Iron and other products were available in Bengal, Agra, Allahabad, Delhi and many other places in the Mughal days. Without going into the question whether the industrial organization under the Mughals was weak or not it may be said that in certain respects it was stagnating.
It has been pointed out by Jagadish Narayan Sarkar that the technology on which the industry rested was stagnant as compared to China as also in some countries of Western Europe. Of course there were other weaknesses. The use of coal as fuel, deep mining, etc. was unknown during the Mughal days. Such weaknesses retarded all prospects of far reaching technological development. Thus no sign of industrial revolution was visible.