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  • Users: mridey
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  1. mridey

    Welding over Manganese Phosphate

    One of our suppliers is having problems seal welding a valve body joint where the parts have been manganese phosphate coated. Base material is cast steel (WCB). Welds are not always so good, and don't seal. I've read where welding over Mn-Phos is no big deal, and just the opposite. I'm...

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