What Metals Can You Melt in a Graphite Crucible?

Graphite crucibles are commonly used in metallurgy and foundry applications for melting metals due to their high temperature resistance, thermal conductivity, and chemical inertness.

 

Graphite crucibles are commonly used in metallurgy and foundry applications for melting metals due to their high temperature resistance, thermal conductivity, and chemical inertness. Please contact us can withstand extreme temperatures without melting or reacting with most metals, making them suitable for melting a wide range of metals, including:

 

Aluminum: Graphite crucibles are commonly used for melting aluminum and its alloys in various foundry and casting operations. Aluminum has a relatively low melting point (approximately 660°C or 1220°F), well within the temperature range that graphite crucibles can withstand.

 

Copper: Copper and its alloys, such as bronze and brass, can also be melted in graphite crucibles. Copper has a higher melting point compared to aluminum (approximately 1085°C or 1985°F), but graphite crucibles are capable of withstanding the temperatures required for copper melting.

 

Ultra High Power Graphite Crucible

 

Gold and Silver: Graphite crucibles are frequently used for melting precious metals like gold and silver in jewelry making, refining, and investment casting applications. Both gold and silver have relatively high melting points (1064°C or 1947°F for gold, and 961°C or 1761°F for silver), but graphite crucibles can handle the temperatures necessary for melting these metals.

 

Iron and Steel: While graphite crucibles can withstand the temperatures required for melting iron and steel, they are less commonly used for these metals due to their higher melting points and other considerations. Iron melts at approximately 1538°C (2800°F), while steel melts at temperatures ranging from 1370°C to 1510°C (2500°F to 2750°F), depending on the alloy composition.

 

Lead and Tin: Graphite crucibles are suitable for melting low-melting-point metals such as lead and tin. Lead melts at a relatively low temperature of 327.5°C (621.5°F), while tin melts at 231.9°C (449.4°F), well within the capabilities of graphite crucibles.

Graphite (Regenerated) Crucibles

Zinc: Zinc and its alloys can also be melted in graphite crucibles. Zinc has a melting point of approximately 419.5°C (787.1°F), making it compatible with graphite crucibles.

 

In addition to the metals listed above, graphite crucibles can also be used for melting other metals and alloys with melting points within the temperature range that graphite can withstand. However, it's important to consider factors such as crucible size, thermal shock resistance, and compatibility with specific alloys when selecting a crucible for melting operations. Proper handling and maintenance of graphite crucibles are essential to ensure their longevity and performance in metallurgical processes.

 

We sell graphite crucibles in different sizes, the diameters of crucibles are 508mm/550mm/580mm/600mm etc. Welcome to contact us!