Introduction of EN10305-4 Precision Tube

What is EN10305

EN10305 is a precision seamless steel pipe material under European standards. This steel tube is widely used in various industrial fields due to its high precision, excellent mechanical properties and good processing performance. Steel tubes under EN10305 standard are usually produced by cold drawing or cold rolling process, which ensures the dimensional accuracy and surface quality of the product. This part of EN10305 specifies the delivery technical conditions of precision cold drawn seamless steel tubes with circular cross-section. The ENI0305 also covers other types of cross-sections. EN 10305 tubes are characterized by precisely specified tolerances and specified surface roughness. Typical applications are in automobiles, equipment and general industrial engineering.

EN10305-4 precision steel tube

EN10305-4 precision steel tube is a high-quality seamless steel tube that meets European standards and is mainly used in hydraulic and pneumatic systems. EN10305-4 precision steel tube (attribute: cold-drawn precision seamless steel tube) has a series of remarkable characteristics and performances. The following is a detailed analysis of its attributes:

Material and process

1. Material

It is often made of high-quality carbon steel materials such as E235 to ensure the strength and toughness of the steel tube.

2. Manufacturing process

Cold drawing: The precision and finish of the precision tube are improved through the cold drawing process.

Non-oxidation bright heat treatment (NBK state): Ensure that the precision tube has no oxide layer during the manufacturing process, improve the cleanliness and service life of the steel tube.

Non-destructive testing: Non-destructive testing of steel tubes to ensure that the quality of precision tubes meets the standards.

Specifications and tolerances

1. Specifications

The outer diameter range is wide, ranging from 4mm to larger sizes, to meet various application requirements.

2. Tolerances

For precision tubes of different outer diameters, there are clear tolerance regulations to ensure the accuracy and consistency of the steel tube.

Surface treatment

1. Inner wall treatment

Brushed and flushed with special equipment to ensure good cleanliness of the inner wall.

2. Outer wall treatment

After anti-rust oil treatment, the steel pipe is effectively prevented from rusting; the two ends are sealed and dust-proofed to prevent pollution.

Features

1. Strong ability to withstand high pressure

Applicable to high-pressure systems to ensure stable operation of the system.

2. Cold bending without deformation

It has good cold bending performance and can be used in complex environments.

3. Expanding and flattening without cracks

Various complex deformations and mechanical processing can be performed to ensure the integrity and reliability of the steel pipe.

Application field

Widely used in hydraulic systems, automobile manufacturing, machinery manufacturing, petrochemicals and other fields, industries with high requirements for precision, finish, cleanliness and mechanical properties of precision pipes.

1. Hydraulic system

Core pipelines such as hydraulic cylinders, tubings, pump valve connectors.

2. Pneumatic system

Cylinders, air valves, control circuit pipelines.

3. Automobile manufacturing

Precision pipelines for fuel system, brake system, and steering system.

4. High-end machinery manufacturing

Textile machinery, printing machinery, hydraulic piping for injection molding machines, etc.

5. Petrochemical instrumentation

Precision measurement and control pipelines.

Delivery status

Common delivery statuses include NBK (+N), GBK (+A), BK (+C), BKW (+LC), and BKS (+SR), etc. Choose the appropriate delivery status according to specific needs.

1. NBK (+N): Non-oxidizing bright annealing (most commonly used, high cleanliness, easy processing).

2. GBK (+A): Annealing.

3. BK (+C): Cold working/hardening.

4. BKW (+LC): Light drawing after cold working.

5. BKS (+SR): Stress relief annealing after cold working.

Summary

EN10305-4 precision steel tubes have shown broad application prospects in hydraulic and pneumatic systems and other fields with their high precision, high strength, high cleanliness and excellent mechanical properties.

Read more: The difference between precision tube and seamless tube or Difference between seamless pipe and seam pipe