Precision Graphite Block and Rectangular Block for Sintering and Machining
Product Overview
Our precision graphite blocks are high-quality isostatic and molded graphite billets available in a wide range of standard and custom sizes. These rectangular graphite blocks serve as raw material for machining EDM electrodes, sintering trays, furnace fixtures, jigs, and custom graphite components. Each block is precision sawed and surface-planed to provide flat, dimensionally accurate stock ready for CNC machining. We supply blocks in densities from 1.65 to 1.88 g/cm³ to match general-purpose, high-strength, and ultra-high-purity applications.
Graphite blocks are the starting point for nearly all custom graphite components. At Jincheng Graphite, we maintain an extensive inventory of standard block sizes and can also supply custom-sawn blocks cut from large isostatic graphite blocks up to 600 × 600 × 400 mm. Whether you need raw block stock for your own machine shop or fully machined finished components, we can supply the right graphite block at competitive prices.
Key Features
- Multiple material grades - molded, extruded, and isostatic graphite blocks
- Precision sawed surfaces - flat and square, ready for CNC machining
- Wide size range - from small 50×50 mm blocks to large 600×600 mm billets
- Certified material properties - density, hardness, and resistivity tested per batch
- Excellent machinability - machines cleanly with standard carbide cutting tools
- Custom thickness and dimensions - sawn to your exact specifications
- High purity options - ultra-pure grades available for semiconductor and vacuum applications
- Volume supply - reliable block supply for EDM and graphite component manufacturers
Technical Specifications
| Parameter | Value |
|---|---|
| Material Types | Molded, extruded, isostatic graphite |
| Bulk Density | 1.65 - 1.88 g/cm³ (grade-dependent) |
| Standard Sizes | 100×100, 200×200, 300×300, 400×400, 500×400 mm |
| Thickness Range | 10 - 300 mm |
| Max Block Size | 600 × 600 × 400 mm |
| Shore Hardness | 50 - 75 HS |
| Flexural Strength | 30 - 65 MPa |
| Electrical Resistivity | 10 - 20 µΩ·m |
| Cutting Tolerance | ±0.5 mm |
| Surface Planeness | < 0.2 mm per 300 mm |
| Ash Content | < 500 ppm (ultra-pure grade < 50 ppm) |
| Max Temperature | 3000°C (vacuum/inert) |
Applications
- EDM electrode stock - raw blocks for CNC machining EDM electrodes
- Sintering trays and setters - blocks machined into ceramic and powder metallurgy sintering fixtures
- Furnace furniture - blocks machined into hearth plates, support slabs, and jigs
- Die and mold manufacturing - graphite blocks for hot pressing and sintering dies
- Chemical processing - blocks machined into heat exchangers, baffles, and reaction vessels
- Research and development - custom-machined blocks for laboratory furnace fixtures
Why Choose Jincheng Graphite?
- Large block inventory - standard sizes in stock for fast shipment
- Multiple grades available - from economical molded to ultra-fine isostatic
- Precision sawing - custom-cut blocks to your exact dimensions
- Material certification - mill test reports available on request
- Competitive block pricing - direct from our graphite processing factory
- Machining service - we can also machine blocks into finished components per drawings
- Consistent supply - reliable volume supply for manufacturers
- Export worldwide - packaging suitable for international freight
FAQ
Q: Can you cut blocks to my custom dimensions?
A: Yes. We precision-saw graphite blocks to your specified length, width, and thickness with a tolerance of ±0.5 mm. Send us your required dimensions and grade, and we will quote custom-cut blocks.
Q: What is the largest block size you can supply?
A: We can supply isostatic graphite blocks up to approximately 600 × 600 × 400 mm. For larger components, we can fabricate assembled structures from multiple bonded or mechanically joined graphite blocks.
Q: Should I buy raw blocks or finished machined parts?
A: If you have CNC machining capability, raw blocks are the most economical option. If you need finished parts, we can machine complete components from drawings, typically saving you machining time and tooling costs.
Q: Do you offer ultra-pure graphite blocks for semiconductor applications?
A: Yes. We supply ultra-high-purity isostatic graphite blocks with ash content below 50 ppm, specifically for semiconductor, vacuum furnace, and high-purity vacuum applications where contamination must be minimized.
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