There are two types of tubing processes: cold drawing and extrusion
In the extrusion process, the aluminum billet is heated to at least 8OO°, pushed through a die, then flooded with cool air. This drastic temperature change causes the shape to react with non-symmetrical, shrinkage and the sidewall to belly in.
At A-Alpha Waveguide, we utilize a superior process of cold drawing, in which the tubing is pulled through a hardened steel die at room temperature, allowing for very close tolerances and a higher quality product.
Cold drawing has 2 major benefits:
- The grain structure of the material is refined, creating a uniform composition.
- The dimensions are firmly set. At room temperature, there is no heat related contraction to affect dimensions.