Graphite Blocks for Casting

Main application forms
Graphite molds: Used for precision casting and lost-wax casting, as mold cavities
Graphite cold runners: Replace metal cold runners to achieve local rapid cooling of the castings
Graphite crucibles: Metal melting containers, especially suitable for high-temperature alloys
Graphite cores: Form the complex internal structures of the castings
Graphite risers: Thermal insulation and secondary pouring, reducing casting shrinkage cavities and porosity
Graphite electrodes: Conductive components used in electric arc furnaces for melting

Core performance features
1. Outstanding high-temperature resistance
Melting point approximately 3850℃, boiling point nearly 4250℃. Can operate continuously in an environment of 2000℃+ under inert atmosphere
Far exceeding that of ordinary refractory materials (such as alumina with a limit of about 1800℃), suitable for the melting of special alloys
2. Excellent thermal conductivity and thermal stability
Thermal conductivity 120-200 W/(m·K) (at 100℃), 3-5 times that of ordinary cast iron
Extremely low thermal expansion coefficient (3-5×10⁻⁶/℃, -600℃), prone to cracking under rapid temperature changes
Moderate heat capacity, capable of quickly reaching thermal equilibrium and achieving a gentle and continuous chilling effect
3. Chemical stability and anti-sticking properties
Does not react chemically with non-ferrous metal liquids such as aluminum, copper, and nickel at high temperatures, avoiding casting contamination
Smooth and dense surface, does not stick to metal liquids, reducing defects such as sand sticking and burrs in the castings
Resistant to acid and alkali corrosion, suitable for various casting atmospheres (air, vacuum, protective gas)