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Application skills of fasteners in high temperature

Mar 19, 2018

When you are interested in fastening the products that will be exposed to high temperatures, you often need to focus on the type of fasteners that you will use. This is because it will affect the life of the product and how long it will last.


To do this, you will need to understand how fasteners behave when exposed to high temperatures, as well as features that will make them last longer.


How high temperature affects fasteners When you expose many fixed fasteners to high temperatures, one of the challenges you face is oxidation.


Most people think that the main problem you will face is a fastener that melts, but most metals will not do so when exposed to temperatures about 1000 degrees Fahrenheit or lower. Of course, this is unless it is made of a particularly soft material. In addition, other problems you may encounter include rapid expansion of the fastener. This causes them to increase the diameter of the hole. When they calm down, they are likely to shrink and become loose.


When this happens several times, they may even fall out of place, especially when exposed to vibrations as well.


You can use different alloys In order to use fasteners in high temperature environments, you will often find it necessary to use alloys. This allows you to combine the advantages of various metals so that the resulting fasteners are more resistant to high temperature and oxidation.


Some of the most common methods include: A-286: This is a kind of iron, nickel and chromium alloy. It has excellent mechanical properties and is very resistant to oxidation and high temperature. The only downside to using it is that it will only retain these properties up to 1300 degrees Fahrenheit in temperature. On top of that, metals are likely to begin to oxidize.

When exposed to higher temperatures, it eventually melts. Nickel: There are many types of nickel alloys, including nickel sleeve head screws. According to the grade of nickel, they usually have high oxidation resistance at high temperature.

However, it cannot be used for temperatures above 1800 degrees Fahrenheit.


Fasteners available for higher temperatures In some cases, you will find that you have to expose the fasteners to a higher temperature in the range of about 2000 or even 3,000 degrees Fahrenheit. In this case, you can use fasteners made of molybdenum or other alloys.


The titanium sleeve fixing screws are particularly effective in this range. To achieve the highest temperature tolerance, you may also consider fasteners made of ceramics, including alumina and Zirconia. These products can withstand very high temperatures, but the only drawback is that they are not very strong and prone to cracking. Therefore, they are ideal for use in environments that are less likely to be exposed to shocks or other similar forces.


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