Indian engineering conglomerate Escorts expects sustainable growth in its three core businesses for the rest of the year with its 16-17% margin forecast for the railway sector viewed as sustainable, according to CFO Bharat Madan. While it may not achieve the 20% margin seen in Q1 due to varying product mixes, expansion of demand will push growth next year. Mid-single digit growth is predicted for both the tractor and domestic industries, although subdued demand will continue in overseas markets due to general recessionary conditions.