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AL-6XN components must be full solution annealed after welding to avoid intergranular corrosion. If annealing is impractical, a filler material must be used to "over alloy" the weld area. This can be achieved by using a filler metal with a higher molybdenum content of 9% or greater, placed between the two components being joined. See welding AL-6XN for a more complete discussion. For a comparison of the relative corrosion resistances of the different styles of weld insert rings, see the metallurgical evaluation report, "Analysis of Weld Insert Rings" on the corrosion studies page. |
CSI supplies the rings in two materials:
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