EDM / Spark Erosion

Coidan Graphite Products represent Ibiden Graphite BV for their range of high end isostatic graphite products, Ibiden grades of graphite can easily be identified by their outstanding high temperature resistance, high purity and low gas-emissions qualities. IBIDEN, in response to a wide variety of industrial needs, is in the business of supplying a whole range of materials that put these superior qualities to work, from general use lubricants to the most technologically advanced products.

Unique Graphite Features

• Thermally stable
  Graphite can be used at 3000°C in inert atmosphere, has high thermal shock resistance and increased strength at elevated temperatures.
  
• Chemically stable
  Carbon and Graphite have good corrosion resistance, it can be used in most acid/alkaline environments.
  
• Electrical and Thermal Conductor
  Graphite has good electrical and thermal conductivity.
  
• Low expansion coefficient:
  Thermal expansion coefficient is low, dimensional stability at high temperatures is high and strength is not significantly reduced up to 2000°C.
  
• Light weight:
  The true density of single crystal graphite is 2.26, but the apparent density is around 1.60 – 1.90 since regular graphite is around 15-30% porous
  
• Lubricating ability:
  Due to soft molecular structure, lubricating property is great, enabling greaseless use at high and low temperatures. 

Ibiden Graphite Grades

Medium Grades

GRAPHITE GRADE EX50
Properties	Units	Values
Apparent Density	g/cc	1.75
Typical Grain Size	mm	0.015
Hardness	Shore	55
Breaking Strength Flexural	MPa Kg/cm²	63.7 650
Specific Resistance	Ωm x 10-6	12.5
Surface Finish	VDI	36 ~ 27
Maximum block size	mm	300 x 600 x 1200

GRAPHITE GRADE ED-3
Properties	Units	Values
Apparent Density	g/cc	1.80
Typical Grain Size	mm	0.010
Hardness	Shore	65
Breaking Strength Flexural	MPa Kg/cm²	58.8 600
Specific Resistance	Ωm x 10-6	14
Surface Finish	VDI Ra	33 ~ 27 4.5 ~ 2.24
Maximum block size	mm	250 x 460 x 1020

High Grades

GRAPHITE GRADE EX60
Properties	Units	Values
Apparent Density	g/cc	1.80
Typical Grain Size	mm	0.010
Hardness	Shore	62
Breaking Strength Flexural	MPa Kg/cm²	815 13
Specific Resistance	Ωm x 10-6	13
Surface Finish	VDI Ra	30 ~ 24 3.15 ~ 1.60
Maximum block size	mm	310 x 620 x 1220

GRAPHITE GRADE EX70
Properties	Units	Values
Apparent Density	g/cc	1.85
Typical Grain Size	mm	0.006
Hardness	Shore	70
Breaking Strength Flexural	MPa Kg/cm²	68.8 700
Specific Resistance	Ωm x 10-6	15
Surface Finish	VDI Ra	27 ~ 21 2.24 ~ 1.12
Maximum block size	mm	235 x 440 x 1000

Premium Grades

GRAPHITE GRADE EDX-6
Properties	Units	Values
Apparent Density	g/cc	1.88
Typical Grain Size	mm	0.005
Hardness	Shore	65
Breaking Strength Flexural	MPa Kg/cm²	865 15
Specific Resistance	Ωm x 10-6	15
Surface Finish	VDI Ra	24 ~ 18 1.60 ~ 0.80
Maximum block size	mm	111 x 305 x 610

GRAPHITE GRADE EDX-7
Properties	Units	Values
Apparent Density	g/cc	1.82
Typical Grain Size	mm	0.003
Hardness	Shore	68
Breaking Strength Flexural	MPa Kg/cm²	95.0 970
Specific Resistance	Ωm x 10-6	17
Surface Finish	VDI Ra	21 ~ 15 1.12 ~ 0.56
Maximum block size	mm	100 x 300 x 400

Ibiden Carbon and graphite Applications

Ibiden Graphite is deployed in many industrial areas due to various application ans special features.

• Graphite parts in silicon semiconductor fields.
• Graphite parts in compound semiconductor fields.
• Graphite electrode for electric discharge machining
• Energy related parts
• Next generation energy equipment parts.