work roll,Back-up roll

Forged steel back-up roll is mainly used in 4-Hi mill and 6-Hi mill. The diameter of roll barrel is 350~1400mm. The material of back-up roll includes 60CrMo, 9Cr2Mo, 86CrMoV7, 70Cr3Mo etc.
            
The main types of mills: back-up roll of 650mm Mill, 900mm Mill, 1050mm Mill, 1250mm Mill, 1450mm Mill.
 

Name	Type of material	Hardness	Hardness deviation
Back-up roll	2%Cr,3%Cr,4%Cr,5%Cr	60~80HSD	2-3HSD