The machinability of steel is increased by
a) Silicon and sulphur
b) Phosphorous, lead and sulphur
c) Sulphur, graphite and aluminium
d) Phosphorous and aluminium
The machinability of steel is increased by
a) Silicon and sulphur
b) Phosphorous, lead and sulphur
c) Sulphur, graphite and aluminium
d) Phosphorous and aluminium