Bronze or Steel Strings, for Wire Strung Harps
When I custom design a bronze or steel wire strung harp, I use gauges of wire that will give a good solid ringing tone, without excessive breakage. Bronze wire strings are Very fragile, since the Bronze is not tempered the way Steel is. Instead it`s structure is more crystalline, and more easily broken. Bronze strings are also quote susceptible to going out of tune with temperature changes.
Steel strings are sometimes preferred by some wire harp players, and so I have built a number steel strung wire harps over the years. Steel has a much more pronounced metal sound, and rings quite well, for a longer time. They are also stronger than Bronze, with much less breakage, since Steel is a tempered metal.
Markwood Heavenly Strings make all my custom harp strings, with the exception of my gut strings.