Yeah well...you can stamp a license plate or a fender, your foot.lol
Stamp forge vs die forging, one isn't as strong.. but now its splitting hairs.
"Plastic" had no dog in this was my arm poke .
But if you want to know that it's a red hot core twisted to its rough shape and machined the hell out of 'another reason for higher cost' check this out... An In-Depth Look at Crankshafts
You can read all of the articles in your spare time. I think the entire board needs to..even if just a refresher