What are the two main chemical components of a welding rod?

• A. Iron and cellulose
• B. Iron and chromium
• C. Carbon and silicon
• D. Nickel and copper

Answer: (A)

A welding rod is made of a metal core and a flux coating. The core provides the filler metal that becomes part of the weld, and for most basic rods that core is iron. The coating around the core is a flux that protects the weld and helps control its chemistry; in many rods the binder in this coating is cellulose. So the two main components you can identify are iron (the core) and cellulose (a common binder in the flux coating). The other options point to alloying elements that may be present in some steels or specialized rods, but they are not the primary constituents of a typical welding rod’s core and flux coating.