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Graphite Crucibles Grade 2020 offer high performance with good technical and economic effect. They are used in metallurgy, casting, chemical and (scientific) industry in general; they are also used to produce alloy tool steel melting and non-ferrous metal and alloy melting.

Graphite material is oxidised under heat in an air environment, so it is largely used in inert environments and vacuum applications such as in the manufacture of semiconductors and its also used by the nuclear industry. The grade 2020 material we use at Almath has similar properties to our Boron Nitride material allowing for use at extreme temperatures (up to 2760°C), in an inert atmosphere.

Maximum service temperature is 427°C, maximum inert atmosphere service temperature is 2760°C.

Key Benefits

Technological Merit
Good mechanical strength
Long life: Due to a the excellent chemical stability, corrosion, erosion and temperature resistance, the material is afforded a long lifespan.
High heat conduction performance and resistance to thermal shock: Possible to use even at 2760°C in inert atmosphere, high thermal shock resistance at high temperatures.
Excellent corrosion resistance: Resistance is excellent against a wide range of acid and alkaline environments, great degree of chemical stability.

Material properties

Please note that the information set forth herein is offered for comparison only, and is not to be construed as absolute engineering data or constituting a warranty or representation for which we assume legal responsibility.

Property	Unit	Value
Bulk Density	g/cm3	1.77
Flexural Strength	MPa	45
Tensile Strength	MPa	29
Compressive Strength	MPa	98
Specific Resistance	μohm.cm	1550
Grain Size	µm	15
Hardness – Shore	-	52
Hardness – Rockwell H	-	95
Coefficient of thermal expansion (400 to 500°C)	/°C	4.3 x 10E-6
Porosity	%	9
Thermal Conductivity	W/m°C	85
Modulus of Elasticity	GPa	9.2
Ash	ppm	750

DATA MEASUREMENTS – All data measurements are typical and made at room temperature unless otherwise noted.
THERMAL SHOCK RESISTANCE – Tests are run by quenching samples into water from various elevated temperatures. The change in temperature where a sharp decrease in flexural strength is observed is listed as ‘delta Tc’.
CHEMICAL RESISTANCE – Although all alumina and zirconia ceramics are highly resistant to chemical attack, it is recommended that specific applications are discussed with Almath Crucibles to ensure optimum ceramic selection.

Material Datasheets

Graphite Substrate Grades

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Almath Crucibles Ltd.

Epsom Building,
The Running Horse,
Burrough Green,
Newmarket, Suffolk
CB8 9NE

ISO 9001:2015 registered
(CQS Cert #GB2001792)

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Graphite

Graphite

Key Benefits

Material properties

Material Datasheets

View our full range of Graphite products.

Contact us to discuss a custom Graphite solution.

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Contact

Opening Hours

View our full range of
Graphite products.