Welding issues of super duplex steel SAF2507
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I recently encountered a project where a super duplex steel grade, SAF2507, is to be used in the pipeline system, and there are many joints that need to be welded. I was wondering if anyone has experience with similar welding tasks? What issues need to be considered during welding?
Reduce heat input and keep the temperature between passes below 100 degrees Celsius. It is best to use nickel-based welding materials. ER2594 ENiCrFe-3
Is welding this type of steel quite difficult? Since it is a duplex steel, does the welding area tend to undergo phase transformation during welding? Will this lead to a decrease in the corrosion resistance of the welded area? Since many welds are welded on-site, it is likely difficult to carry out heat treatment there.
I’ve never encountered this material either. . So I can’t give you any more advice.
Could someone please share the relevant specifications or instructions for super duplex steel?