ATI Allegheny Ludlum has increased base prices, with shipments from 1 April 2011, by approximately 6% to 9% for stainless cold rolled and hot rolled sheet and strip, tubular quality sheet and strip, continuous mill plate products, and emission control alloys. The company achieved this increase by decreasing the functional discount by two percentage points on most stainless products and raising the base price on continuous mill plate and emission control alloys by USD 0.04 per pound.