This is covered to some degree in:
Tylecote, R.F. and Gilmour, B.J.J., B.A.R.British Series 155: The Metallography of Early Ferrous Edge Tools and Edged Weapons (Oxford: B.A.R., 1986).
A relevant selection from page 251 of that work is shown below.
Page 252 is table (ex. Salin) on composition of Merovingian pattern-welded sword blades and gives Phosphorous contents between 0.14 and 0.35% but without localization.
|