Graphite

Carbon Graphite

With expertise and competence grown over decades, Ultramat focuses on the supply of steady quality Graphite materials and reliable deliveries. We supply custom produced parts according to your drawing and specifications.

Isostatic Graphite

We offer a range of Isostatic Graphite products and grades for various applications. High purity graphite materials with ash content as low as 50 ppm, and Non-Oxidizing treated materials are available.

The following isostatic graphite UMC-15 and UMC-35 Grades are made with very fine grain sizes, increasing strength and density. UMC Isostatic graphite materials are alternatives for many cold pressed grades used in continuous casting dies, crucibles and heating elements. UME-15 and UME-35 are used for EDM roughing and finishing work. UMS-35 is a superior grade for many sintering applications.

Grade Name	Unit	UMC-15	UMC-35	UME-15	UME-35	UMS-35
Bulk Density	g/cm3	1.75	1.85	1.82	1.90	1.90
Ash Content	ppm	50	50	50	50	50
Specific Electrical Resistivity	µΩm	9.0	10.0	12.0	13.0	8.5
Bending Strength	MPa	38.0	46.0	48.0	60.0	55.0
Compressive Strength	MPa	65.0	85.0	115.0	135.0	95.0
Thermal Conductivity	W/mK	110-120	130-140	85-110	85-110	149
Hardness	Shore	42	48	65	70	53
C.T.E	10-6/℃	5.46	4.75	5.8	5.8	5.1
Standard Sizes	510x310x210/250 mm 610x510x250 mm		Upon request	Upon request	Upon request	Upon request

Extruded Graphite

With a perfectly homogenous structure and fine grain, our extruded graphite materials are easy to machine to precision. We currently offer three specialty extruded graphite grades to perfectly match your requirements.

Low Electrical Resistivity Grade:

Property	Unit	Grade: UMRD-N
Bulk Density	g/cm³	1.72
Ash Content	ppm	< 0.1%
Particle Size	mm	0.8
Resistivity	µΩm	7.5
Bending Strength	MPa	20.0
Compressive Strength	MPa	40.0
Standard Sizes	45x1250mm, 50x1250m [100…500] x 1800mm

A wide range metal or resin impregnated grades are available. Please contact us for further information.

Grade Name	Unit	UMF	UMFR	UMFR-N
Bulk Density	g/cm³	1.65	1.72	1.74
Ash Content	%	< 0.3%	< 0.2%	< 0.1%
Particle Size	mm	2.0	0.8	0.8
Resistivity	MPa	10.0	8.0	8.5
Bending Strength	MPa	13.0	16.0	19.0
Compressive Strength	MPa	27.0	35.0	39.0
Standard Sizes	Upon request	850/650x400x1830mm 650x500x1830mm	650x500x1830/2200mm 650x650x1830mm

(* The above data should be regarded as general information, not guaranteed specification limits.)

UMF Grade is an ideal economic material for simple applications.

UMFR Grade is the most popular multi-purpose material with higher density, higher mechanical strength, and less porosity.

UMFR-N Grade is suitable for applications which have strict requirements on the material with a very homogeneous grain structure.

Graphite Insulation Rigid Felt Board

Our rigid graphite insulation felt board materials (graphite foil coating on One side or both sides) have excellent thermal shock resistant and low thermal conductivity properties, which makes them ideal for insulations used in high temperature furnaces.

Grade Name	Unit	Rigid Felt
Bulk Density	g/cm³	0.16-0.20
Carbon Content	%	99% Min.
Ash Content	ppm	300 Max.
Thermal Conductivity 1150C	W/m.k	0.20
Process Temperature	°C	2300
Operation Temperature	Air Vacuum Inert Gas	Max.400 °C Max.2400 °C Max.3400 °C

Graphite Insulation Soft Felt Roll

With an excellent thermal shock resistance and low thermal conductivity, our soft graphite insulation felt material is ideal for high temperature furnace applications.

Grade Name	Unit	Soft Felt
Bulk Density	g/cm³	0.12-0.14
Carbon Content	%	99% Min
Ash Content	ppm	300 Max.
Thermal Conductivity 1150C	W/m.k	0.18
Process Temperature	°C	2300
Operation Temperature	Air Vacuum Inert Gas	Max.400 °C Max.2400 °C Max.3400 °C

Graphite for Vacuum Furnaces

Graphite hot zone elements according to drawings

Connectors

Shields

CVD Fixtures

Fasteners,

Curved Heating Elements

Supports

Fixtures

Crucibles and Boats

Graphite plates and blocks

Diverse graphite parts:

Graphite Piston Rings and Graphite Rod packings, used in Pistons Viper Blades for thin film evaporators

Steam Rotary joint rings for rotary pressure joints in Paper mills

Graphite Plates, blocks, rings and tubes

Graphite Boats for Copper, Zinc and Aluminum Extrusions

Plates and Blocks used in Glass manufacturing

Parts for petrochemical industries

High density Blocks for casting dies

Graphite tubes & pipes

Crucibles, boats and trays

PTFE and Carbon Filled PTFE Sheets, Rods etc.

Custom elements

Graphite and Carbon pump elements:

Seal faces

Washers & seals for water pumps

Bearings and bushings

Vanes for petrol pumps, rotary pumps and vacuum pumps

Refineries & chemical industries:

Segment rings & Seals for all types of compressors & turbines

Rasching rings for distillation towers cooling tower, petrochemical towers used as tower packings

Carbon, PTFE and Graphite Filled PTFE Packing rings