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Tubes

Precision Tubes

When a tube becomes a shaft, an axle or a ring-shaped part, its tolerances decide how much work remains before assembly. Seamless cold-drawn precision tubes to EN 10305-1 are made to defined tolerances on outside diameter, inside diameter and wall thickness, so machining can start closer to the finished dimension.

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01Precision tubes

Standards, grades and dimensions

PropertyValueStandard
Outside diameter6 – 100 mm-
Wall thickness1 – 12 mm-
Seamless precision tubesE235+C · E235+N · E355+C · E355+NEN 10305-1
Inspection certificate3.1 to EN 10204 (3.2 on request)EN 10204

+C: cold finished (hard). +N: normalised. Our steel team confirms the availability of each variant before you order.

02Performance & features

Properties that shorten the route to the finished part

In serial production, small deviations multiply. These four properties keep a precision tube predictable from the first part to the last.

Dimensional accuracy

Tight dimensions let the tube integrate precisely into your design and into the manufacturing process that follows.

Surface quality

A defined surface supports machining and assembly, and applications that call for a specific finish.

Controlled mechanical properties

Controlled properties help you match the material to the expected loads and to your technological requirements.

Consistent parameters

Consistent parameters matter most in serial production and wherever components are standardised.

Precision steel tubes

Steel that arrives on spec and on time.

Precision tubes are specified wherever dimensional accuracy, surface quality and consistent material properties decide the result. Compared with general-purpose tubes, their dimensions, tolerances and delivery conditions are defined more strictly.

Seamless precision tubes are particularly suited to machine parts, mechanical components and assemblies in which the material has to meet precisely defined technological requirements. The right combination of steel grade and delivery condition makes further processing easier and brings the finished component closer to its required characteristics.

ALUKÖNIGSTAHL supplies seamless precision tubes to EN 10305-1 in grades E235 and E355 and in selected delivery conditions, from 6 to 100 mm outside diameter and 1 to 12 mm wall thickness.
Precision Tubes
Applications

Where precision tubes are specified

Wherever a component has to fit, move or seal within defined tolerances, precision tubes provide the starting material.

  • Industrial machinery and equipment manufacturing
  • Mechanical components and turned parts
  • Automotive and transportation industries
  • Hydraulic and pneumatic systems, with the appropriate tube type
  • Structures and assemblies with precise dimensional tolerances
automotive_precision_tubes

Innovation in Aluminium Building Systems

A precision tube is defined by two designations. E235 and E355 identify the steel grade, while symbols such as +C and +N describe the processing or delivery condition according to the relevant standard. Specify both, because together they set the mechanical properties the tube arrives with.

Not every precision tube is a hydraulic tube. Hydraulic applications can require additional specifications, such as inside diameter tolerances, surface cleanliness or resistance to specific operating conditions.

Steel grades & delivery conditions

+C

Cold finished (hard)

+N

Normalised

EN 10305-1

Seamless cold-drawn precision tubes

04Selection

How to choose the right precision tube

Your enquiry is complete with these six points:

  1. 01

    Outside diameter

  2. 02

    Wall thickness

  3. 03

    Steel grade

  4. 04

    Applicable standard

  5. 05

    Required delivery condition

  6. 06

    Intended application of the component

If you plan to machine the tube, add your requirements for machinability and mechanical properties.

Not sure which precision tube fits your component?

Tell us the dimension, grade and delivery condition you need, along with the documentation your project requires. Our steel specialists work through the options with you, so the tube you order is ready for the next machining step.

Contact a specialist