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Alloy Definite Chill

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Alloy Definite Chill Rolls

Double Pour, Flake or Nodular Core.

Alloy definite chill rolls are double poured to maintain the desired level of toughness and thermal properties in the journals and barrel axis. The increased hardness is obtained by alloy additions mainly nickel. Chromium and molybdenum which modify the matrix structure to produce harder acicular phase. The core material can be either flake or nodular iron according to the requirement. The flake core display better thermal properties while the nodular iron achieves greater mechanical strength.

Application

These rolls are used in finishing stands of Bar mills and strip mills.

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Chemical Composition

Hardness Shore C C Mn Si Cr Ni Mo S P UTS Kgf/mm. Sq.
70-75 3.00
3.40		 0.60
0.90		 0.70
1.10		 1.20
1.50		 2.50
3.50		 0.25
0.40		 0.050
Max.		 0.10
Max.		 40-45
75-80 3.10
3.40		 0.60
0.90		 0.70
1.10		 1.50
2.00		 2.50
3.50		 0.30
0.40		 0.050
Max.		 0.10
Max.		 40-45
Core
Grey Iron		 3.00
3.30		 0.40
0.70		 1.30
1.50		 0.30
Max.		 0.20
0.50		 - 0.050
Max.		 0.15
Max.		 20-25
Ductile
Nodular Iron		 3.00
3.30		 0.40
0.70		 1.30
2.00		 0.30
Max.		 0.50
Max.		 - 0.015
Max.		 0.10
Max.		 35-45