SECTION VIEWWhy can you grab the handle, but not the pan?
Try itA pan handle on a thermal camera
The pan sits on the hob. Heat has to travel along the handle to reach your hand, and the air takes some of it away on the way. Change the material, the wall thickness and the length, and watch the temperature where you grip.
NumbersHow big is it?
The sim treats the handle as a 20 mm tube in still kitchen air (about 10 W/m²K) and reads the temperature three quarters of the way along. Real handles also have rivets, coatings and shapes, so take the grip temperature as a guide.
Thermal conductivity in W/m·K: stainless steel about 14 to 16, cast iron and mild steel about 50. Roughly 3× worse.
Source ↗Phenolic (Bakelite-type) plastic carries 0.13 to 0.25 W/m·K, at least fifty times worse than stainless steel.
Source ↗Where you grip a 20 cm stainless handle on a 200 °C pan: solid bar vs a 1 mm hollow tube. Our own maths.
HowWhat happens, step by step
- Heat has to travel to reach your hand.
The pan and the handle are joined, but the far end of the handle only gets heat that made it all the way along.
- The material sets how fast it can travel.
Stainless steel conducts heat about 3× worse than plain iron or steel, so less of it gets through.
- Thin, hollow and long means less gets through.
Less metal to carry the heat and a longer trip, so the air takes most of it before it reaches you.
- Or skip metal altogether.
A plastic or wooden handle carries heat about fifty times worse than stainless, so it stays near room temperature.
Check3 quick questions
A cast iron pan is one piece, handle included: short, solid and a good conductor. That's why it comes with a silicone sleeve.