With the rapid development of the petroleum industry, demand for high-temperature and corrosion-resistant seamless steel pipes for petroleum cracking is growing. 12Cr5MoI seamless steel pipes for petroleum cracking have become a popular product in the market due to their excellent performance and wide range of applications.
The implementation standard for 12Cr5MoI seamless steel pipes for petroleum cracking is GB/T9948, Seamless Steel Pipes for Petroleum Cracking.
Chemical composition of 12Cr5MoI seamless steel pipe for petroleum cracking: Carbon: ≤0.15, Silicon: ≤0.50, Manganese: 0.30-0.60, Chromium: 4.0-6.0, Molybdenum: 0.45-0.60, Nickel: ≤0.60, Copper: ≤0.20, Phosphorus: ≤0.025, Sulfur: ≤0.015.
Tensile strength of 12Cr5MoI seamless steel pipe for petroleum cracking: 415MPa-590MPa, Lower yield strength: ≥205, Elongation after fracture: ≥22.
Condition of 12Cr5MoI seamless steel pipe for petroleum cracking: Fully annealed or isothermally annealed.
Production methods of 12Cr5MoI seamless steel pipe for petroleum cracking: Hot rolling, cold drawing, hot expansion. Delivery condition: Heat-treated.
Product specifications of 12Cr5MoI seamless steel pipe for petroleum cracking: Outer diameter 19mm-762mm, Wall thickness: 2.0 mm- 150 mm
First, let’s take a look at the chemical composition of 12Cr5MoI seamless steel pipe. This steel pipe is primarily composed of carbon, silicon, manganese, chromium, and molybdenum. The carbon content is controlled below 0.15%, the silicon content does not exceed 0.50%, the manganese content is between 0.30% and 0.60%, the chromium content is between 4.0% and 6.0%, and the molybdenum content is between 0.45% and 0.60%. This precise balance of elements gives 12Cr5MoI seamless steel pipe excellent high-temperature strength and oxidation resistance, enabling long-term use in high-temperature environments without significant performance degradation.
Next, let’s examine the performance characteristics of 12Cr5MoI seamless steel pipe. First, its excellent high-temperature strength and oxidation resistance enable stable operation in high-temperature and high-pressure environments, providing reliable support for petroleum cracking units. Second, this steel pipe exhibits excellent fatigue resistance, capable of withstanding alternating loads and resistant to fatigue cracking, ensuring the long-term reliability of the equipment. 12Cr5MoI seamless steel pipes also offer excellent corrosion resistance, making them suitable for various corrosive environments and providing stable pipeline support for the petroleum cracking process.
In terms of production technology, 12Cr5MoI seamless steel pipes utilize advanced rolling processes and heat treatment systems to ensure the quality and performance of the steel pipes. Precisely controlled rolling temperature and speed during rolling ensure uniform microstructure and high dimensional accuracy. During heat treatment, a full annealing process is used to reduce the hardness and improve the toughness of the steel pipes, making them easier to cut, bend, and drill during subsequent processing.
12Cr5MoI seamless steel pipes for petroleum cracking have a wide range of applications in the petroleum industry. They are primarily used in key locations such as furnace tubes, heat exchanger tubes, and pipelines in petroleum cracking units. During the high-temperature and high-pressure petroleum cracking process, 12Cr5MoI seamless steel pipes ensure the stable transmission of petroleum and cracked products, ensuring the smooth operation of the petroleum cracking process. At the same time, its excellent corrosion resistance enables the steel pipe to operate stably and for extended periods in corrosive media, extending the service life of equipment.
Furthermore, 12Cr5MoI seamless steel pipe is widely used in other chemical industries. In chemical production, many processes require high temperatures, high pressures, or corrosive media, placing extremely high demands on pipe materials. With its excellent high-temperature strength, oxidation resistance, and corrosion resistance, 12Cr5MoI seamless steel pipe meets the requirements of these challenging environments, providing reliable pipeline support for chemical production.
In short, 12Cr5MoI seamless steel pipe for petroleum cracking, with its excellent performance characteristics and wide application range, has become an indispensable material in the petroleum and chemical industries. With continuous technological advancement and market development, we believe the performance of 12Cr5MoI seamless steel pipe will continue to improve, making a greater contribution to the sustainable development of the petroleum and chemical industries.
Post time: Aug-26-2025