The preferred way to achieve the correct profile for correct fit-up is by a method such a machining or water-jet cutting which will not work harden the edge the way that shearing will.
Sheared edges should be ground back before welding to eliminate the work hardened area.
Water-jet cutting is the best method for Hastelloy C276/UNS N10276 Edge preparation.
It would minimize the cost loss of noble alloy C276 and no do damage to the material.
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