How can you weld duplex stainless steels and ensure that the weld joint retains equivalent properties?
The duplex stainless steels have typically 50% ferrite and 50% austenitic structures, allowing strength and corrosion resistance. To ensure that the weld has comparable properties, filler metals with overmatching chemistries (higher nitrogen, nickel and molybdenum) are selected to ensure the phases are balanced in the final weld structure. In somne cases, higher alloyed austenitc welding products are used to ensure that the duplex stainless steel welds have comparable or better corrosion resistance than the base metals.
Related Questions
- How do the properties of duplex stainless steels affect wall thickness, thermal expansion, and heat transfer in comparison to austenitic stainless steels?
- How can you weld duplex stainless steels and ensure that the weld joint retains equivalent properties?
- what are the dominant properties of austenitic stainless steels?
