http://www.aksteel.com/pdf/markets_p...Data_Sheet.pdf
^^ data sheet from an american steel company. You could start learning there.
I assure you, when I get home I will be taking off one of my headers to shut some people up. I'll drag it to the lab and bring back to the forum a full report on it. It will be way the **** over your heads and you will still be speaking sheepish, but I'll be able to point to it each time someone says something ignorant.