In modern industry, seamless steel pipes have become an indispensable and important material with their unique properties and wide application fields. Among the many materials of seamless steel pipes, carbon steel No. 20 seamless steel pipes have won the favor of many industries with their excellent performance and wide application fields. This article will introduce the performance knowledge of carbon steel No. 20 seamless steel pipes in detail so that readers can better understand this material.
Material properties of carbon steel No. 20 seamless steel pipe
Carbon steel No. 20 seamless steel pipe is made of high-quality carbon structural steel material with high strength and excellent processing performance. This type of steel pipe has a low carbon content and belongs to the category of low-carbon steel pipe, so its toughness, plasticity and weldability are good. In addition, carbon steel No. 20 seamless steel pipe also has a certain cold deformation plasticity, which is suitable for processing technologies such as bending, rolling, flanging and hammer arching.
In terms of chemical composition, carbon steel No. 20 seamless steel pipe mainly includes elements such as carbon, silicon, manganese, sulfur, phosphorus, chromium, nickel and copper. Among them, the carbon content is 0.17-0.24%, the silicon content is 0.17-0.37%, the manganese content is 0.35-0.65%, the sulfur and phosphorus contents are not higher than 0.035%, and the chromium, nickel and copper contents are not higher than 0.25%. The reasonable combination of these elements makes the carbon steel No. 20 seamless steel pipe have excellent comprehensive properties.
Mechanical properties of carbon steel No. 20 seamless steel pipe
The mechanical properties of carbon steel No. 20 seamless steel pipe are also an important manifestation of its excellent performance.
The tensile strength σb (MPa) of this steel pipe shall not be less than 410 (42), the yield strength σs (MPa) shall not be less than 245 (25), the elongation δ5 (%) shall not be less than 25%, and the cross-sectional reduction rate ψ (%) shall not be less than 5%. These performance indicators show that carbon steel No. 20 seamless steel pipe has high strength and toughness, can withstand large tension and pressure, and has good plastic deformation ability.
In addition, the hardness of carbon steel No. 20 seamless steel pipe is also moderate, not exceeding 156HB without heat treatment. This hardness makes the steel pipe less likely to crack and deform during processing and use, ensuring its service life and safety.
Welding performance of carbon steel No. 20 seamless steel pipe
The welding performance of carbon steel No. 20 seamless steel pipe is also an important manifestation of its excellent performance. This type of steel pipe has excellent arc welding and contact welding performance, and the welded joints have high strength and good toughness. At the same time, the gas welding performance of carbon steel No. 20 seamless steel pipe is also good, but cracks are prone to occur during gas welding for parts with small thickness, strict appearance requirements or complex shapes. Therefore, the selection of welding method needs to be considered according to the specific application scenario.
Application fields of carbon steel No. 20 seamless steel pipe
The application fields of carbon steel No. 20 seamless steel pipe are very wide. Due to its high strength and toughness, as well as excellent processing and welding properties, this steel pipe is widely used in petroleum, chemical, machinery, construction and other fields. In the petrochemical industry, carbon steel No. 20 seamless steel pipe is one of the main pipeline materials for conveying fluid media. In the field of mechanical manufacturing, this type of steel pipe is often used to manufacture shafts, rods, bolts and other parts for vehicles such as automobiles, tractors and motorcycles.
In the construction field, carbon steel No. 20 seamless steel pipe is used for supporting structures and frames of high-rise buildings, bridges, tunnels and other structures. In addition, carbon steel No. 20 seamless steel pipe is also used in the manufacture of wire casing, pipelines for transporting oil and natural gas, etc. These application fields fully demonstrate the wide applicability and excellent performance of carbon steel No. 20 seamless steel pipe.
Read more: The Main Production Costs of Precision Seamless Steel Pipes
Material properties of carbon steel No. 20 seamless steel pipe
Carbon steel No. 20 seamless steel pipe is made of high-quality carbon structural steel material with high strength and excellent processing performance. This type of steel pipe has a low carbon content and belongs to the category of low-carbon steel pipe, so its toughness, plasticity and weldability are good. In addition, carbon steel No. 20 seamless steel pipe also has a certain cold deformation plasticity, which is suitable for processing technologies such as bending, rolling, flanging and hammer arching.
In terms of chemical composition, carbon steel No. 20 seamless steel pipe mainly includes elements such as carbon, silicon, manganese, sulfur, phosphorus, chromium, nickel and copper. Among them, the carbon content is 0.17-0.24%, the silicon content is 0.17-0.37%, the manganese content is 0.35-0.65%, the sulfur and phosphorus contents are not higher than 0.035%, and the chromium, nickel and copper contents are not higher than 0.25%. The reasonable combination of these elements makes the carbon steel No. 20 seamless steel pipe have excellent comprehensive properties.
Mechanical properties of carbon steel No. 20 seamless steel pipe
The mechanical properties of carbon steel No. 20 seamless steel pipe are also an important manifestation of its excellent performance.
The tensile strength σb (MPa) of this steel pipe shall not be less than 410 (42), the yield strength σs (MPa) shall not be less than 245 (25), the elongation δ5 (%) shall not be less than 25%, and the cross-sectional reduction rate ψ (%) shall not be less than 5%. These performance indicators show that carbon steel No. 20 seamless steel pipe has high strength and toughness, can withstand large tension and pressure, and has good plastic deformation ability.
In addition, the hardness of carbon steel No. 20 seamless steel pipe is also moderate, not exceeding 156HB without heat treatment. This hardness makes the steel pipe less likely to crack and deform during processing and use, ensuring its service life and safety.
Welding performance of carbon steel No. 20 seamless steel pipe
The welding performance of carbon steel No. 20 seamless steel pipe is also an important manifestation of its excellent performance. This type of steel pipe has excellent arc welding and contact welding performance, and the welded joints have high strength and good toughness. At the same time, the gas welding performance of carbon steel No. 20 seamless steel pipe is also good, but cracks are prone to occur during gas welding for parts with small thickness, strict appearance requirements or complex shapes. Therefore, the selection of welding method needs to be considered according to the specific application scenario.
Application fields of carbon steel No. 20 seamless steel pipe
The application fields of carbon steel No. 20 seamless steel pipe are very wide. Due to its high strength and toughness, as well as excellent processing and welding properties, this steel pipe is widely used in petroleum, chemical, machinery, construction and other fields. In the petrochemical industry, carbon steel No. 20 seamless steel pipe is one of the main pipeline materials for conveying fluid media. In the field of mechanical manufacturing, this type of steel pipe is often used to manufacture shafts, rods, bolts and other parts for vehicles such as automobiles, tractors and motorcycles.
In the construction field, carbon steel No. 20 seamless steel pipe is used for supporting structures and frames of high-rise buildings, bridges, tunnels and other structures. In addition, carbon steel No. 20 seamless steel pipe is also used in the manufacture of wire casing, pipelines for transporting oil and natural gas, etc. These application fields fully demonstrate the wide applicability and excellent performance of carbon steel No. 20 seamless steel pipe.
Read more: The Main Production Costs of Precision Seamless Steel Pipes
