Dear Chakster, I was reading a very interesting white paper on static electricity and vinyl reproduction, published by Shure in 1978, when I came across this very interesting comment on the use of exotic metals in cantilever construction. Of course, Shure is here defending their own choice of using a "special" alloy of aluminum in what was then their latest flagship cartridge, the V15 Type IV. I think you can consult the referenced article at the bottom, if you want to see some data in support of what they wrote here:
"What material is used to make the shank? Why? Why not use Beryllium or Boron, etc.?
Answer:
Normally it is not our policy to divulge the material and proprietary processes that are used to fabricate our products. In this case, however, a departure from that policy is warranted, because of the great deal of confusion that seems to exist in the marketplace as to the pros and cons of certain exotic materials, such as Beryllium, Boron, Titanium, etc. It seems that by the sheer sound of these exotic and strange names, tremendous performance advantages are implied. Since these materials were developed for space age applications, it is easy to understand that there is a connotation of super strength and other advantages.
Shure has made use of and studied a variety of these materials for quite a while. In the early days, Beryllium Copper was used, then Magnesium, Aluminum, and special Aluminum alloys. Aluminum and Beryllium combinations were used for example, in the V15 Type II stylus as early as 1967. A special heat treated Aluminum alloy is used in the V15 Type IV telescopic stylus assembly. This coupled with its shape and structure determines the performance criteria."
The method of analysis is outlined in L. Happ’s paper, "Design Considerations of the V15 Type IV Phonograph Stylus."
"What material is used to make the shank? Why? Why not use Beryllium or Boron, etc.?
Answer:
Normally it is not our policy to divulge the material and proprietary processes that are used to fabricate our products. In this case, however, a departure from that policy is warranted, because of the great deal of confusion that seems to exist in the marketplace as to the pros and cons of certain exotic materials, such as Beryllium, Boron, Titanium, etc. It seems that by the sheer sound of these exotic and strange names, tremendous performance advantages are implied. Since these materials were developed for space age applications, it is easy to understand that there is a connotation of super strength and other advantages.
Shure has made use of and studied a variety of these materials for quite a while. In the early days, Beryllium Copper was used, then Magnesium, Aluminum, and special Aluminum alloys. Aluminum and Beryllium combinations were used for example, in the V15 Type II stylus as early as 1967. A special heat treated Aluminum alloy is used in the V15 Type IV telescopic stylus assembly. This coupled with its shape and structure determines the performance criteria."
The method of analysis is outlined in L. Happ’s paper, "Design Considerations of the V15 Type IV Phonograph Stylus."