To understand how hot plasma cutters can become, let’s consider the nature of plasma. Plasma is the fourth condition of matter, the first three being solids, liquids, and gases. These states can evolve and change from one state to another when energy, usually in the form of heat, is introduced.

If a solid is heated, it will turn into liquid. Heat it some more and the liquid will into gas and evaporate. And if you continue heating, the gas will become ionized and electrically conductive thus turning into plasma.

So, it’s already clear, that to arrive at the fourth state of plasma, temperatures will need to be extraordinarily elevated.

the plasma cutter was a very expensive industrial tool but its have very hot

How hot can a plasma cutter get? Pretty Hot! Plasma cutters can achieve an impressive 45,000° Fahrenheit, causing your plasma arc to be equally dangerous to look at and not only operate. It is one of the principal motives for using the correct eye protective wear when operating these high-performing machines.

A plasma cutter will become extremely hot very rapidly. These cutters must necessarily become hot enough to cut through conductive metals and in particular very thick metals. The cutting of thick metals is truly where the plasma cutter distinguishes itself in comparison with other cutting methods.  

Consider that when you use an oxyacetylene flame, it can reach a temperature of approximately 9,000°F, so your plasma cutter will achieve a temperature five times hotter than this. Due to this alone, the use of a plasma cutter is inherently more dangerous, and it cannot come into contact with anything other than the metal you need to cut with it.

All this heat production comes with a price tag, however. Electric bills associated with the operation of plasma cutters can be very expensive due to the amount of electricity employed. A good rule of thumb is to shut off your plasma cutter as soon as you’ve completed your cut.

Is a Plasma Cutter Hotter Than the Sun?

Remember that for a physicist, the temperature does not only indicate feelings of hot or cold, but also will describe the energy particles that create an environment such as that of the sun or of plasma. The movements of these energy particles, which include atoms, molecules, and nuclei, and the speed of their motion will together determine their energy.

So, when we ask if a plasma cutter is hotter than the sun, this will depend on exactly what part of the sun we are referring to. The temperature at the sun’s center is approximately 27 million degrees Fahrenheit. So, in this case, no, the sun’s center beats out a plasma cutter without question, and frankly just about everything else. There is very little competition for 27 million degrees F.! 

If, however, we consider the photosphere layer of the sun, which is the layer that the human eye perceives, well no, in this case, a plasma cutter is quite a bit hotter. How can this be?

Well, the sun is a gigantic group or collection of gases. Unlike the earth, it does not have a solid crust, and each layer of the sun has its own distinctive characteristics. In fact, the sun’s photosphere layer measures roughly 10,000°F, so the plasma cutter is considerably hotter.

A plasma cutter is also hotter than our own planet earth’s core. The center of the earth is closer to 11,000° F, so your plasma cutter will be just about four times hotter than the earth’s core as well.

Plasma Cutter Hotter in  the Sun

How Hot Is a Plasma Arc?

A plasma arc is used in plasma arc welding and is very similar to a welding machine arc. This type of welding uses an electric arc created with an electrode, but it integrates the use of plasma. As the plasma increases in temperature, it is pushed through a nozzle at the torch’s tip.

A plasma arc is used in plasma arc welding  in the iron

Depending on the plasma torch utilized, and its specific settings, it can manage to achieve a temperature of 50,000°F. Consider that the normal welding arc may only achieve a temperature of 10,000°F.

The plasma will flow out of the torch at a very high speed, almost reaching Mach1 or the speed of sound. This exceptional combination of speed and heat permits the plasma arc to melt almost any material including aluminum, brass, copper, iron, and steel among others.

As in plasma cutters, the plasma used in plasma arc welding is gas that has become ionized, making it superconductive and permitting electrical current to flow through it.


A plasma cutter can achieve extraordinarily high temperatures, as it easily surpasses the earth’s core temperature and the sun’s surface temperature with its approximate maximum temperature of 45,000°F.  However, not to worry because plasma flame temperatures can be modified and controlled. 

    Leave a Reply

    Your email address will not be published. Required fields are marked *

    Copyright © 2020 by KnightleyStudio. All Rights Reserved.