GB 15CrMoR Steel Plate

Overview of GB 15CrMoR Steel Plate

GB 15CrMoR is a specialized chromium-molybdenum alloy steel plate specified under the GB 713 standard, designed primarily for boilers and pressure vessels operating at elevated temperatures. The “15” indicates the nominal carbon content (0.15%), while “Cr” and “Mo” represent the critical alloying elements of Chromium and Molybdenum, which provide enhanced heat resistance and oxidation stability. The “R” signifies its certification for Pressure Vessels (Rongqi). This grade is the material of choice for equipment where structural integrity must be maintained under sustained thermal stress.

Shandong Tanglu Metal Material Co., Ltd. supplies high-quality GB 15CrMoR plates that are optimized for the petrochemical and energy sectors. Our plates undergo a rigorous Normalizing and Tempering (N+T) heat treatment process to ensure a stable microstructure and superior creep strength. For international B2B procurement, we provide full technical documentation and original Mill Test Certificates (MTC) ensuring total compliance with GB 713 industrial requirements.

Key Features and High-Temperature Advantages

The defining advantage of GB 15CrMoR is its exceptional resistance to hydrogen attack and thermal embrittlement. The addition of Chromium enhances the material’s oxidation resistance, while Molybdenum significantly improves its high-temperature strength and creep resistance. This synergy allows the steel to operate safely in environments ranging from 350°C to 550°C, where standard carbon steels would suffer from loss of strength.

From a fabrication perspective, GB 15CrMoR demonstrates good weldability and workability when handled with professional procedures. Due to its alloy content, preheating and post-weld heat treatment (PWHT) are standard practices to ensure the long-term reliability of the welded joints. Our 15CrMoR plates offer a refined grain structure and high internal purity, making them highly responsive to precision CNC plasma cutting and vessel shell rolling, ensuring safety and performance in the most demanding refinery and power plant applications.

Main Applications of GB 15CrMoR Steel

GB 15CrMoR is essential for the construction of critical high-temperature pressurized equipment. Its primary application is in the fabrication of refinery reactors, catalytic cracking units, and heat exchangers within the petrochemical industry. It is the preferred material for hydrogen-rich environments where resistance to high-pressure hydrogen attack is a safety requirement.

In the power generation industry, 15CrMoR is widely used for high-pressure steam boiler drums, superheater headers, and steam piping. It is also an indispensable choice for the manufacturing of gas storage tanks and separator vessels in chemical processing plants. Due to its proven track record in extreme thermal environments, GB 15CrMoR is the global benchmark for Chromium-Molybdenum alloy pressure vessel plates.