HOT ROLLING PRACTICE An Attempted Recollection - insdagrollable temperature in a reheating furnace. This is the starting point of the hot rolling mill practice. Reheating Furnace. • Cold stocks are heated to make them soft and thus suitable for rolling. • Furnace has three parts: walls, roof and hearth. Furnace is lined with several layers of refractory bricks. It is insulated by glass wool.rolling mill practice,ASTM B947 - 14 Standard Practice for Hot Rolling Mill Solution Heat .Abstract. This practice covers hot rolling solution heat treatment for aluminum alloy plate. Aluminum alloy ingots or rolling slabs are preheated prior to being hot rolled. Controls shall be adequate to ensure that the equipment is operated in a manner which precludes overheating of the ingot or rolling slab or deleterious.