347 Stainless Steel Coil is a stabilized austenitic stainless steel specifically engineered for superior intergranular corrosion resistance in welded structures exposed to high temperatures. By adding columbium (niobium) at a minimum of 10 times the carbon content, 347 effectively prevents chromium carbide precipitation in the sensitization temperature range (425-900°C), making it the material of choice for applications involving welding, brazing, or high-temperature service where standard 304 stainless steel would suffer from weld decay. This stabilization approach provides reliable performance in corrosive environments while maintaining excellent mechanical properties across a wide temperature range.

Supplied in continuous coil form, 347 stainless steel offers manufacturers a robust solution for applications requiring both fabrication integrity and elevated temperature stability. The columbium addition forms stable carbides that prevent chromium depletion at grain boundaries, ensuring that welded structures maintain their full corrosion resistance without the need for post-weld heat treatment. Particularly valuable in chemical processing, power generation, and aerospace applications, 347 provides enhanced resistance to intergranular attack while offering better high-temperature strength than standard 304 grades.