Process of manufacturing cylindrical hollow bodies and the use thereof

摘要

Production of cylindrical hollow bodies having a circular cross-section comprises forming a tube blank from a remelting ingot; molding to a tubular body by extrusion with a degree of deformation of at least 6 times; and optionally further processing. Preferred Features: The remelting ingot is made from a corrosion resistant martensitic steel containing (in wt.%) 12-29 Cr, 0.02-5.9 Mo, 0.05-0.8 C and 0.05-0.8 N; or 0.3-3.0 Mn, 12.1-28.0 Cr, 0.25-5.8 Mo, 0.01-3.0 Ni, 0.05-2.0 V, 0.15-0.7 C and 0.15-0.7 N.