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  1. anne_pe

    Incorrect passivation type for 17-4 PH

    I have castings of 17-4 PH CRES that were passivated per AMS2700 Type 6 instead of Type 2. Could this cause any damage to the parts? Would it be okay to re-passivate per Type 2?
  2. anne_pe

    4130 Question

    4130 steel per AMS-S-6758: Condition D2 => D=normalized, 2=pickled or blast cleaned Condition D4 => D=normalized, 4=cold finished (drawn) Is condition D4 a stronger material because its cold worked? Or are the mechanical properties the same and the surface condition of the "4" is as-drawn...

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