How Sintered Metal Tubes Are Made

August 29, 2023

Sintered metal tubes are integral components in a wide range of industries, from automotive and aerospace to filtration and energy. These tubes possess unique qualities, including porosity and durability, making them ideal for various applications. But have you ever wondered how sintered metal tubes are made? Let's delve into the intricate process behind their production.


ㆍThe Powder Metallurgy Process

ㆍCompaction and Shaping

ㆍSintering: Bonding at High Temperatures

ㆍSecondary Operations for Precision

ㆍApplications of Sintered Metal Tubes


Porous Metal Tube


The Powder Metallurgy Process


The manufacturing of sintered metal tubes primarily involves the powder metallurgy process. This technique utilizes finely powdered metals, often alloyed for specific properties, as the raw material. Powder metallurgy enables precise control over material composition, porosity, and mechanical characteristics, resulting in versatile and reliable end products.


Compaction and Shaping


The journey begins with the careful selection and mixing of metal powders to achieve the desired material properties. Once the powder blend is ready, it's compacted under high pressure. This compaction process forms a "green" part with the basic shape of the final tube. The green part's density is lower than the fully dense metal due to the presence of voids between powder particles.


Sintering: Bonding at High Temperatures


The heart of sintered metal tube production lies in the sintering process. The green parts are placed in a controlled atmosphere furnace and heated to temperatures just below the melting point of the metal. During sintering, the metal particles bond together through a process called diffusion, where they migrate and fuse at contact points. The elimination of voids and the creation of strong metal-to-metal bonds result in a solid, porous structure.


Secondary Operations for Precision


After sintering, secondary operations can be performed to achieve precise dimensions and desired characteristics. Machining, grinding, and honing are common techniques employed to enhance tolerances and surface finish. These operations refine the sintered metal tubes to meet strict specifications and achieve optimal functionality.


Applications of Sintered Metal Tubes


Sintered metal tubes find applications in diverse industries. In automotive manufacturing, they are used as oil-impregnated bearings for engines and transmissions. In the aerospace sector, they serve as filters for hydraulic systems and ventilation. The chemical industry employs them as catalyst supports, and the medical field relies on them for applications such as drug delivery systems. The tubes' porous structure allows for controlled fluid flow, heat exchange, and filtration, making them indispensable components in many processes.




The production of sintered metal tubes is a multi-step process that combines science, technology, and precision engineering. From selecting the right blend of metal powders to carefully controlling the sintering conditions, each step contributes to the final product's quality and functionality. The ability to tailor material properties and achieve intricate designs sets sintered metal tubes apart in various industries.


As technology advances, the manufacturing process continues to evolve, leading to improved material properties, enhanced efficiency, and reduced production costs. The versatility of sintered metal tubes ensures their relevance across an ever-expanding spectrum of applications. So, the next time you encounter a sintered metal tube in an automobile, a medical device, or an industrial setting, you'll have a deeper appreciation for the intricate journey it undertook from metal powder to a vital component. We are a sintered metal tube supplier. If you are interested in our products, please contact us now!