Hello. New here and trying to figure out if my formula is right. I'm a controls guy so this other stuff keeps me on the ropes! Trying to heat 179lb's of steel 1440F in 30 minutes and find wattage needed. It appears the formula is: #Lb's X specific heat X differential temp 3.415 x .5 (minutes) 179 x .12 x 1440 1.7075 18,130.8 Watts Does this seem correct? This is all from trying to determine if a heat treat furnace can bring these parts up to temp in the required amount of time. Thanks for any replies.