____ is very well suited for making welds on steel, steel alloys (including stainless), nickel alloys, and most other metals other than aluminum or magnesium.

• A. Thoriated tungsten
• B. Cerium tungsten
• C. Lanthanum tungsten
• D. Zirconium tungsten

Answer: (B)

Understanding tungsten electrode choice is about arc stability and which metals you can weld with DC or AC. Cerium oxide doped tungsten (cerium tungsten) is valued for its stability and easy arc starting across a wide range of metals, especially ferrous alloys like carbon steel, stainless steel, and nickel alloys. This broad compatibility means it performs well on steel, stainless, and nickel-based welds, making it a versatile general-purpose option for those materials.

Aluminum and magnesium, however, are typically welded with AC to continually clean the oxide layer on aluminum during the arc. For those metals, other tungsten types (like pure or zirconated/lanthanated tungstens) often offer better AC performance and arc behavior. So cerium tungsten fits the description of being very well suited for steel, stainless, and nickel alloys, while not being the preferred choice for aluminum or magnesium.