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Views: 0 Author: Site Editor Publish Time: 2022-11-05 Origin: Site
When deciding how to choose the correct pneumatic fittings for your application, you should examine the different materials that are commonly used in order to determine their different physical properties, gas compatibility, and reaction to, for example, temperature changes.
Aluminium fittings are commonly used for low pressure, low density applications where its low tensile strength is not an issue. It is a lightweight material and most often chosen for its resistance to corrosion, but can be alloyed with other metals to increase its strength and density.
Brass is also corrosion resistant, but much stronger and more durable, and it offers good conductivity and high temperature ductility. It is most commonly chosen for pneumatic fittings because of its excellent performance and machinability.
Although typically more expensive, stainless steel already has excellent corrosion and chemical resistance, with the durability and strength of ordinary steel.
Polypropylene is a thermoplastic that is widely used for pneumatic fittings, as it has high durability, low price and wide compatibility with other materials. It demonstrates excellent bi-axial strength, cold flow and yield elongation. It can safely be used for applications in exposed areas, because it is resistant to weathering, ozone and UV radiation.
Composites are fittings made from various material combinations, such as carbon, graphite and fibreglass. These materials are also used in applications requiring high chemical resistance and temperature durability; they have a high melting point as well as low thermal and electrical conductivity.
For specialised environments, enhanced fittings can be engineered with additional protections such as integral lining, surface coating or plating, or special insulation.
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