purchase of mill roller shaft and shell purchase of mill roller shaft and shell , financial document , forged and normalized proof machined shaft ( as per drawing ) , size- 440 mm dia. x 4000 mm length, material- 40c8, bis1570 / 1979, technical para meter at normalized, hardness- 175-225 bhn, uts- 58kg / mm2, with material and ultrasonic test certificate, make- bharat forge , supply of new shell for above shaft, size- 825x1525 mm the material to be used special cast iron “open grain type” with composition as under:- carbon -3.2 to 3.6% manganese- 2.2 to 3.2% silicon-1.2 to 2.2% phosphoras-0.5% maximum. sulphur- 0.15% maximum hardness-180 to 210 bhn ( conform to is: 11201-1985 )