Al,
I concur with your assessment about the book.
I'll tell the old boss that I really need this spec to keep an eye on the test lab. You have to watch those guys sometimes. Had a few coupons this week where they missed the UT testing on our GMAW-S plates per TP-248. Although, I'm sure you don't really see to many GMAW-S tests per NAVSEA anymore. Anyway, thanks a bunch for the formula. 20% puts it right at 1.5" dia which is what the lab specified so your memory serves you well. I think 70/30 CuNi was at 30% and 304L SS was like 55%.
Thanks again,
R.J.C.