Fine-grained graphite blocks serve as industrial stock materials for machining into custom components, industrial tooling, molds, and specialized mechanical parts. Material selection depends on bulk density, maximum particle size, mechanical strength, porosity, electrical resistivity, and the specific operating environment of the finished component.
Fine-grained graphite materials are available in TSK and GSK grades, each featuring distinct physical and mechanical property profiles. Grade selection must align with component geometry, machining requirements, and service conditions.
Technical Specifications
|
Property |
TSK Grade |
GSK Grade |
|
Bulk Density (g/cm³) |
>= 1.70 |
>= 1.72 – 1.78* |
|
Maximum Particle Size (mm) |
<= 2.0 |
<= 0.8 |
|
Electrical Resistivity (micro-ohm meter) |
<= 15 |
<= 8.5 |
|
Flexural Strength (MPa) |
>= 13 |
>= 15 |
|
Compressive Strength (MPa) |
>= 28 |
>= 35 |
|
Open Porosity (%) |
<= 24 |
<= 20 |
|
Ash Content (%) |
<= 0.3 |
<= 0.3 |
Material Characteristics & Application Alignment
Choosing the right fine-grained graphite block requires evaluating performance data against your operational demands:
Particle Size & Machinability: Finer particle structures (such as GSK) allow for better edge integrity, tighter fine features, and superior surface finish during precision milling or EDM shaping.
Mechanical Strength: Flexural and compressive strengths dictate how well the block withstands structural loads in fixtures, furnace furniture, or mechanical components.
Porosity & Permeability: Lower open porosity helps reduce fluid penetration and is critical if the application requires subsequent impregnation or strict chemical resistance.
Electrical & Thermal Properties: Low electrical resistivity is essential for current-carrying parts and electrical discharge machining.
Manufacturing, Machining & Supply Capabilities
Varying industrial requirements are supported from raw material distribution to semi-finished processing:
Raw Stock Sourcing
Supplied in standard block dimensions or cut-to-size blanks to minimize material waste during your in-house machining.
Custom Machining Services
Capable of processing blocks into plates, bars, custom inserts, and EDM electrode blanks according to your CAD drawings and dimensional tolerances.
Batch Consistency & Quality Verification
Each production batch undergoes rigorous inspection covering density, strength, and dimensional accuracy to ensure reliable repeatability.
Packaging, Storage & Handling Guidelines
Packaging Standards
To prevent edge chipping, moisture absorption, and surface contamination during international shipping, fine-grained graphite blocks are secured using industrial packing methods:
Export-Grade Wooden Crates: Fully enclosed fumigated wooden crates or pallets configured to protect heavy blocks from impact during transit.
Moisture Protection: Internal plastic wrapping or shrink-wrap containment to shield blocks from humidity and environmental exposure.
Cushioning & Separation: Foam padding or corrugated dividers placed between individual blocks to prevent shifting and surface abrasion.
Storage & Handling Recommendations
Indoor Storage: Store blocks in a dry, covered environment protected from direct rain, snow, and standing water.
Elevation: Keep pallets elevated off concrete floors using wooden dunnage to prevent moisture absorption through the base.
Mechanical Handling: Use proper lifting equipment and nylon straps or padded forks when moving heavy blocks. Avoid point-load impacts on corners and edges to prevent chipping or micro-cracking.
FAQ
Q: What is the difference between TSK and GSK graphite grades?
A: TSK and GSK feature different maximum particle sizes, density ranges, electrical resistivity, and mechanical strengths. GSK typically offers a smaller maximum particle size and lower electrical resistivity, making it more suitable for applications requiring tighter machining details or finer surface finish. Selection should be based on your specific engineering requirements.
Q: Can fine-grained graphite blocks be supplied in custom dimensions?
A: Yes. Blocks can be provided in standard stock sizes, cut-to-size blanks, or machined down to custom dimensions based on your technical drawings and dimensional tolerances.
Q: Are material test reports (MTR) or certificates of analysis provided with shipments?
A: Material certificates and inspection records can be provided upon request. Specific testing requirements, such as density verification, strength testing, or batch traceability, should be agreed upon prior to order confirmation.
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