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Cobalt Alloys and Their Uses

Cobalt Alloys and Their Uses

Cobalt alloys are a type of metal alloy that contains cobalt as the primary element. These alloys have a variety of uses in industries ranging from aerospace to jewelry making due to their unique properties. This blog post will discuss the different types of cobalt alloys and how they are used in various applications.



Cobalt-based Alloys

The most common cobalt-based alloy is stainless steel. It is composed of iron, chromium, and a small amount of cobalt. This alloy has excellent corrosion resistance and is widely used in aircraft engines, surgical instruments, and marine equipment applications. Other cobalt-based alloys include high-speed steel (HSS), which contains tungsten and molybdenum to increase its heat resistance; Stellite, comprised of chromium, tungsten, and carbon for improved wear resistance; and Hastelloy C276, which has been designed for use in highly corrosive environments.

Nickel-Based Alloys

Nickel-based alloys also contain cobalt but in much smaller amounts than cobalt-based ones. They are typically composed of nickel, chromium, iron, molybdenum, or tungsten for increased strength or heat resistance. Nickel-based alloys are commonly used in offshore oil production and nuclear power plants due to their superior corrosion resistance compared to other materials. Examples include Inconel 718 (which contains niobium) and Alloy 59 (which contains copper).

Cobalt Chrome Alloys

Cobalt chrome alloys are stainless steel types containing both cobalt and chromium for improved hardness and weldability. These alloys are popularly used in medical implants due to their biocompatibility with the human body; they also find use in high-performance automotive parts due to their excellent strength at higher temperatures. Examples include Elgiloy (containing nickel) and MP35N (containing molybdenum).


Cobalt alloys offer a range of unique properties that make them ideal for many applications across multiple industries. Whether you need stainless steel for an aircraft engine or Elgiloy for medical implants, there’s sure to be a type of cobalt alloy that meets your needs. With so many types available—cobalt-based, nickel-based, or cobalt chrome—it’s important to understand their differences before selecting one for your project or application. Knowing each type’s advantages can help you make an informed decision on which one best fits your needs while saving time and money along the way!


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