidization will occur, and alloying elements will be between solid solution and carbide. The redistribution and the change of the structure of the carbide phase, the thermal strength and mechanical properties of the 15CrMo steel gradually decrease with the degree of spheroidization of the pearlite and the degree of depletion of the solid solution, so that the material gradually deteriorates or even fails. Therefore, the degree of pearlite spheroidization in 15CrMo steel structure has long been widely used as one of the important criteria for determining the reliability of the use of this type of steel.

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Note: 15CrMo hot rolled plates comply with GB 5310 and GB/T 3077-2015 standards. For detailed specifications, refer to the standards or contact a certified supplier.

Industrial Applications

15CrMo hot rolled plates are essential for high-pressure boilers, pressure vessels, and petrochemical systems, offering superior strength and corrosion resistance.