Graphite crucibles are highly heat-resistant containers used in metallurgical, foundry, and laboratory applications for melting and casting metals or other high-temperature materials. The unique properties of graphite make these crucibles suitable for extreme temperatures, as they can withstand very high thermal loads without degrading or breaking down. Key Temperature Range â?? Maximum Operating Temperature: Graphite crucibles can typically withstand temperatures up to 2,900�°C (5,252�°F). This makes them ideal for melting metals with high melting points like p, copper, and iron. Minimum Temperature: There is no specific minimum temperature for graphite crucibles. However, they perform best at high temperatures and are not typically used at low temperatures.