Pulp and Paper Chimney application

I'm designing a new chimney for a Pulp and Paper Plant and I need an advice about which would be the best steel to be used in this
situation.
The gas temperature is around 180 ºC [a little bit below the dewpoint] and it has high concetration of SO3 so high corrosion is foreseen.
I need a better alternative to CORTEN-B material but without increasing too much the final cost.
I'm using AISI 316Ti in top 6 m because the temperature is lower there and higher corrosion might be foreseen.
I would like to have a kind of list from acid chemical attack point of view [considering also the price range].
Best regards,
George
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You could try 3Cr12 material. Try seeking advice from a manufacturer for details of its uses.
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