I don't know specifically about Reynolds but a number of tubeset stays are made from a different material than the main tubes. The important thing is not the material, it's the physical characteristics like size and shape. For example, Dedacciai Zero main tubes are heat treated to a minimum of 165 ksi but the stays are 65 ksi. I don't think there is much of any advantage of using super high strength steel in stays since a lower strength metal is strong enough for the job and the physical size of the stays is the defining feature, not the material. The exception to this may be some super thin stays (which are uncommon.)
Last edited by Nessism; 05-16-20 at 07:10 AM.