Graphite Crucible Melting Metal

Graphite Crucible
Graphite crucibles are widely used in the smelting of precious metals and the smelting of non-ferrous metals and their alloys in
metallurgy, foundry, machinery, chemical and other industrial areas because of their superior properties. And has a good technical
and economic effects.Graphite crucible has more sizes, and not restricted to the production scale, quantity and smelting materials, it can be produced to any size, any quantity, and can ensure the purity of the smelting materials.

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Specification of Graphite Crucible Melting Metal

Graphite Crucible: A Must-Have for High-Temperature Applications

Graphite crucibles are indispensable tools in various high-temperature processes. From metal casting to scientific experiments, they offer unmatched durability and heat resistance. In this article, we’ll explore why graphite crucibles are a top choice for professionals across industries and how they stand out in terms of performance, cost-effectiveness, and reliability.

What is a Graphite Crucible?

A graphite crucible is a container made from graphite, designed to withstand extremely high temperatures. Crucibles are used in many industries for melting and processing metals, alloys, and other materials. The key benefit of graphite as a material is its ability to handle temperatures that would damage other substances, making it ideal for applications that involve intense heat.

Advantages of Using Graphite Crucibles

High Heat Resistance

One of the primary reasons graphite crucibles are preferred in high-temperature applications is their remarkable heat resistance. They can withstand temperatures of up to 3000°C (5432°F) without breaking down. This makes them perfect for use in furnaces, induction melting, and casting.

Excellent Thermal Conductivity

Graphite is an excellent conductor of heat, allowing for even and efficient heat distribution during the melting process. This property ensures that materials are melted uniformly, reducing the risk of impurities or imperfections in the final product.

Durability and Longevity

Graphite crucibles are known for their longevity. With proper care, they can last much longer than other materials. Their resistance to oxidation and thermal shock means they can be reused for a significant number of cycles before requiring replacement.

Low Expansion Rate

Graphite has a low coefficient of thermal expansion, meaning it doesn’t expand or contract drastically when subjected to high temperatures. This quality helps prevent cracking and damage during rapid heating or cooling.

Item	Unit	Guarantee value	Guarantee value
Max grain size	mm	0.8	0.8
Bulk density	g/cm3	≥1.70	≥1.73
Specific resistance	μΩ.m	≤8.5	≤8.0
Bending strength	MPa	≥10.0	≥12.0
Compressive strength	MPa	≥24.0	≥31.0
Thermal Condcutivity	W/(m.k)	≥120	≥130
C.T.E.(100-600) °C	10-6/°C	≤2.5	≤2.5
Ash content	%	≤0.3	≤0.3

High pure graphite

Item	Unit	baked twice	baked three time	baked four time
Item	Unit	impregnated once	impregnated twice	Impregnated three times
grain size	mm	≤325mesh	≤325mesh	≤325mesh
Bulk density	g/cm3	≥1.68	≥1.78	≥1.85
Specific resistance	μΩ.m	≤14	≤14	≤13
Bending strength	MPa	≥25	≥40	≥45
Compressive strength	MPa	≥50	≥60	≥65
Ash content	%	≤0.15	≤0.1	≤0.05

Item	Unit	Isostatic graphite
grain size	μm	5-22
Bulk density	g/cm3	1.75-1.85
Specific resistance	μΩ.m	10-15
Bending strength	MPa	≥40
Compressive strength	MPa	≥70
Shore hardness		≥5
Shore hardness		≥5
C.T.E.(100-600) °C	10-6/°C	3.2-5.2
Modulus of elasticity	GPa	9.5-12.5

Conclusion

Graphite crucibles are indispensable in a range of industries, from metal casting to scientific research. Their ability to withstand extreme temperatures, combined with their durability and cost-effectiveness, makes them a top choice for professionals seeking reliable and efficient heat-resistant solutions. By understanding the advantages, applications, and maintenance of graphite crucibles, you can ensure optimal performance in your high-temperature processes.

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Graphite Crucible