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Isotropic Graphite<Fine/Ultra Fine Grain>

DATA1 FINE/ULTRA FINE GRAIN

CIP (Cold Isostatic Pressing) is a method of cold hydrostatic pressure molding usually known as "rubber press". We have one of the largest rubber-press molding containers in Japan, which have inner diameter of 98"~h118" (2,500mmh3,000mm) .

The CIP method involves transmitting a pressure with a liquid; in other words, it is a method of applying Pascal's law to powder molding. When powder is sealed in a rubber bag which has little transformation resistance and liquid pressure is applied, all of the powder surfaces receive the same compressive force equal to the liquid pressure so that the powder is compressed and molded isotropically.

Fine grain high density graphite with uniform structure can be obtained with this method. By applying the large graphite part manufacturing technology, which we have developed over the years, to rubber-press (CIP), we now can offer G series isotropic graphite entirely suitable for today's most advanced applications.

Grade Specific Gravity
(-)
Specific Resistance
(μΩm)
Young's Modulus
(GPa)
Flexural Strength
(MPa)
Shore Hardness
(-)
*C.T.E
(×10-6
/°C)
Thermal Conductivity
(W/mK)
G250 1.70 12.0 9.8 39.2 46 4.8 108
G320 1.75 14.0 9.3 32.3 46 4.3 93
G330 1.79 13.0 9.8 39.2 53 4.8 104
G347 1.85 11.0 10.8 49.0 58 5.5 116
G348 1.92 10.0 12.3 63.7 68 5.5 128
G458 1.86 9.5 11.3 53.9 54 4.4 139
G520 1.83 12.0 10.8 56.8 62 5.5 116
G530 1.82 13.0 11.3 61.7 64 5.5 104
G535 1.82 17.0 10.8 63.7 72 5.5 81
G540 1.85 15.0 13.7 88.2 78 5.5 93
G077 1.82 12.0 11.0 70.0 66 7.1 100

Notes:

These properties are typical average value and not guaranteed.

All properties measured at room temperature except for C.T.E. (R.T. to 1000), if not stated otherwise.

Flexural strength determined using third point loading.

Other grades are also available.

*C.T.E.=Coefficient of thermal expansion

DATA1 EDM Graphite

Electric discharge machining (EDM) electrodes require graphite because it ensures less electrode wear, faster metal removal rates and both the preferred surface finish and tolerance. Our EDM electrodes are widely used for EDMing automotive forging molds, plastic injection molds and aluminum extrusion canisters. EDM graphite is marketed on the international market.

Grade Specific
Gravity
(-)
Specific
resistance
(μΩm)
Flexural Strength
(MPa)
Shore
hardness
(-)
Average
grain size
(μm)
HK-0 1.80 12.0 39.0 56 13
HK-1 1.85 11.0 50.0 58 11
HK-15 1.83 12.5 53.9 62 7
HK-2 1.82 13.5 63.7 64 7
HK-75 1.82 16.5 65.7 72 4
HK-3 1.84 15.5 88.2 78 2
HK-6 1.86 12.0 85.0 68 3
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