Metal tube and hollow bars are utilized in a range kinds of applications for structural purposes. They can provide a savings in comparison to solid bar stock, and weigh less than an actual bar made of the same material and size, while still offering durability. Although hollow bar and tube are similar in their shape however, we’ll focus on the distinction between tubes 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
One of the major differences between hollow bar is the method by which they are produced. Tube is created by slitting coils of an alloy and passing them through the tube mill which is a set of dies which form the cut coil into a tube shape, whether it is square, round, or rectangular as an example. When the tube is it is formed to the desired shape all edges of the tube are joined by welding. The process of welding can differ according to the type of material thickness, the material type, and preferences of the manufacturing team. In general, high frequency welding or the use of electric resistance welding. The weld metal that is left over is taken away from outside. In most cases new tubings are put through an annealing process to make a homogenous end product.
In hollow bars welding is not required. There are two primary ways to make hollow bars using the process, with the procedure based on the kind of material used and its dimensional tolerance demands. The first method to create hollow bar is through drilling. This method involves putting a drill into the solid bar stock material. This procedure can create high-quality, precise part dimensions for applications that require precision. The other process is known as centrifugal cast. This occurs when a round mold is turned at high speeds while the molten metal is being poured inside the mould. The force produced by the mold’s spinning forces the molten metal to the mold’s interior wall, which cools and then becomes hard. Hallow bar that is casted by centrifugal force tends to be very dense and homogeneous. There are only two types of metals that can be attributed to hollow bar: bronze and stainless steel.
Quality
Hollow bar can be created in a way to make it extremely homogeneous, and can also have extremely precise dimension tolerances. However the process of achieving tight tolerances in dimensional dimensions are more difficult with tubes. Additionally, if proper the proper care is not taken by the producer using the welding method for the production of tube may produce a product of lower quality that is not what you want. The weld metal that is left over must be removed in order to prevent stress-constrictors within the tube that is welded. The tube must be annealed or heated treated after welding to ensure an homogenous product is produced. The welding process can result in various crystalline structures around the weld line that may influence any desired properties in the mechanical property of tube.
Materials
Many different types of materials can be made into tube that is welded. If the material has the capability to conduct electricity, then electric resistance welding can be employed to bond the material to itself, forming tubing.
Hollow bars can be made from a variety of materials, too. However, more durable and hard substances may be difficult to extrude, so the piercing technique may be utilized instead.
At the final point, the decision between seamless tubes and hollow bars will ultimately boil down to the specific application and the application, since neither is generally superior or more affordable over the other. The material used will depend on the type and tolerances, various design aspects should be considered prior to an option is taken.
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