Agreed, drop a little more carbon into the steel and you've got your own new stainless steel that for all intensive purposes is probably identical to 3,000 type

Agreed, drop a little more carbon into the steel and you've got your own new stainless steel that for all intensive purposes is probably identical to 3,000 types of steel already on the market by different producers globally. Steel is steel, they probably researched the steel that works best as an antenna whilst not compromising the physical strength of the unit (for instance, you don't want the metal case to be the thing most likely to shatter on the device).