|
Nickel, silver and platinum alloy. Platinum is a very tough metal, these springs were for I do not know what purpose, but I made 24 springs every April so I'm guessing spare parts I think for the SR 71 as I made parts for it every April and May (1980s). After I formed the springs I put four holes in each part and they went to heat treat. There were 6 bends and 2 hems with ridiculous tolerances for sheet metal. They were an inch wide and about one and a half inch long when finished.
|