Flame Cutting, Plasma Cutting, and Waterjet Cutting – Differences

There are many options for metal cutting when you need it cut to size. Not all processes will work for every job and every type of metal.

You may choose to use flame cutting or plasma cutting for your project. However, it is important that you understand the differences between these cutting methods.

Flame Cutting

The process of flame cutting involves the use of oxygen and fuel to produce a flame that can melt or sever material. It is often called “oxyfuel cutting” because it uses oxygen and fuel to cut the material.

To heat the material to its kindling temperature, flame-cutting uses a neutral flame. Once this temperature is reached, the operator pushes a lever which releases an additional stream of oxygen into the flame. This is used to cut the material and blow out the molten metal (or dross).

The Advantages and Drawbacks of Flame Cutting

Flammable flame cutting is a great option because it doesn’t require power. All you need is a cylinder to hold oxygen and a cylinder to hold fuel gas.

Hoses, a torch, a torch, and a striker will do. It is a great choice for fieldwork. Flame cutting can also be used for cutting extremely thick metals.

The flame cutting process can cut steel up to four feet thick with the right equipment. Flammable cutting is also very affordable.

When it comes to the types of material which can be cut, flame cutting is a disadvantage. Carbon steel and low alloy steels are the only types of materials that can be flame cut.

Cast irons are also not allowed to be flame-cut. The flame cutting process will not cut any other materials. Plasma cutting and waterjet cutting are slower than flame cutting.

The heat of flame cutting can cause metal edges to form a thin, brittle layer from solidified steel. This is called the decarburized coating. This layer may need to be removed depending on the application.

The heat from flame cutting may cause the decarburized area to be affected by heat. This can result in metal in the Heat Affected zone becoming hardened and brittle without any post-cutting heat treatment such as Annealing.

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