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  1. Randy59

    Rusting found on 303 S/S Fastener, Passivated and Black Oxide

    To all and sundry: Has anybody found that they have had corrosion difficulties with stainless steel fasteners (303) that have been passivated and then coated using black oxide. We have found that rusting (red corrosion) starts on the machined aspects of the fastener at about 48 hours. We have...
  2. Randy59

    Chemical Composition of in-house Stainless Steel Fastener

    I am looking for third party verification of the composition of a Stainless Steel stand-off. I will list below the major components and would appreciate any one that could verify if it is so and what variant of stainless steel it would be: a). C - 0.04%; b). Si - 0.47%; c). Mn - 1.74%; d)...
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