Best choice for your application

Manufactured in an induction furnace, rolls are cast by centrifugation, which results in excellent structural homogeneity. They are used in the initial and final finishing stands, containing a high-strength gray cast iron or nodular cast iron core, which meets current flexion and displacement requirements of high-productivity rolling mills. Centrifuged cast rolls for finishing stands in hot strip mills are manufactured according to the most modern technologies available today. A wide variety of materials have been developed in high-speed steel, high chromium cast iron and micro-alloyed cast iron, fulfilling the strictest requirements in terms of quality and productivity for rolling mills, associated with longer roll life cycles. Given the great performance of these products in various rolling applications such as continuous, semi-continuous, mini-mills and steckel plants, a strong presence of Gerdau Summit rolls in the global market has been fostered. The main requirements of rolls for hot strip mill applications are mechanical resistance, resistance to thermal fatigue and oxidation, resistance to wear and resistance to adhesion. To assess the performance of these rolls during each application, studies are consisting in characterizing the degradation of the roll surface after rolling are continuously carried out.

How to buy

To purchase Gerdau Summit rolls for hot strip mills applications, you may contact us at the following e-mail: mkt@gerdausummit.com.

Click here to see all of Gerdau Summit products.

Technical Specifications +

VHCRxx (HCI) VHCR11 (HCS) VHSS1/LOLa (HSS) Equalizer (GS-HSS) CIxxS (IC) CIxxVS (IC)
High Chrome Iron High Chrome Steel High Speed Steel High Speed Steel Undefined Cast Iron Microalloyed Cast Iron
C 2,10 - 3,00 1,00 - 2,50 1,00 - 2,00 1,00-2,00 3,00 - 3,60 2,50 - 3,60
Si 0,45 - 0,95 0,45 - 1,00 0,10 - 1,50 0,10-1,50 0,55 - 1,25 1,00 - 3,00
Mn 0,80 - 1,30 0,50 - 0,50 0,10 - 1,00 0,10-1,00 0,45 - 1,30 0,50 - 1,50
Ni 0,90 - 1,90 0,50 - 2,00 0,50 - 2,00 0,50-2,00 4,10 - 4,80 3,00 - 5,00
Cr 14,00 - 18,00 8,00 - 16,00 3,50 - 8,00 3,00-6,00 1,40 - 2,10 1,00 - 2,50
Mo 0,90 - 0,40 0,90 - 3,00 0,50 - 2,50 2,50-5,00 0,25 - 0,70 0,25 - 1,00
V - - 2,00 - 26,00 2,00-5,00 0,00 - 1,50 0,00 - 1,50
W - - 1,50 - 4,50 0,00-2,50 0,00 - 1,50 0,00 - 1,50
Nb+Ti - - 0,00 - 0,40 - 0,00 - 3,00 0,00 - 3,00
Hardness (LD) 710-810 715-780 760-820 750-810 710-810 750-810

Chemical composition in percentage of mass (% wt)

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