There are many precautions that need to be considered when welding duplex stainless steels. One of the biggest concerns is ensuring a proper ferrite to austenite phase balance. Several aspects will affect the phase balance of the weld metal and heat affected zone (HAZ) of a duplex stainless-steel weldment. Some items of extreme importance to consider are the filler metal composition, thermal cycle during welding, and welding technique.
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