In the vast field of metallic materials, stainless steel, with its unique corrosion resistance, high-temperature resistance, and excellent mechanical properties, has become an indispensable key material in many industrial sectors. Among the wide varieties of stainless steel, 347 stainless steel and its derivative—347 seamless stainless steel pipes—occupy a pivotal position in various industries such as petroleum, chemical, nuclear power, and food processing due to their outstanding comprehensive performance.
Details of 347 Seamless Stainless Steel Pipe
1. Commonly used standards for 347 seamless stainless steel pipe: ASTM A312, ASME SA312, ASTM 213M, ASME SA213, GB/T14976
2. Specifications of 347 seamless stainless steel pipe: Outer diameter 10mm~762mm, wall thickness: 1mm~100mm.
3. Chemical composition of 347 seamless stainless steel pipe: C:≤0.08, Si:≤1.00, Mn:≤2.00, P:≤0.035, S:≤0.030, Ni: 9.00~12.00, Cr: 17.00~19.00, Nb: 10*C~1.10
First, the basic characteristics of the 347 seamless stainless steel pipe.
347 stainless steel belongs to the austenitic stainless steel series, and its standard grade is UNS S34700. It is a niobium-stabilized stainless steel. Compared to the common 304 stainless steel, 347 stainless steel, through the addition of niobium to its composition, possesses excellent oxidation resistance, high strength, and superior toughness, making it perform exceptionally well in high-temperature, high-pressure, and corrosive media.
Second, the characteristics and applications of 347 seamless stainless steel pipes.
As an important processing form of 347 stainless steel, 347 seamless stainless steel pipes, through seamless production processes, ensure a smooth inner wall and no weld seams, further enhancing the pipe’s pressure-bearing capacity and corrosion resistance. This type of pipe not only inherits all the advantages of 347 stainless steel but also, due to its seamless structure, exhibits higher reliability and service life when subjected to high pressure, high temperature, and corrosive fluids.
1. Oil and Gas Industry: In the extraction and transportation of oil and gas, 347 seamless stainless steel pipes, due to their excellent high-temperature resistance and corrosion resistance, are widely used in oil well casing, gathering and transmission pipelines, refinery equipment, and other fields, ensuring the safe and efficient utilization of oil and gas resources.
2. Chemical Industry: In chemical production, the presence of corrosive media places extremely high demands on pipeline materials. 347 seamless stainless steel pipes, with their excellent chemical corrosion resistance, have become key components in chemical equipment, reactors, and piping systems, ensuring the stable operation of chemical production.
3. Nuclear Power Plant Construction: Nuclear power plants have extremely stringent requirements for the high-temperature resistance, radiation resistance, and corrosion resistance of materials. Due to their superior comprehensive performance, 347 seamless stainless steel pipes are widely used in cooling systems, steam generators, reactor structures, and other parts of nuclear power plants, providing a solid material foundation for nuclear power safety.
Third, the Production Process of 347 Seamless Stainless Steel Pipes.
The production process of 347 seamless stainless steel pipes can be roughly divided into several key stages: raw material preparation, smelting and casting, hot rolling and piercing, cold drawing or cold rolling, heat treatment, and inspection.
1. Raw Material Preparation: High-quality 347 stainless steel billets are selected to ensure that the chemical composition and physical properties of the steel pipes meet the standard requirements.
2. Hot Rolling and Piercing: After the smelted billets are heated to an appropriate temperature, they are pierced through a hot rolling mill to form a preliminary tubular structure.
3. Cold Drawing or Cold Rolling: After hot rolling and piercing, the steel pipe undergoes multiple cold drawing or cold rolling processes to gradually reduce the pipe diameter, improving the pipe’s precision and surface quality.
4. Heat Treatment: The cold-worked steel pipe undergoes solution treatment and stabilization treatment to eliminate processing stress and improve the material’s overall performance.
5. Inspection and Testing: Comprehensive quality inspection is conducted on the finished pipes, including but not limited to chemical composition analysis, mechanical property testing, and intergranular corrosion testing, ensuring that each steel pipe meets standard requirements.
Fourth, Market Status and Development Trends of 347 Seamless Stainless Steel Pipes.
With the continuous growth of the global economy and the acceleration of industrialization, the demand for 347 seamless stainless steel pipes has been increasing year by year. Especially in the fields of new energy, high-end equipment manufacturing, and environmental protection, the demand for high-performance stainless steel materials is increasingly strong, providing a broad market space for the development of 347 seamless stainless steel pipes.
- Technological Innovation: With the continuous progress of materials science, the research and development of 347 seamless stainless steel pipes is moving towards higher strength, higher corrosion resistance, and better processing performance. By optimizing alloy composition and improving production processes, the overall performance of products is continuously enhanced to meet diversified market demands.
- Intelligent Production: With the rapid development of intelligent manufacturing technology, the production of 347 seamless stainless steel pipes is gradually becoming automated and intelligent. By introducing advanced production equipment and technology, production efficiency is improved, and production costs are reduced. Simultaneously, by utilizing big data, the Internet of Things, and other technologies, precise control and remote monitoring of the production process are achieved, improving product quality and service levels.
- Customized Services: Facing increasingly fierce market competition, providing personalized and customized services has become key to enhancing enterprise competitiveness. Based on specific customer needs, comprehensive solutions from product design and production to after-sales service are provided to meet diverse customer requirements.
In conclusion, 347 seamless stainless steel pipes, with their unique performance advantages and wide range of applications, play an important role in global industrial development. In the future, with continuous technological advancements and sustained market development, 347 seamless stainless steel pipes will usher in even broader development prospects, contributing to the promotion of global industrial upgrading and sustainable development.
Post time: Nov-25-2025