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Qingdao Tennry Carbon Co., Ltd.
Qingdao Tennry Carbon Co., Ltd.
  • edm graphite blocks factory
  • edm graphite blocks suppliers
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  • edm graphite blocks manufacturers
  • edm graphite blocks wholesale suppliers

EDM Graphite Blocks

EDM graphite electrodes are critical for electrical discharge machining. Featuring low electrode wear, high material removal rate and excellent thermal stability, they deliver stable machining performance. Various graphite grades are offered for roughing and fine finishing. With good machinability, they can be processed into complex custom shapes. Boasting high-temperature resistance and low thermal expansion, they help shorten production cycles and improve workpiece surface quality for mold-making and metal processing.


Specifications of EDM Graphite Blocks


Index

Units

FSWH-5

FSWF-5

FSW-7

FSW-8

FSK-5S

FSK-7

FSK-8

FSK-9

Bulk density

≥g/cm3

1.68

1.78

1.85

1.91

1.85

1.83

1.86

1.9

Electric resistivity

μΩ.m

13

9-10

11-13

11-13

8-10

11-14

10-14

10-14

Compressive strength

Mpa

86

85

115

135

80

110

120

125

Flexural strength

Mpa

38

43

51

60

40

50

55

60

Shore hardness


51

56

65

70

55

67

72

75

Ash content/

purification

ppm

500/50

500/50

500/50

500/50

500/50

500/50

500/50

500/50

Average granularity

μm

14-15

14-15

8-10

8-10

15

8

6

2-4

Coefficient of thermal expansion

×10-6/℃

5

5.5

5.6

5.85

4.8

3.8

4

3.9

Young's modulus

Gpa

8.8

10.3

11

12

10

11

12

12


Products

Features of EDM Graphite Blocks

Ultra-High Processing Efficiency for Mass Production
Ultimate Thermal Stability with Zero Structural Deformation
Lightweight Design Reduces Equipment Loss
Self-Protection Performance & Ultra-Low Electrode Loss
Isotropic Structure for Uniform Discharge Performance
Features of EDM Graphite Blocks
Ultra-High Processing Efficiency for Mass Production

EDM graphite features superior CNC cutting and EDM performance. Its milling speed is 2–5 times faster than copper with burr-free finishing without secondary trimming. Its spark erosion efficiency is 2–3 times higher, greatly shortening mold roughing and finishing cycles and boosting productivity.


Features of EDM Graphite Blocks
Ultimate Thermal Stability with Zero Structural Deformation

As the core advantage of EDM graphite, it has a sublimation temperature of 3650℃ and a thermal expansion coefficient 1/30 of copper. Unlike copper (softening at 1000℃ and easy to deform under high discharge temperature), graphite maintains stable dimensions for thin walls, fine ribs, sharp corners and microstructures, ensuring high-precision mold processing.


Features of EDM Graphite Blocks
Lightweight Design Reduces Equipment Loss

With only 1/5 density of copper, graphite greatly reduces spindle load and machine wear when making large-size electrodes. It avoids clamping deformation and machine vibration, perfectly suitable for large-scale mold production.


Features of EDM Graphite Blocks
Self-Protection Performance & Ultra-Low Electrode Loss

During EDM processing, carbon molecules decomposed from spark oil form a dense protective film on the graphite surface. This self-compensation effect offsets discharge loss, realizes low/micro-loss machining, stabilizes precision and reduces electrode replacement and production costs.


Features of EDM Graphite Blocks
Isotropic Structure for Uniform Discharge Performance

High-end EDM graphite adopts isostatic pressing technology with uniform internal granular structure and no directional difference. It delivers consistent conductivity, wear resistance and discharge effect in all directions, avoiding uneven machining errors.


EDM Graphite Blocks Technology

  • Customized Processing and Technical Services. Leveraging advanced deep-processing technology for graphite, we offer high-precision custom sawing services. Based on customers' mold processing conditions, precision requirements, and equipment parameters, we precisely match the appropriate EDM graphite grade in terms of grain size, density, and hardness.

  • We can also precisely machine raw graphite blanks into any customized dimensions required by the customer. Our one-stop technical service includes material selection, precision cutting, and personalized customization, supporting all types of EDM graphite products and related process solutions.


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