Thermal Conductivity Testing

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ASTM C182

Standard Test Method for Thermal Conductivity of Insulating Firebrick

The heat flow through a refractory is determined with a water-cooled copper calorimeter. The temperature limit of refractory must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The specimens required are six 9" bricks or an 18" x 13.5" x 2.5" slab.

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ASTM C201

Standard Test Method for Thermal Conductivity of Refractories

The heat flow through a refractory is determined with a water-cooled copper calorimeter. The temperature limit of refractory must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The specimens required are six 9" bricks or an 18" x 13.5" x 2.5" slab.

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ASTM C202

Standard Test Method for Thermal Conductivity of Refractory Brick

The heat flow through a refractory is determined with a water-cooled copper calorimeter. The temperature limit of refractory must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The specimens required are six 9" bricks or an 18" x 13.5" x 2.5" slab.

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ASTM C417

Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories

The heat flow through a refractory is determined with a water-cooled copper calorimeter. The temperature limit of refractory must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The specimens required are six 9" bricks or an 18" x 13.5" x 2.5" slab.

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ASTM C892

Thermal Conductivity of Fibrous Insulating Material

The heat flow through a material is determined with a water-cooled copper calorimeter. The temperature limit must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The standard sample of fibrous insulation requires that new material be available to make a 18" x 13.5" x 2" pad.  As blankets are available in several thicknesses, it is often necessary to cut several pieces of blanket that can be placed one upon the other to make the 2" thickness.

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ASTM C1113, ASTM C1113M

Standard Test Method for Thermal Conductivity of Refractories by Hot Wire (Platinum Resistance Thermometer Technique)

The hot wire technique is a transient, intermittent isothermal method for measuring thermal conductivity. A thin platinum wire is placed between two appropriately prepared 9" bricks of same density. Heat generated by current applied to the wire is conducted away from the wire at a rate dependent on the thermal conductivity of the material. Minimum of two bricks required.

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ASTM E1461

Standard Test Method for Thermal Diffusivity and Conductivity by the Flash Method

Thermal diffusivity is measured by laser flash. The sample size for the Laser Flash unit is a 0.500" (plus 0.000"/minus 0.005") diameter disk. Samples of 0.08", 0.12" and 0.16" thickness should be provided.  Since sample configuration may be dependent on sample composition, inquire before machining samples for submittal. Thermal conductivity is calculated from the thermal diffusivity, heat capacity, and density. See ASTM E1269 for sample size requirements for determination of heat capacity. The diffusivity price schedule includes the heat capacity determination.

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