|
ROLL
MATERIAL |
GRADE |
SHORE
HARDNESS IN C SCALE |
CHARACTERISTICS |
APPLICATION |
|
NICHILITE CLEAR CHILLED CAST
IRON |
ALLOY CHILLED |
01 |
65-75 |
Good wear resistance & better
surface finish. |
Two & three high plate mills,
intermediate & finishing stands of strip, hoop, rod &
finishing stands of small section mills. |
|
MOLY
CHILLED |
07 |
60-65 |
Good wear resistance & surface
finish |
Finishing stands of Hot Strip
Mill & Plate Mills |
|
NON METALLURGICAL |
RUBBER
MILLS PAPER MILLS |
02 |
60-75 |
Very good surface finish. |
Paper & rubber processing
industries, cigarette & plastic processing industries,
etc. |
|
INDEFINITE
CHILLED CAST IRON |
- |
03 |
45-75 |
Gradual fall of hardness from
surface to center. Good resistance to spalling & fire
cracks. Good wear resistance. |
Intermediate stands of medium & heavy structural mills,
intermediate & finishing stands of billet and section
mills, Non-ferrous section & billet mills, Continuous hot
wide & narrow strip mill work rolls. Three or four
high plate
mill, skelp mill & tube mill. |
|
DOUBLE POURED CAST IRON |
STATIC
INDEFINITE CHILLED |
04
08 |
65-85 |
Excellent surface finish and
very good wear resistance
Shell depth 10-12% easily achievable without sacrificing
strength of rolls. |
Work roll of hot & cold strip
mills, especially in finishing stands, ideal for finishing
of all flat products both ferrous & non-ferrous also
suited for finishing small sections. |
|
CENTRIFUGALLY CAST INDEFINITE
CHILLED |
SPHEROIDAL
GRAPHITE
IRON |
PEARLITIC |
05 |
35-75 |
Excellent toughness & shock
resistance. |
Roughing stands |
|
45-75 |
High strength, nominal drop in
hardness & very good wear resistance |
- |
BAINITIC /
ACCICULAR |
45-75 |
Higher strength & toughness
than pearlitic variety, excellent wear resistance. |
A judicious selection enables
use of these rolls in all stands of practically all types
of mills. |
|
STEEL |
ALLOY CAST STEEL |
06 |
40-70 |
Good toughness & strength.
Uniform hardness distribution. |
Roughing stands of primary
mills. Roughing stands of all heavy & light section mills
& narrow strip & skelp mills. Roughing & intermediate
stands of heavy & medium structural mills. Roughing &
intermediate stands of universal mills, billet mills & bar
mills. Back up roll for hot strip mill. |
|
ADAMITE |
Better surface finish & wear
resistance. Reasonably good strength. Resistance to Heat
crack penetration |
|
HIGH CHROMIUM DOUBLE POURED CAST IRON |
- |
09 |
65-85 |
Very high hardness, excellent
wear resistance , good strength and high polishing
properties |
Finishing stands of hot strip
mills & four high heavy plate mill work rolls. |
|
HIGH SPEED STEEL |
- |
- |
75-85 |
Wear
Resistance
Oxidation Resistance
Fire Crack Resistance |
HSS rolls are
being used in pre-finishing & finishing stands of High
Speed Wire Rod Mills. Finishing stands of Narrow Strip
Mills. Work rolls for roughing stands of Hot Strip Mills.
Work rolls for early finishing stands of Hot Strip Mills.
Finishing stands of small angle & Channel Mills. |
