Actually, I did find the Paulello site while I was searching. Thanks for clarifying as I wasn't quite sure which wire most closely resembled Roslau--I didn't follow this entire thread. Part of the confusion that I have lies in the varied terminology: Breaking strain, tensile strength, practical breaking load, nominal breaking load, elastic limit, etc. Perhaps it would be helpful if each of these were defined and their mathematical relationship(s) clarified. It's not obvious to me where those come from or which one should pay the most attention to. I was also interested to read on Paulello's site that stressing a string close to its elastic limits gives the best balance between the fundamental frequency and the higher partials suggesting a curve emphasizing smoothness in BP% as a fundamental criteria. Not everyone agrees with that philosophy. I would be interested in comments from those who follow similar or different philosophies why they choose to emphasize certain criteria over others--if they wish to share. David Love www.davidlovepianos.com -------------------------------------------------------------------------- snip... I gave you the link to Paulello's site in an earlier message in this thread. His PDF tells the story pretty well. His 'M' wire is roughly equivalent in strength to Röslau. The values I use, so far a I remember, were from the old firm of Giese, since absorbed into Röslau. It seems pretty odd to me that neither Röslau nor Mapes give any guidance at their websites. snip... JD
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