The advantages of
15CrMoG boiler steel pipes compared to boiler steel pipes made of other materials are reflected in the following aspects:
First, what are the high-temperature performance characteristics of 15CrMoG boiler steel pipes?
(1) High-temperature creep resistance: During the operation of power plant boilers, the pipes are under high temperature and high pressure for a long time, and the metal will undergo slow creep deformation. 15CrMoG boiler steel pipes contain alloying elements such as chromium and molybdenum, which can significantly improve their creep resistance. They can work stably for a long time in a high-temperature environment of about 550℃ with a low creep deformation rate. Compared with some carbon steel boiler steel pipes, such as 20G, the latter's creep rate increases significantly when it exceeds 450℃, making it difficult to meet the needs of boilers with higher parameters.
(2) Oxidation resistance: Under high-temperature conditions, oxygen easily reacts with the metal surface, causing the pipe material to oxidize and corrode. The alloy composition of 15CrMoG boiler steel pipes helps form a dense protective oxide film on the surface, preventing further oxygen corrosion, slowing down the oxidation rate, and maintaining the mechanical properties and wall thickness of the pipe—a feature unmatched by ordinary carbon steel boiler steel pipes. In boiler environments with high temperatures and sulfur content, ordinary carbon steel corrodes rapidly, while 15CrMoG maintains a better condition.
Second, what are the mechanical properties of 15CrMoG boiler steel pipes?
Strength and toughness balance: The tensile strength of 15CrMoG boiler steel pipes is typically between 440-640 MPa, the yield strength is not less than 235 MPa, and the elongation after fracture is not less than 21%. It possesses both high strength to withstand steam pressure and prevent pipe rupture, and good toughness, preventing brittle fracture when subjected to impacts and vibrations, such as the thermal stress impact during boiler start-up and shutdown. This makes it more suitable for complex working conditions than some high-strength but low-toughness alloy steels.
Third, what are the processing properties of 15CrMoG boiler steel pipes?
(1) Welding adaptability: Although 15CrMoG boiler steel pipes are alloy steel, high-quality welding can be achieved by using appropriate welding processes, selecting matching welding rods, and performing preheating before welding and heat treatment after welding. Compared with some high-alloy steels, its welding difficulty is relatively moderate; compared with carbon steel, the joint strength and toughness after welding are more guaranteed, and the performance of the heat-affected zone is more stable.
(2) Cold working feasibility: It has a certain cold working capability. During on-site installation, appropriate cold-bending operations can be performed to adjust the pipe routing to meet the complex spatial layout requirements of the boiler, which is difficult to achieve with some brittle high-temperature alloy pipes.
Fourth, what is the cost-effectiveness of 15CrMoG boiler steel pipes?
Outstanding cost-performance ratio: Compared with high-end heat-resistant stainless steel pipes, 15CrMoG boiler steel pipes meet the basic performance requirements of medium-high temperature and medium-high pressure power plant boilers while having a lower cost. Unlike stainless steel, which contains large amounts of expensive elements such as nickel, it is more affordable to purchase and has relatively low maintenance and replacement costs, saving considerable expenses for power plant construction and operation.
Threeway Steel is known as a professional supplier engaged in manufacturing and distributing a wide range of steel pipe, and our headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
