Melting & Casting Refractory
Silicon Carbide
Graphite Crucible
The Silicon Carbide Graphite Crucible is a premium composite refractory vessel engineered for high-temperature metal melting, alloying, and casting operations. Combining the exceptional thermal conductivity and lubricity of graphite with the oxidation resistance and mechanical strength of silicon carbide, this crucible delivers outstanding service life, rapid heat transfer, and reliable performance across ferrous and non-ferrous melting applications.
g/cm3 bulk density
Apparent Porosity
Min Service Temp
Composite Matrix
Technical Details
Product Information
| Parameter | Standard Value | Tested Value | Notes |
|---|---|---|---|
| Refractoriness | ≥ 1630°C | ≥ 1650°C | High-temperature structural stability |
| Carbon Content | 30% ~ 45% | ≥ 40% | Natural flake graphite matrix |
| SiC Content | ≥ 45% | 50% ~ 60% | Silicon carbide bonding phase |
| Apparent Porosity | ≤ 12% | ≤ 10% | Dense structure for metal tightness |
| Bulk Density | 2.2 ~ 2.3 g/cm³ | ≥ 2.25 g/cm³ | High density for structural durability |
| Maximum Service Temperature | 1700°C | — | Inert or reducing atmosphere |
| Standard Sizes | A-type, B-type, T-type; Custom | — | OEM dimensions available on request |
Silicon Carbide Graphite Crucibles are the preferred melting vessel for foundries, refineries, and research laboratories requiring precise temperature control, melt purity, and long service life across a broad spectrum of metals and alloys.
Precious Metal Melting & Refining
Gold, silver, platinum, and palladium melting in jewelry manufacturing, bullion refining, and electronics recovery where melt purity and minimal contamination are paramount.
Copper & Copper Alloy Foundries
Melting and casting of copper, brass, and bronze alloys in induction and resistance furnaces where thermal efficiency and resistance to copper slag attack are critical for productivity.
Aluminum & Aluminum Alloy Casting
Aluminum die casting, gravity casting, and alloy preparation in automotive and aerospace component manufacturing where consistent melt temperature and low iron pickup are essential quality requirements.
Zinc, Lead & Low-Melting Alloys
Die casting and hot-dip galvanizing operations melting zinc, lead, tin, and their alloys, where crucible chemical inertness and dimensional stability under continuous thermal cycling are decisive factors.
Industries Served
Technology
How It Works
The Silicon Carbide Graphite Crucible achieves its superior performance through a carefully engineered multi-phase composite structure that unites the thermal properties of graphite with the chemical durability of silicon carbide.
Raw Material Selection
High-purity natural flake graphite and premium-grade silicon carbide powders are carefully selected and graded to achieve the optimal particle size distribution for maximum density and conductivity.
Mixing & Isostatic Pressing
The blended graphite-SiC mixture is combined with specialized binders and formed under isostatic or mechanical pressing to produce a dense, homogeneous green body with uniform wall thickness.
Controlled Firing & Glazing
Firing in a controlled atmosphere at high temperature bonds the SiC and graphite phases. A proprietary glaze coating is applied to the outer surface to provide additional oxidation resistance and mechanical protection.
Quality-Certified Output
Each crucible undergoes rigorous dimensional, physical, and chemical testing -- including porosity, bulk density, and thermal conductivity verification -- before dispatch to ensure consistent performance in your application.
Get In Touch
Request a
Quote Today
Whether you require standard crucible sizes or fully customized Silicon Carbide Graphite Crucibles for your specific furnace and metal type, our engineering team is ready to assist. Submit your requirements and we'll respond within one business day.