First, what are the materials and properties of
15CrMoG alloy steel pipes?
Material: 15CrMoG alloy steel pipes belong to the pearlitic heat-resistant steel family, containing alloying elements such as chromium and molybdenum. These elements endow the steel pipes with excellent high-temperature performance and corrosion resistance.
High-Temperature Strength: At high temperatures, 15CrMoG alloy steel pipes possess high thermal strength (δb≥440MPa), capable of withstanding stress under high-temperature and high-pressure environments, maintaining structural stability and safety.
Oxidation Resistance: This steel pipe exhibits good oxidation resistance, enabling long-term use in high-temperature oxidizing environments without significant oxidation corrosion, thus extending the service life of the steel pipe.
Hydrogen Corrosion Resistance: 15CrMoG alloy steel pipes also possess a certain degree of hydrogen corrosion resistance, making them suitable for applications such as chemical equipment in hydrogen-rich environments.
Second, what are the application areas of 15CrMoG alloy steel pipes?
Power Industry: 15CrMoG alloy steel pipes are widely used in the power industry, mainly for manufacturing high-pressure boilers, superheater tubes, and high- and medium-pressure pipelines with steam parameters of 510℃.
Petrochemical Industry: In the petrochemical field, this steel pipe can be used to transport high-temperature and high-pressure fluids, such as in synthesis tower outlet pipelines and other environments requiring resistance to hydrogen corrosion.
Other Fields: In addition, 15CrMoG alloy steel pipes can also be used in geological drilling, shipbuilding, and other fields as pressure-bearing components or structural parts.
Third, what are the details of the manufacturing process and standards for 15CrMoG alloy steel pipes?
Manufacturing Process: The manufacturing process of 15CrMoG alloy steel pipes includes two methods: hot rolling (extrusion) and cold drawing (rolling). The hot rolling process includes steps such as billet heating, piercing forming, and sizing cooling; the cold drawing process requires annealing, pickling, and multiple cold working processes.
Execution Standards: The execution standards for this steel pipe include GB5310-2008, etc. These standards specify the requirements for the chemical composition, mechanical properties, and dimensional tolerances of the steel pipe, ensuring its quality and reliability.
Fourth, what are the dimensions and specifications of 15CrMoG alloy steel pipes?
Outer Diameter and Wall Thickness: The outer diameter and wall thickness of 15CrMoG alloy steel pipes can be customized according to user needs. Common outer diameter ranges from 16mm to 480mm, and wall thickness ranges from 3mm to 50mm.
Length: The length of hot-rolled pipes is usually 3m to 12.5m, while the length of cold-drawn pipes is 1.5m to 9m. Users can choose the appropriate length according to their actual needs.
Fifth, what are the details of welding and heat treatment for 15CrMoG alloy steel pipes?
Weldability: Due to the high content of alloying elements such as Cr and C in 15CrMoG alloy steel pipes, the steel has a significant hardening tendency and poor weldability. Therefore, preheating measures and the use of special welding materials are required during the welding process.
Heat treatment: Post-weld high-temperature tempering is usually required to relieve welding stress and improve joint microstructure and properties. Precise control of parameters such as heating/cooling rates and holding time is necessary during heat treatment.
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.
