If your product is operating in high-temperature conditions, it is better for you to choose a high-temperature service alloy for a good result.
Choosing the right alloy for a product depends upon the environmental conditions in which the product is to be used.
There are many types of alloys with different properties for different temperature conditions.
However, harsh temperature circumstances vary for different operations, making it difficult to select the proper product. In one context, a heat-resistant alloy may be able to tolerate intense temperatures in one operation but may not be enough for others.
Selecting the correct alloys for high-temperature use is critical to ensure excellent performance and reliability.
Temperature range, oxidation resistance, thermal expansion, thermal stability, creep resistance, corrosion resistance, availability, and cost are all important considerations.
This article will help you learn more about heat-resistant alloys and the other significant factors that can influence the alloy’s heat resistance.
What is a Heat Resistant Alloy?
The alloys which operate well at high temperatures and show good creep resistance and strength are known as heat resistance alloys.
The heat resistance characteristics of these alloys are proven by two physical properties: the alloy’s structure and the strength of its atomic bond.
Heat-resistant alloys are classed according to their base metal, which can be nickel, iron, titanium, beryllium, or another metal.
Furthermore, heat-resistant alloys can be classified into three types based on their operating environment: alloys subjected to minor amounts of heat stress for short periods of time, alloys subjected to moderate amounts of heat stress for moderate periods of time, and alloys subjected to heat stress for extended periods of time.
Alloys That Can Withstand High Temperatures
Stainless Steels
Stainless steel is an iron-based alloy containing at least 10.5% chromium and 8% nickel with some additional metals such as molybdenum and manganese.
Stainless steel alloys are renowned for their corrosion and heat resistance, making them excellent for use in the aerospace, automotive, and construction industries, as well as particular parts such as pressure vessels, steam turbines, boilers, and piping systems.
There are several grades of stainless steel (309S, 310S, 904L) which have different compositions, properties, and applications.
Nickel based superalloys
Nickel-based superalloys are high-temperature corrosion-resistant alloys that are commonly utilized at temperatures above 500°C. They often include up to ten alloying elements, including light elements such as boron or carbon, and heavy reactive elements such as tantalum, tungsten, or rhenium. Even at temperatures near their melting points, superalloys have great resistance to creep, sulfidation, and oxidation.
Nickel-base superalloys have been widely employed in aerospace, power generation, gas turbines, and automotive high-temperature applications due to their superior characteristics at increased temperatures.
Tantalum
Tantalum (Ta) is a bright, silver-gray metal in Periodic Group 5 that is distinguished by its extremely high melting point, high density, and excellent resistance to all acids except hydrofluoric. Due to an oxidized coating on its surface, it is virtually corrosion-resistant. Tantalum is very helpful in high-temperature applications like aircraft engines and electronic devices.
Other Factors That Affect An Alloy's Heat Resistance
When subjected to extended heat, each alloy has qualities that cause it to react differently than other alloys.
As a result, you must review the technical data, which specifies the alloy’s qualities, before choosing if it is the ‘best fit’ for the given operating environment.
The operating temperature is frequently the first and, in some cases, the only data point that many people consider when selecting an alloy. This is the incorrect course of action.
Heat-resistant alloys should not be chosen just on the basis of their maximum operating temperature; there are numerous additional factors to consider.
These are some examples:
- At a given temperature, the mechanical characteristics of the alloy.
- The alloy’s oxidation resistance.
- The resistance of the alloy to extreme temperatures corrosion.
- The material’s metallurgical stability.
- A specific alloy’s chemical composition
- Other alloying elements composition which can enhance the strength and stability
- Environmental factors (gases and chemicals) can also affect.
- Proper method of heat treatment
How to choose the right supplier for your high temperature applications?
Whenever you want to buy materials for your high temperature applications, choose a well-known supplier and never compromise on quality.
Deal with a trusted supplier that fulfills all of your application’s requirements.
We have many years of experience in manufacturing and supplying all types of heat-resistant alloys.
Conclusion
All the high-temperature heat resistance alloys have different composition properties and are used at different temperature ranges.
Due to their outstanding properties, heat resistance alloys are mostly used in many high temperature applications.
Before choosing a heat-resistant alloy, you should know your application’s specifications and environmental conditions.
Content us with all your application requirements and our staff will give proper guidelines and suggest a more suitable alloy for your project.
