# Relationship between heat coefficient and conductance

I'm involved in a project and part of it involves heat coefficient and heat conductance. What's the relationship between the two, given that the SI unit for heat coefficient is $W/mK$ and the SI unit for heat conductance is $W/m^2K$?

$W$ - Heat Energy (Watts/Joules per second)
$m$ - Length
$m^2$ - Area
$K$ - Difference in Temperature (Kelvin)

Does anyone know the above parameters for steel? Especially heat conductance.

Thank you.

• What does googling this tell you? Commented Jul 16, 2018 at 11:30
• Googling doesn't really explain much on the conductance. Mostly heat co-efficient. Commented Jul 16, 2018 at 11:34
• Actually, you've got it backwards: heat transfer coefficient is $W/m^2K$ and thermal conductivity is $W/mK$. Commented Jul 16, 2018 at 12:06
• Mechanical/Thermal Engineering problem?
– user103380
Commented Jul 16, 2018 at 14:16
• I appreciate the correction. Commented Jul 18, 2018 at 9:02

There is no intrinsic relationship between the two. Heat transfer coefficient ( $W/m^2K$) is a measure of how readily heat moves across the interface between two different materials, while thermal conductivity ($W/mK$) is a measure of how easily it moves within a single material.