Lets start at the beginning.
http://www.chemicalelements.com/ Periodoc Table
http://www.sv.vt.edu/classes/MSE2094_NoteBook/96ClassProj/examples/kimcon.html ~~ An Iron Diagram
http://www.sv.vt.edu/classes/MSE2094_NoteBook/96ClassProj/gloss.html#eutectoid ~~ Terms Glossary
http://www.machinist.org/army_welding/Ch7.htm ~~ Metals Identification