SPHEROIDAL GRAPHITE (NODULAR) CAST IRON (S.G.I PEARLITIC) ROLLS

These Rolls are essentially an Indefinite Chill type material, but with the Graphite in Nodularform instead offlake and having alloyed with higher % of Nickel & Molybdenum along with Carbon. So these rolls have a much higher Mechanical Strength and allow the use of Iron Rolls in applications which would re-present too high a duty for a flake iron quality due to internal 'notch effect' of nodular graphite is relatively small. These rolls are very much suitable for the rolling of row products with wide range of applications due to its hardness penetration, good wear resistance and tough necks, this material has become a benchmark.

 

Typical Physical Properties
  N/mm2 Tons/sq.in.
Tensile Strenght 400 25
Bending Strenght 850 55
 
Range of Chemical Composition
C% Mn% SI% Cr% Ni% Mo% Cu% S% P%
3.00 0.20 1.20 0.20 1.50 0.20 0.25 0.015 0.060
4.00 1.00 2.50 1.00 3.00 1.00 Max Max Max
 
Typical Physical Properties
  N/mm2 Tons/sq.in.
Tensile Strenght 400 25
Bending Strenght 850 55
Application
Product Type of Mill Position
Billets & Sheet Bar 2 & 3 High Finishing
Billets & Sheet Bar Continuous All Positions
Beams Universal Vertical
Medium Sections 2 & 3 High Intermediate & Finishing
Small & Medium Sections Straightening  
Bar & Small Sections 2 & 3 High All Positions
Rod 2 & 3 High Roughing & Intermediate
Plate 2 High Finishing
Plate 3 High All Positions
Plate 4 High Roughing & Intermediate
Sheet 2 & 3 High Finishing
Wide Strip 2 & 4 High Roughing
TMT & Wire Rod 2 High Roughing & Intermediate
 
Typical Hardness (Shore*C)
SG-PC47 45-50
SG-PC50 48-53
SG-PC53 50-55
SG-PC55 53-58
SG-PC58 55-60
SG-PC60 58-63
SG-PC63 60-65
SG-PC65 62-67
SG-PC67 65-70
SG-PC73 70-75