Seam­less, hot-rolled steel tubes - hollows

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Description

Hot-rolled hollows are a key raw material in the metalworking industry and serve as preforms for the production of seamless tubes. They are manufactured through forming processes at high temperatures, which results in a homogeneous microstructure and improved mechanical properties.

Your benefits

  • Excellent dimensional accuracy for outer diameters and wall thicknesses
  • Very good surface finish
  • Wide variety of steel grades in various supply conditions
  • Wide range of lengths

Dimensions

Outside diameter
from to
17.2 mm 133 mm
0.677 inch 5.236 inch
Wall thickness
from to
2 mm 20 mm
0.079 inch 0.787 inch
Other dimensions available upon request
Detailed Dimensions Table

Further information

Lengths

We supply hot-rolled tubes in lengths ranging from 5 m to 22.5 m (16.4 ft to 73.8 ft).

Standards & materials

We produce our steel tubes in accordance with internationally recognized standards and use different, carefully selected materials depending on the application. You will find various standards and the materials specified therein under the following link. Further standards can be agreed on request. Additionally, properties and materials outside the usual standards can be specified and agreed. Our Technical Customer Support will support you in all matters relating to material selection and technology.

Learn more about standards & materials
Delivery conditions
Designation Symbol Description
As rolled +AR After heating to the austenitic range (above the Ac3-temperature), the tubes are formed without a subsequent heat treatment.
Soft annealed +A The tubes are subjected to annealing slightly below the Ac1-temperature.
Normalized rolled +N The tubes are rolled in a temperature range that generates the delivery condition +N and is equivalent to the normalized condition.
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Tests
Picture of a manual inspection of the tube dimensions

We conduct tests in accordance with the requirements of the relevant standard.

Additional tests can be agreed upon.

Learn more about tests
Mannesmann Precision Tubes and Mannesmannröhren-Werk
Production
process
Mannesmann Precision Tubes and Mannesmannröhren-Werk
CERTIFICATES &
APPROVALS
Mannesmann Precision Tubes and Mannesmannröhren-Werk (Europe)
Material-
declarations

Individual

Advice

Our sales team and technical experts are ready to assist. We look forward to working with you!

Sales Hot-rolled tubes

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Technical Customer Support

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