Hot rolled peeled tubes

Dimensions(See size range diagram for Hot Rolled Tubes)
Outer diameter > 55 mm
Outer diameter tolerance
+0.25/-0 mm

Wall thickness tolerance

Wall thicknessTolerance on average wall< 12 mm+/- 0.8 mm > 12 mm+/- (5 % x wall thickness + 0.2 mm) Ovality
Max. 65 % of the outer diameter tolerance. Length
Normally hot rolled tubes can be delivered in length between 2.5 - 8.0 m. depending on tube size. Other length must be discussed with Ovako. Straightness
The maximum deviation from a straight line is 1.0 mm on a gauge length of 1000 mm. Surface roughness
Total height of the profile is max. 0.05 mm Heat treatment
Normalizing
Soft annealing
Stress relieving
Isothermal annealing
Controlled cooling (case hardening steels)
Hardening and tempering
Induction hardeningControlled cooling of tubes
After hot rolling, the tubes can be cooled at controlled temperature. The temperature is brought down to about 600 °C (depending on steel grade) and the structure is isothermally transformed to a coarse ferrite-pearlite. The treatment is comparable with isothermal annealing, but it results in a more coarse-grained structure. Controlled cooling gives excellent machinability.

Controlled cooling can be performed on tubes with outer diameter between 100 and 200 mm

Minimum quantities
Hot rolled peeled tubes sourced from our hot rolled
standard tube programme 80 metres

All other peeled tube sizes and steel grades 7,000 kgMarking
Standard: The tubes are marked with grade, size and heat number longitudinally on each tube.
Special: Colour marking on tube ends. Hard stamping (Heat number, dimension etc).Material delivered direct from our mill in Sweden is marked with labels according to the Odette standard.
Standard information, of which some is bar-coded:
– Customer’s name, address, purchase order and part number
– Ovako Steel’s name, number, order, shipping advice and bundle or pallet number
– Steel grade and heat number
– Size
– Weight
– Number of pieces and packages

Special data on customers request.