Thermal Conductivity Question

1. Apr 22, 2007

heiroglif

Hi all,

I remember reading somewhere that Cast iron in general has a uniform thermal conductivity k of approx. 47-55, and this remains the same for a wide range of temperatures,

im not sure if this is correct, if anyone has any information on this subject, that would be great, if i could ask for links to prove your points too. Thanks.

H

2. Apr 22, 2007

Integral

Staff Emeritus
K has Units, in fact it can appear in a dazzeling array of different units. What are yours?

a quick web search showed up 80 $\frac {W} {m K^o}$

Last edited: Apr 22, 2007
3. Apr 22, 2007

heiroglif

..

hi, yes im using the same units,

i think ur getting mixed up with the material tho, remember its "cast iron" not regular iron which is roughly 80 W/mK.

Cast iron from some web searches is around 55 W/mK..

http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html

4. May 3, 2007

ECU0406

has anyone seen conductivity in a percent? that is what the quality department uses and i need specific heat. any ideas? i tried to figure out the units but cant

5. May 3, 2007

Gokul43201

Staff Emeritus
Do you have a reference or link for this? That will make it easier to help.

6. May 4, 2007

ECU0406

i guess we can't attach excel spreadsheets which sucks but here it is in word. the conductivity formula is at the bottom. the quality guy here isn't any help. he's been here for 40 yrs and can't tell me how things work

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7. May 4, 2007

Integral

Staff Emeritus
Unfortunately, without the formulas associated with the percentage cell we cannot say much. Definitions of the other columns would be informative.

8. May 4, 2007

ECU0406

i elaborated, everything should be there now

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