work roll is with highest efficiency,optimal performance tool of the mill.
Trade mark Chemical Composition %
C Cr Ni Mo V W Co
High-speed steel 1.5-3.5 2.0-7.0 <2.0 2.0-7.0 4.0-10.0 4.0-10.0 0-10
Mechanical property
Position Item Parameter
Outside Layer Rigidity(HSC) 75-90
Outside Layer Tensile strength(Mpa) 2500-3200
Outside Layer Tensile strength(Mpa) 700-1000
Integrating section Tensile strength(Mpa) 500-700
Core Tensile strength(Mpa) 700-1000
Visual requirement of roll
1)roll surface shall free from defects
2)Casting defects seen with naked eyes are not allowed on the surface of the roll
3)The roll with casting defects on the surface of non-working area,if not affecting usage,can be negotiated with purchaser for delivery
4)Casting defects like discontinuous sand hole ,air hole or porosity existing at the edges of roll,surface of journals,plum head,flat head,shaft of operator side,shall be repaired,the roughness after repairing shall conform to drawing requirement.
Work Roll
