Need for High-Temperature Fasteners

Regular metal fasteners have tendency to melt as soon as the temperature crosses 1000 degree Fahrenheit. These fasteners can undergo oxidation at this temperature. Thus, the need arises for having special high temperature fasteners which will have capacity to withstand extrema heat and cool down efficiently without getting damaged.

Alloys which are being used in such fasteners:

Stainless Steel 630- One of the most widely used precipitated-hardened steel. This alloy has high tensile strength and ductility.

Stainless Steel 309 & 310- Have higher Nickel and Chromium content than other alloys. Recommended for use in high temperature applications.

Nickel Alloy- Can be used at temperature above 1800 degree Fahrenheit. There are many types of nickel alloy and are used depending on the grade of Inconel. They usually have high oxidation resistance.

A266- An alloy of Iron, Nickel and Chrome with excellent mechanical properties and high resistance oxidation. They can be used up to the temperatures of 1300 degree Fahrenheit. Above this the metal will start oxidizing and if exposed to higher temperature, they have the tendency to even melt.

Fasteners for Even Higher Temperatures

Fasteners made out of molybdenum and other alloys can be used even at much higher temperature of around 2000-3000 degree Fahrenheit. Titanium Socket Set Screw are effective at this range.

For the highest temperature resistance, fasteners made out of ceramic (including alumina and zirconia) can also be considered. They are hence being ideal for use in environment where they are unlikely to be exposed to the similar alloys.