Hollow bar and metal tube are utilized in a range different structural uses. They can provide a savings in comparison to solid metal bar stock, while weighting less than an actual bar similar to the material and size, while offering a lot of toughness. Although hollow bar and tube may have similar shapes but we’ll look at the differences between tube as well as hollow bars.
The differences between hollow bar and tube are: hollow bar is that they are:
Manufacturing Process
Quality
Materials
Manufacturing Process
The main difference between seamless tubes and hollow bars is the way the two are created. Tube is created by slitting coils of an alloy and passing them through the tube mill which is a set of dies that shape the cut coil into a tube shape, or square, round or rectangular as an example. After being made to the desired shape all edges of the tube are joined by welding. The process of welding may differ according to the type of material thickness, the material type, and the preferences by the team responsible for manufacturing. In general, high frequency welding or the use of electric resistance welding. The remaining weld metal is taken away from outside. Often new tubings are taken through an annealing procedure to produce a homogeneous final product.
In hollow bars welding is not necessary. There are two methods to make hollow bar, and the process dependent on the type of material and the dimensional tolerances required. The first method to create hollow bar is through drilling. This method involves the use of a drill to drill the solid bar stock material. This method can result in high-quality, precise part dimensions that are suitable for certain applications. Another technique is called centrifugal casting. It is when a circular mold is turned at high speed as the molten metal is being poured in the mold. The force produced by the mold’s spinning forces the molten material into the mold’s interior wall, which cools and then becomes hard. The hallow bar casted by centrifugal forces tends to be thick and homogeneous. There are only two metals that are related to hollow bars: bronze and stainless steel.
Quality
Hollow bar is able into extremely homogeneous, and can also be extremely precise in dimension tolerances. However getting tight dimensional tolerances are more difficult with tubes. If you don’t take care by the producer using the welding method to make tube could result in a less high-quality product than what is desired. The excess metal from welding must be removed in order to prevent stress-constrictors within the tube that is welded. The tube must be heated-treated or annealed following welding to ensure an homogenous product is made. Welding procedures can produce various crystalline structures around the weld area that could alter any desired properties in the mechanical property of tube.
Materials
Many different types of materials can be molded into weldable tubing. If the material is conductive to electricity, electrical resistance welding can be employed to join the material to itself, forming tubing.
Hollow bars can be made from a variety of materials, too. However, stronger and harder substances may be difficult to extrude, so the piercing technique can be employed instead.
At the final point, the decision between hollow or tube bar is ultimately down to the specific application in which one is generally superior or more affordable in comparison to the others. The material used will depend on the type and tolerances, various design aspects should be considered prior to making a decision between the two is taken.
