With the price of molybdenum mill products at record highs, ODS superalloys are now a viable alternative in vacuum furnace hot-zone construction, offering performance advantages over molybdenum and molybdenum alloys.
Molybdenum is the most widely used refractory metal in vacuum furnaces hot zone construction. Unfortunately, recent dramatic increases in the price of commodity molybdenum oxide (the precursor material to produce pure molybdenum and Mo alloys such as TZM and ML Molys) have forced producers of molybdenum mill products to raise prices markedly over what the material was selling for as little as one year ago. This situation has made oxide dispersion strengthened (ODS) superalloys, such as PM 2000, once too costly for consideration, viable alternative materials. Additionally, in many applications, PM 2000 offers some distinct performance advantages over molybdenum.