1960 Ford Allegheny Ludlum Stainless Steel Bodied Thunderbird Press Photo. Original. Allegheny Ludlum, now ATI (Allegheny Technologies, Inc.), made the stainless steel body for this 1960 Ford Thunderbird. They made several stainless steel bodied cars over the years. Starting with Ford Model A's. Then some 1936 Ford coupes, which you can see one posted on the site, as well as this 1960 Ford Thunderbird. It is said that some of these were used as company cars by Allegheny Ludlum salesmen.