METHOD FOR PIPE WELDING OF LEAN DUPLEX STAINLESS STEEL

摘要

The present invention relates to a method to weld a pipe made of lean duplex stainless steel used in the environment where high strength and high corrosion resistance are required such as a decoration pipe, western tableware, a railway vehicle, etc. The method to weld the pipe made of lean duplex stainless steel uses protection gas which uses inert gas comprising: 8-15 mass% of hydrogen and 2-5 mass% of nitrogen.