Quote..
Steels are generally 66% heavier than aluminum but specific strength, the ratio of strength to density, is the property of interest for aircraft designers. Of the five materials, 440C stainless steel has the highest specific strength, followed by 4130 alloy steel, 7075-T6 aluminum, and 2024-T3 aluminum. AISI 304 stainless steel has the lowest strength-to-weight ratio of the five.
Sorry i did mean to say high grade stainless but i rushed that post as i was on the bog
*just a quick edit. Neon trials never said 304 or 316, scotty did. neon trials also went on to say £250-300 dependant on material