Spheroidal Graphite Cast Iron Rolls

Nodular Cast Iron Rolls Also called as Spheroidal Graphite Iron Rolls (SG Iron) is considered as one of the most versatile roll materials now a days. It is produced by a small proportion of magnesium added to the melt as nickel-magnesium or alternative alloy, or as pure magnesium. Microstructure: Pearlite Application: Roughing Rolls for bar and wire rod mills. Chemical composition and surface hardness C Si Mn P S Cr Ni Mo Barrel Hardness HSD Pearlite II 2.90-3.60 0.80-2.50 0.40-1.20 ≤0.20 ≤0.03 0.20-1.20 2.01-2.50 0.20-0.80 55-70 Pearlite III 2.90-3.60 1.00-2.00 0.40-1.00 ≤0.15 ≤0.03 0.20-1.20 2.51-3.00 0.20-0.80 63-73 Neck Hardness(HSD): 35-55 Core Tensile strength: 350Nnm2 min