I think in the text box for weld size you gotta give dimensions in secondary units manually.. for secondary units in dimensions, change detail option in drawing properties
Select the whole column or row or complete table( highlight in green), and then right click, you will find option width and height, give the value in inches
@ATSwork
You are trying solve rate of heat transfer problem, correct?
Neglect transient for a while and calculate steady state natural convection
and multiply that value with 240, you will get value of heat loss water in joules
By the way what is the shape of steel you immerse?