STAINLESS STEEL TUBING WITH A MAXIMUM TITANIUM TO CARBON RATIO OF 6

摘要

A longitudinally welded stainless steel tubing and a method for producing the same wherein a continuous band of stainless steel of the composition, in percent by weight, carbon 0.08 max., manganese 2 max., phosphorus 0.045 max., sulfur 0.045 max., silicon 1 max., nickel 1.25 max., chromium 10 to 13.5, titanium at least 0.10 with a maximum titanium to carbon ratio of 6, nitrogen 0.05 max., iron balance, is formed into a generally cylindrical shape to produce a longitudinal seam, heating the metal adjacent said seam to a temperature above the transformation temperature of said steel and bringing the heated edges into contact and at a pressure to cause welding thereof. The tubing is characterized by improved flareability, along with good corrosion resistance, ductility, fabricability and weldability.