When cutting material that is 1/2 inch thick with OAC, what torch inclination should be used?

When cutting material that is 1/2 inch thick using oxy-acetylene cutting (OAC), the recommended torch inclination is 90 degrees to the plane of the material, or perpendicular. This angle allows for better control and optimal cutting efficiency. When the torch is held perpendicular, the heat from the flame can effectively penetrate the material, ensuring that the cut is clean and straight.

Holding the torch at the correct angle is crucial to achieve proper oxygen flow and to facilitate effective melting of the material being cut. A perpendicular angle ensures that the cutting oxygen strikes the molten metal directly, promoting a more uniform burn-off and reduced chances of slag sticking to the cut edge.

Angles such as 30, 45, or 60 degrees may not provide the same quality of cut for this material thickness, as they can affect the angle of the flame and the flow of oxygen directed at the metal being severed. This can lead to inefficient cutting and potential issues with the quality of the finished edge. Therefore, maintaining a 90-degree angle is essential for effective cutting in this scenario.