Development of a new 'lean' duplex stainless steel, AL 2003~(TM) Alloy (UNS S32003)

摘要

The S32003 alloy has displayed excellent corrosion resistance, mechanical properties, weldability, and low cost process ability, which make it both functionally and economically attractive to a variety of end users and fabricators. Welding the S32003 alloy with 2209 weld wire produced an acceptable product, with corrosion resistance superior to that of the 2304 alloy in both the HAZ and the base metal. The S32003 alloy can be considered a lean version of the 2205 alloy with a substantially higher resistance to weld zone sensitization from the effects of sigma phase formation, and corrosion resistance generally better than 317L. The S32003 alloy can be considered an economical alternative to the higher alloyed 300 series stainless steels such as 316 and 317, due to its high strength, low life cycle cost and superior corrosion resistance.