February 26, 2018

The Different Techniques for Making Brass Extrusions

Extrusion is a metalworking process that involves forcing a metal inside a die with a different cross section. Due to the compression and force applied onto the inlet, the metal is deformed as it is fed and the different shapes of the brass extrusions are formed. Most people already know the gist of the extrusion manufacturing, but what many don’t know is the different types of extrusion processing. Here are the four major types of extrusion and how each of them works:

A Musical Instrument Made of Quality Brass Exudes an Elegant Gold Sheen

Direct Extrusions. Also known as the forward extrusion, this process involves having the billet move in the same direction as the ram and punch. A lot of friction is created between the container and the billet because the billet slides against a stationary wall. This method requires a lot of force to make the final product. To prevent oxidation, a dummy block with a slightly smaller diameter is used during hot extrusion. This process is best used for creating solid circular and non-circular extrusions as well as hollowed tubes and cups.

Indirect Extrusion. Also known as backward extrusion, indirect extrusion occurs when the punch moves in the opposite direction of the billet. There is less friction because no relative motion between the billet and container happens. This also means that less force is required during the manufacturing of extrusions. Although indirect extrusion uses less energy, the process cannot produce long extrusions. Many manufacturers actually combine both direct and indirect extrusion to create final products of the best quality.

Hydrostatic Extrusion. As the name suggests, this process involves the use of liquids. The pressure for extrusion is transmitted via the fluid. There is no friction created in this process because no contact between the container and billet is established. Highly brittle materials benefit the most from this process because pressure is limited and the process is done in room temperature.

Impact Extrusion. The best way to produce hollow sections like cups is through the impact extrusion method. However, this type of extrusion process is also best for manufacturing metal tubes with smaller wall thickness. Metal tubes like brass, copper, lead, and aluminum are all made using impact extrusion. The process is very simple seeing as the punch strikes at the slug at very high speeds to create a forceful impact and the extrusions are made.

Metal extrusions like those made of brass have a plethora of uses. Although the processes involved in making the pieces are a little complicated it is always good to know how things are made.


Types of Extrusion and Extrusion Equipment: Module 5 Extrusion Lecture PDF,
Extrusion and Their Types in Manufacturing Process,

Round Vs. Square Brass Tube, Why Use the Different Shapes

There is no denying the versatility and strength of brass tube. The debate on these tubes isn’t whether they should be used; it is which shape is better suited for the job. Tubes made of brass come in all shapes and sizes. Common shapes range from the typical round and square, while other suppliers can make custom-made shapes upon a client’s request. All of this is because brass tubes have a lot of applications both in practicality and design.

When it comes to the round and square tubes, many still debate on which one is better. Here is a quick comparison of both shapes:

A 3D Rendering of Round Brass Tube Neatly Stacked Over Each Other

The Round Tube

The brass round tube is most commonly used for practical and architectural needs. They are designed for transporting fluid across one space to another in a quick and timely manner. Round tubes are very strong and rigid and the strength of the tube is evenly distributed in every direction. For those reasons, they have more structural integrity compared to their square counterparts.

Since the distribution of strength and metal is fairly even in round tubes, control during distortion and bending is easy to manage. This makes round tubes cutting more accurate when resizing the tubes for various uses. Round tubes are also easier to weld together because of their shape. Finally, add to the fact that round tubes are 20% lighter than square tubes, which makes them easier to transport for large construction projects. The result of all these advantages makes round tubes the better candidate for practicality.

The Square Tube

Upon first glance it seems like there is no use for brass square tubes in the market since round tubes already have a long list of advantages. Before discounting square tubes, take note of its advantages first. Square tubes are most commonly used for interior decorating purposes. They are used in fixtures and furniture to add color, stability, and enhanced durability.

A square tube is also very durable, but it does have its weak spots. It cannot hold as much weight as the round tube, nor is it capable of transporting liquid quickly, but it is very easy to cut. The best use for square metal tubes is for sharp corners where round tubes cannot fit. Projects like those dealing with beams and other complex angles are when square tubes are most useful.

Always Ask a Professional for Advice

Brass tubing is very handy, regardless of shape. However, using the tubes without doing more research on their specific uses and advantages can lead to trouble. If you are unsure of which tube shape is better for your project, ask a metal supplier or an experienced contractor for their opinions. It is better to be safe than sorry.

About Rotax Metals: Aside from the usual shapes and sizes there are also other brass tubing shapes available if you know where to look. Rotax Metals is the leading supplier of metals for all industries ranging from construction to jewelry making. Any kind of tube shape you want, they can provide. It is also a guarantee that all Rotax Metals products are high-quality and made using eco-friendly practices. With the help of Rotax Metals you can build and create anything out of metal.


Round and Square Tube Bending: Tension and Compression,
Metal Tubes Information,

Product categories