ASTM E1417 Method D: Strong Choice for Critical Parts

Summary for astm e1417 method d Discussion

Penetrant inspection per ASTM E1417 is the focus of this thread, where Tom Crescenzo asks whether method B or method D is better for critical aerospace machine parts. The only answer in the excerpt comes from Eric Purrington, who says he is not an expert but notes that at his previous employer all critical engine components were tested with Type I, method D, sensitivity level 3 or 4 because of customer requirements. His comment suggests method D was the chosen practice for those parts, but it is presented as an example of prior shop/customer requirements rather than a universal rule. The thread does not provide a direct comparison of method B versus method D, so the safest takeaway is that the appropriate method depends on the applicable specification and customer requirements for the part.