Precision seamless steel pipe is a high-precision, high-quality steel pipe. Compared with ordinary seamless steel pipes, it has higher requirements in terms of dimensional accuracy, surface finish, mechanical properties, etc. Precision seamless steel is widely used in fields with high precision requirements, such as automobiles, aerospace, and machinery manufacturing. Nansteel Manufacturing Co., Ltd carefully summarizes the characteristics, processes, and applications of precision seamless steel pipes:
Characteristics of precision seamless steel pipes
High dimensional accuracy: The dimensional deviations of outer diameter, wall thickness and ovality are extremely small, and usually have strict tolerance requirements.
Good surface finish: The inner and outer surfaces are smooth, with low roughness values, and some even require polishing.
Excellent mechanical properties: It has high strength, toughness and plasticity, and can meet the requirements of various complex working conditions.
Uniform organization: Fine grains, dense organization, and stable performance.
Production process of precision seamless steel pipes
The production of precision seamless steel pipes is usually based on hot-rolled seamless steel pipes, which are then made through a series of finishing processes. The main production processes include cold drawing, cold rolling and finishing rolling.
Cold drawing: The hot-rolled pipe is drawn through a die to reduce its diameter and wall thickness, and to improve dimensional accuracy and surface finish.
Cold rolling: The hot-rolled pipe is rolled on a cold rolling mill to further reduce the wall thickness and outer diameter, and to improve dimensional accuracy and surface finish. Cold rolling usually uses multiple passes of rolling, and intermediate annealing is performed to eliminate work hardening.
Finishing rolling: High-precision rolling is performed on a precision rolling mill to obtain extremely high dimensional accuracy and surface finish.
Some precision seamless steel pipes may also be produced directly using precision piercing and rolling processes to reduce subsequent finishing processes.
Application fields of precision seamless steel pipes
Precision seamless steel pipes are widely used in the following fields due to their high precision and high quality:
Automotive industry: used to manufacture key parts such as automobile drive shafts, steering shafts, hydraulic struts, shock absorbers, etc.
Aerospace: used to manufacture aircraft landing gear, hydraulic systems, engine parts, etc.
Machinery manufacturing industry: used to manufacture hydraulic cylinders, cylinders, bearings, precision instruments, etc.
Hydraulic systems: used to manufacture hydraulic pipelines, hydraulic cylinders, etc.
Medical equipment: used to manufacture surgical instruments, medical equipment, etc.
Petrochemical industry: used to manufacture heat exchangers, reactors, etc.
How to choose precision seamless steel pipes?
When choosing precision seamless steel pipes, you should choose according to the specific application requirements:
Determine the specifications: Determine the outer diameter, wall thickness and length of the steel pipe according to the design requirements.
Select the material: Select the appropriate steel grade according to the use environment and working conditions.
Accuracy requirements: Select the appropriate accuracy level according to the accuracy requirements of the parts.
Surface finish: Select the appropriate surface treatment method according to the surface quality requirements of the parts.
Read more: characteristics and Materials of Large Diameter Precision Seamless Steel Pipes
Characteristics of precision seamless steel pipes
High dimensional accuracy: The dimensional deviations of outer diameter, wall thickness and ovality are extremely small, and usually have strict tolerance requirements.
Good surface finish: The inner and outer surfaces are smooth, with low roughness values, and some even require polishing.
Excellent mechanical properties: It has high strength, toughness and plasticity, and can meet the requirements of various complex working conditions.
Uniform organization: Fine grains, dense organization, and stable performance.
Production process of precision seamless steel pipes
The production of precision seamless steel pipes is usually based on hot-rolled seamless steel pipes, which are then made through a series of finishing processes. The main production processes include cold drawing, cold rolling and finishing rolling.
Cold drawing: The hot-rolled pipe is drawn through a die to reduce its diameter and wall thickness, and to improve dimensional accuracy and surface finish.
Cold rolling: The hot-rolled pipe is rolled on a cold rolling mill to further reduce the wall thickness and outer diameter, and to improve dimensional accuracy and surface finish. Cold rolling usually uses multiple passes of rolling, and intermediate annealing is performed to eliminate work hardening.
Finishing rolling: High-precision rolling is performed on a precision rolling mill to obtain extremely high dimensional accuracy and surface finish.
Some precision seamless steel pipes may also be produced directly using precision piercing and rolling processes to reduce subsequent finishing processes.
Application fields of precision seamless steel pipes
Precision seamless steel pipes are widely used in the following fields due to their high precision and high quality:
Automotive industry: used to manufacture key parts such as automobile drive shafts, steering shafts, hydraulic struts, shock absorbers, etc.
Aerospace: used to manufacture aircraft landing gear, hydraulic systems, engine parts, etc.
Machinery manufacturing industry: used to manufacture hydraulic cylinders, cylinders, bearings, precision instruments, etc.
Hydraulic systems: used to manufacture hydraulic pipelines, hydraulic cylinders, etc.
Medical equipment: used to manufacture surgical instruments, medical equipment, etc.
Petrochemical industry: used to manufacture heat exchangers, reactors, etc.
How to choose precision seamless steel pipes?
When choosing precision seamless steel pipes, you should choose according to the specific application requirements:
Determine the specifications: Determine the outer diameter, wall thickness and length of the steel pipe according to the design requirements.
Select the material: Select the appropriate steel grade according to the use environment and working conditions.
Accuracy requirements: Select the appropriate accuracy level according to the accuracy requirements of the parts.
Surface finish: Select the appropriate surface treatment method according to the surface quality requirements of the parts.
Read more: characteristics and Materials of Large Diameter Precision Seamless Steel Pipes
