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  1. ChrisOverh2o

    Materials substitution

    I have a requirement for a Siemens build (compressor piping) where they have indicated SA515 Gr 70 for a gusset detail on a small bore nozzle of SA 106B materials. I understand SA515 is coarse grain structure and SA516 is a finer grain structure. SA 515 may give slightly higher toughness at...

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