Hot rolled round bars

O.R.I. Martin spa produces special steel hot roller round bars in the range of diameters between 15 and 65 mm. Production takes place in a rolling mill at a controlled temperature using the very latest technology which guarantees a fine grain and homogeneous structure; the calibrator finishing block allows bars with limited dimensional tolerances to be rolled.

Diameter Range: 
15-65 mm
EN 10060 P
3000 - 8500 mm
Bundle weight: 
1 - 3 ton
Restricted tolerance: 
< 22 mm +/- 0,15 mm
< 32 mm +/- 0,20 mm
< 38 mm +/- 0,25 mm

Ori Martin Spa

via Cosimo Canovetti, 13
25128 Brescia BS
Phone: +39 030 39991/2/3
Fax Number: +39 030 2000924

Franchi Alberto
Phone: +39 030 3999 205
Fax Number: +39 030 2000924

Tel +39 030 3999 205
Fax +39 030 2000924

Petroboni Alberto
Phone: +39 030 39991
Fax Number: +39 030 2000924

Tel +39 030 3999 272
Fax +39 030 2000924

Lombardi Alessandro
Phone: +39 030 3999214
Fax Number: +39 030 2000924

Tel +39 030 3999 214
Fax +39 030 2000924

Billet warehouse

The billets, with 140x140mm and 160x160mm cross-sectional dimensions and 12 m length, are picked from the warehouse depending on the open orders and prepared for being loaded into the furnace.

Heating furnace

Rolling takes place with carbide rollers at very high speeds at controlled temperatures.


Roughing is the first operation in the rolling process; it occurs at low speed through a series of stands containing cast iron rollers that effect an initial reduction of the billet's cross-sectional dimensions.

Surface checks

A system comprising 4 digital video cameras allows for identifying any type of surface defect, which is then recorded and analysed. As a result, any defective rolled element can be scrapped with extreme precision.


Rolling takes place with carbide rollers at very high speeds at controlled temperatures.


The rolling is finished using vertical and horizontal cages which guarantee limited tolerances.

On line checks

The rolling is inspected at 360 degrees of the surface, through cameras that process the image in 3D.

Cooling plate

The cooling bed guarantees a homogeneous structure. A blade system cuts the bars at the required length.

Bar warehouse

The bars are grouped in bundles then bound and stored in the warehouse.

Hot rolled engineering steel grades for automotive and mechanical industry