tender for supply of cast iron mill roller with forged iron shaft- cast iron mill roller with forged steel shaft.mill roller size: dia-1080 mm x length- 2040 mm.journal size- 510mm diameter x 660mm length.roller shall be of coarse grain cast iron having hardness 180 to 210 bhn.the composition of the shell material shall confirm to is:1985 and shall be:total carbon: 3.20 to 3.6 percent.manganese – 2.2 to 3.2 percentsilicon – 1.2 to 2.2 percentphosphorus – 0.5 per cent max.sulphur – 0.15 percent max.the cast iron shell shall be hot shrunk on forged steel shaft of 45c8 quality confirming to is: 1570 having a minimum tensile strength of 58kg / mm2. shaft shall have square ends not less than 425mm square. ( as per drawing ) roller will be provided without grooving ( plain ) .all test reports of shaft and shell to be provided at the time of supply.make-jassal mechanical / jassal engineers.