Medium Grain Extruded Graphite Block
Consistent Density and Structure
Produced by the extrusion process, the blocks feature uniform grain distribution and reliable density, ensuring stable performance across applications.
Excellent Thermal and Electrical Conductivity
Provides efficient heat and current transfer, making it suitable for electrodes, furnace components, and conductive parts.
Good Machinability
Easy to process into rods, tubes, plates, and custom-shaped parts, allowing flexible use in diverse industries.
Durability in Harsh Conditions
Withstands thermal shock, molten metals, and chemical environments, maintaining long service life with minimal wear.
Versatile Industrial Applications
Commonly used in glass production, metallurgy, chemical processing, and heat treatment, where both cost-effectiveness and reliability are required.
Description
Medium Grain Extruded Graphite Block
Medium Grain Extruded Graphite Blocks are engineered for reliable performance in demanding industrial environments. Produced through the extrusion process, these blocks combine consistent density, strong conductivity, and excellent machinability, making them a versatile material choice for applications across glass, metallurgy, chemical processing, and heat treatment industries.
What Is Medium Grain Graphite ?
Medium grain graphite refers to synthetic graphite with a particle size typically between fine grain (<0.8 mm) and coarse grain (>2 mm). Compared with fine grain graphite, it has lower machining precision but better cost efficiency and higher thermal conductivity. Compared with coarse grain graphite, it provides finer structure, higher strength, and improved surface finish. This balance makes medium grain grades widely used in EDM electrodes, foundry molds, furnace fixtures, and glass industry tools. In essence, medium grain graphite offers an optimal compromise between machinability, durability, and cost, fitting applications that demand both strength and economy.
Key Features & Benefits
- High temperature resistance: Retains strength and integrity at extreme operating conditions.
- Thermal shock resistance: Maintains dimensional stability under rapid heating and cooling cycles
- Corrosion resistance: Resists chemical attack in harsh atmospheres, extending service life.
- Superior thermal conductivity: Promotes uniform heat distribution in furnaces, molds, and EDM setups.
- Machinability: Enables precise shaping into electrodes, plates, or rods without edge cracking.
These advantages make our material one of the leading performers in its category, balancing durability, process efficiency, and cost control.
Cylindrical vs. Block Medium-Grained Graphite
When choosing medium-grained graphite, the shape matters just as much as the grade. Cylindrical graphite rounds are a cost-effective option, commonly used for standard parts like electrodes, rods, and tubes, making them well-suited for continuous operation. Rectangular graphite blocks, on the other hand, offer larger sizes, higher density, and excellent flexibility for machining, which makes them ideal for molds, crucibles, trays, and heavy-duty components where strength and thermal shock resistance are critical. Unlike suppliers that only offer extruded rounds, SHJ Carbon provides both extruded rounds and vibration-molded blocks, giving customers the freedom to select the most suitable material for their applica
|
Dimension |
Cylinders (Graphite Rounds) |
Blocks (Graphite Rectangles) |
|
Forming Method |
Extruded |
Vibration Molded |
|
Structural Feature |
Strong axial properties, higher conductivity along the extrusion direction |
Near isotropic structure, uniform density and strength |
|
Typical Size |
φ200–φ600 mm, length customizable |
500×500×200 mm or larger, can be cut into pieces |
|
Machining Flexibility |
Ideal for rods, tubes, electrodes, stirring shafts (rotational parts) |
Can be cut into molds, crucibles, trays, saggars, large or complex parts |
|
Performance |
High thermal/electrical conductivity, cost-efficient |
Higher density, greater strength, better thermal shock and load resistance |
|
Typical Uses |
Electrodes, blowing pipes, stirring rods, conductive parts |
Molds, crucibles, heat treatment trays, casting molds, saggars |
|
Customer Recommendation |
✅ Best for standard-size conductive and heating components |
✅ Best for customized, large-size, or heavy-duty applications |
Technical Specifications
|
Grade |
MV-12 |
MV-13 |
MV-20 |
ME-11 |
|
|
Type of Forming |
Unit |
Vibro-molded |
Vibro-molded |
Vibro-molded |
Extruded |
|
Bulk Density |
g/cm³ |
1.72 |
1.73 |
1.65 |
1.73 |
|
Specific Resistance |
μΩ.m |
9 |
8.5 |
11 |
8 |
|
Compressive Strength |
MPa |
30 |
35 |
28 |
37 |
|
Flexural Strength |
MPa |
13 |
15 |
9 |
18 |
|
C.T.E (RT-600℃) |
10-6/℃ |
3.2 |
3.3 |
N/A |
2.4 |
|
Thermal Conductivity |
W/(m.k) |
100 |
130 |
N/A |
N/A |
|
Ash |
% |
0.2 |
0.12 |
0.25 |
0.2 |
|
Maximum Grain Size |
mm |
0.8 |
0.8 |
2 |
0.8 |
|
Regular Size |
Blocks: 500*500*(1800/1850), 650*(500/600)*(1800/1850/2200), 800*500*1850, 950*500*1850, 1100*400*2200, 1250*450*2200. |
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The above properties are typical values, not guaranteed, other specifications are available. |
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Applications for Medium Grain graphite
Metallurgy & Casting
Exposure to molten metal erosion (e.g., aluminum alloys) and intermittent thermal shock requires materials with low wettability and strong corrosion resistance.
Chemical & Electrolysis
Corrosive environments involving acids, alkalis, and molten salts, combined with medium-to-high temperature electrical conduction and heat exchange. Graphite heat exchanger blocks and tube sheets, anodes or cathodes for magnesium, manganese, and sodium electrolysis, and conductive/supporting components in electrolysis cells.
Lithium-Ion Batteries
Carbonization and graphitization of anode precursors require long heat treatment cycles, repeated high-temperature loading/unloading, and strong thermal shock resistance. Crucibles for anode carbonization, graphitization saggers and plates, loading frames/trays, furnace insulation linings.
Heat Treatment & Refractories
Processes often take place in vacuum or inert atmospheres, with repeated heating and cooling cycles between 800–2200 °C. Materials must show low dust generation and excellent resistance to thermal shock. Heating elements, conductive electrodes and connectors, loading trays/plates, muffle boxes, thermal field linings and supports, crucibles/material boxes, tooling, and molds.
Why Choose SHJ CARBON
Technology First
We offer a variety of transmission components
25+ Years of Industry Experience
Proven expertise in carbon and graphite insulation for high-tech manufacturing.
Trusted by Top Manufacturers
Long-term supplier to leading electronics, semiconductor, and solar PV companies.
Custom Engineering Support
Tailored designs in boards, cylinders, and complex 3D shapes to match exact specifications.
Advanced Production & Purification
Secondary high-temperature treatment up to 2800 °C for exceptional purity.
Customized Graphite Solutions
Beyond standard grades, SHJ CARBON develops customized graphite blocks tailored to client requirements. We adjust grade, density, and size according to application needs, whether for high-purity environments, specialized furnace designs, or large-format tooling. Every project receives engineering support and quality control documentation, ensuring confidence in both performance and delivery.
With SHJ CARBON, you gain more than a supplier-you gain a partner committed to optimizing your process performance with world-class graphite solutions.
Medium Grain Graphite – FAQ
A1: It is a synthetic graphite with particle size between fine and coarse grades. It offers balanced density, good machinability, and strong thermal performance.
A2: Medium grain graphite provides high thermal conductivity, thermal shock resistance, and oxidation resistance, making it reliable under harsh conditions.
A3: Industries use it for EDM electrodes, foundry molds, glass forming tools, furnace parts, and refractory applications.
A4: SHJ CARBON supplies graphite blocks, rods, and plates, plus customized grades and sizes for specific requirements.
A5: We offer stable quality, engineering support, and consistent delivery, backed by decades of graphite manufacturing experience.
Get in Touch – Request a Quote
Ready to enhance your thermal management systems with high-performance medium grain graphite ? Reach out today for expert advice, customized solutions, and fast delivery.
Contact Us Now or Request a Quote.
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