Molybdenum Boat Molybdenum Box Molybdenum Tray Grade: Pure Molybdenum and TZM Molybdenum alloy. Specification: (20-500) x (20-500) x (20-500) L, (0.5-5.0mm) thk or according to the drawings from the customers. Application: Molybdenum boxes are elaborately made of molybdenum plates with high quality, mainly used for sintering and annealing of both Metal and Nonmetal Materials in Reduction Atmosphere, and also as Sintering Boat for powder products, such as sintering precision ceramics.