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Definite Chill Iron Rolls (Clear Chill Iron Rolls)
   
X250
The working surface of Clear Chill Rolls shows the white graphite free structure consisting of eutectic carbide and transformed austentite. This gives a hard layer which confers good resistance to wear. The core and necks exhibit a tough grey structure, and the iron of the transition zone is mottled.
Compared to grey iron, white chill iron is less soft, strong and incapable of withstanding high dynamic stresses, but owing to its greater hardness, has better wear-resistance, and has high compressive strength. It retains a fair proportion of its strength at elevated temperature, for example, in hot rolling.
These make excellent work rolls for two, three and four-high mills, turning out of high grade ferrous and non-ferrous sheet and strip or section. High Alloy Clear Chill Rolls have proved well suited for the finishing stand of rod and light section mills, for continuous small and medium hot strip mills, and for strip mills of older design.

Properties
Hardness Graph
CHEMICAL COMPOSITION MECHANICAL PROPERTIES
U.T.S. Impact Hardness
C Si Mn Cr Ni Mo kg/mm² kg.m/cm² Shore°C
3.00-3.40 0.20-0.90 0.25-0.60 0.20-0.50 1.00-2.00 0.25-0.35 20-27 0.20-0.25 55-70
3.20-3.60 0.20-0.80 0.20-0.60 0.20-0.50 1.70-2.50 0.25-0.40 20-27 0.20-0.25 70-75
 
 
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