Thermal Conductivity - ASTM E1530 vs ASTM C177? 1

[jabberwock]

Tested the thermal conductivity of a material using ASTM E1530 and the values obtained are quite different (almost factor of 10) from published values obtained via ASTM C177. Is this discrepancy between the two methods reasonable/typical???

 

[EdStainless]

I often see TCs with a range of a factor of three from common well established materials. The test method means everything with TC. Find more published data and re-do your tests.

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Plymouth Tube

 

[jabberwock]

Thanks EdStainless. Do you have any experience in deciding which test method to use? Any guidance you might provide is appreciated.

 

[bobbywvu]

ASTM C177 is an easy way to achieve thermal conductivity where ASTM E 1530 is little stringent. I have results of thermal conductivity of composites using both the methods and they are very much similar.