Cold drawn precision steel tubes  >  Cold drawn profiles

Cold drawn profiles

The voestalpine Präzisrohtechnik GmbH turns drawing into a fine art – and can make sections with a development of up to 160 mm and wall thickness of up to 14 mm. These include both standard and precision lengths with defined specifications, such as straightness and torsion. The particular advantage for steel engineering is that the fibre structure is not interrupted.
Profiles
The application of profiles is advantageous if the tube has to cover special technical criteria:

dimensional accuracy for inner/ outer diameter
smooth surface and targeted mechanical characteristics
high strength.

Manufacturing programme

The voestalpine Präzsirohrtechnik delivers cold drawn profiles in the following steel grades and conditions: 


 

Steel grades
all low alloyed qualities of structural steel, case-hardened and heat-treated steel, nitrieded steel, fine grain grades, high-temperatured steels - as
St30 - St52, CK10, CK22, 15Cr3, 2OMnCr5, 25CrMo4, 42CrMo4, Cf53, 50CrV4, 13CrMo44, 34CrAlMo5, 10Ni14, StE240- StE500

Delivery conditions

• cold finished, hard (BK)
No heat treatment following final cold finishing. The tubes can thererfore only be formed to a limited extent


• cold finished, soft (BKW
After final heat treatment the tubes are cold drawn to a slight degree. If further processed properly the tubes can be cold formed within certain limits (e.g. bending, expanding)


• cold finished and stress relieved (BKS)
Following final cold finishing the tubes are heat treated at 550°-620°C. Due to the reduction in internal stress the tube can be formed or machined within certain limits if further processed properly.


• annealed (GBK)
After final cold finishing the tubes are annealed in an inert atmosphere.


• normalised (NBK)
Following the final cold finishing process the tubes are annealed in an inert atmosphere above teh upper transformation point.


• tempered (V)
The final condition is defined as heat treated for special mechanical and technological properties.

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