What materials/alloys are used for excavator booms and sticks?

Hello All,



I am a mechanical designer who is new to the heavy equipment industry. My experience is in camera/lighting systems for the glass industry. I am trying to get up to speed as fast as possible so I don't have to ask so many questions and so that I can add value to my work.



I am looking for help understanding common materials used in various parts of excavators and similar equipment. If anyone could chime in on what alloys they are familiar with for various elements of heavy equipment, or let me know of some resources that they would recommend, that would be awesome.



Thanks!