Back-up rolls

Back-up rolls

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Our back-up rolls are forged in press from 4000 and 6000 ton. High quality of steel and machines for heat treatment guaranteed optimal properties and customer’s requests.
 
Back-up rolls are produced in the following dimensional range:

  • from 400 up to 850 mm diameter
  • up to 5500mm length
  • up to 10000 kg weight
  • up to 54-56 HRC hardness

 
 
 
 

MOST FREQUENTLY USED STEEL GRADES

RAVNE W. Nr. DIN SAE-AISI CHEMICAL COMPOSITION (%) HARDNESS HRC
  C Cr Mo V Ni
OHV3 1.2304 85CrMo7   0,85 1,70       ≤ 67,5
OHV4 1.2327 86CrMoV7   0,85 1,70 0,30 0,10   ≤ 67,5
OHV5 1.2375 83CrMoV9   0,88 2,10 0,25 0,10   ≤ 67,5
OTV       0,70 3,00 0,50 0,10   ≤ 66
OTV1       0,80 3,00 0,50 0,10   ≤ 66
OTV1B       0,80 5,00 0,50 0,10   ≤ 66
OTVN       0,70 3,10 0,32 0,10 0,70 ≤ 66
VCMO140 1.7225 42CrMo4 4140- 0,40 1,10 0,20     ≤ 60

 

Rešitve

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Renewal of used cylinders
Renewal of used cylinders
We offer a complete hydraulic and mechanical service of cylinders,...
Rapid cooling of rolls
Rapid cooling of rolls
Optimal mechanical properties are achieved by using a combined heat...

Latest accomplishments

Upgrade of portual crane – Genoa
Production hall - Belluno
Stairways on crane - Marseille
Publishing house - Liverpool
Stairways on crane - New Jersey
Parts of portual crane - Le Havre