What is Cutting Gas in Welding?

In welding, cutting gas is a gas-directed into the torch to surround the electrode, which becomes ionized by the arc to form a plasma and issues from the torch nozzle as a plasma jet. (Also referred to as plasma gas or orifice gas).

Which gas is used for cutting and welding? Oxy-fuel welding and cutting

Cutting gas is used in both oxy-fuel and plasma cutting processes. In oxy-fuel cutting, the cutting gas is typically oxygen, which reacts with the metal being cut to create heat that melts through the material. In plasma cutting, an inert gas such as nitrogen or argon is used. The plasma jet created by the electrical arc heats and melts the material being cut.

While oxygen can be used for cutting thicker materials, it is not recommended for thinner materials as it can cause the metal to burn. Inert gases are a better choice for cutting thinner materials as they will not react with the metal and cause burning.

When choosing a cutting gas, it is important to consider the type of metal being cut, the thickness of the material, and the desired cutting speed. Different metals and different thicknesses will require different types of gas and different flow rates in order to get the best results. Consulting with an expert can help you choose the right gas for your project.

Which gas is used for cutting and welding?

Oxygen is used for cutting and welding.

How is gas cutting done?

Gas cutting is done by using a gas torch to heat and melt the metal.

Types of gas cutting

There are 2 types of gas cutting: oxy-fuel and plasma.

  • In oxyfuel gas cutting, the cutting gas is typically oxygen, which reacts with the metal being cut to create heat that melts through the material. In plasma cutting, an inert gas such as nitrogen or argon is used.
  • The plasma jet created by the electrical arc heats and melts the material being cut.

Flame cutting

Flame cutting is a type of gas cutting that uses oxygen and fuel gas, such as:

  • acetylene,
  • propane,
  • or natural gas.

The oxygen reacts with the metal to create heat that melts through the material.

Related Links

Choosing a gas for oxyfuel cutting
Oxy-fuel welding and cutting
Welding & cutting gases – messergroup.com
Oxyfuel Cutting – Process and Fuel Gases – TWI
Metal Cutting Gas (MCG)

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