An Austrian economist. Sorry for my quip and reply. I couldn’t help myself :)
Heeheeehee I was thinking I said Steel.
# “ A generally hard, strong, durable, malleable alloy of iron and carbon, usually containing between 0.2 and 1.5 percent carbon, often with other constituents such as manganese, chromium, nickel, molybdenum, copper, tungsten, cobalt, or silicon, depending on the desired alloy properties, and widely used as a structural material.”