ThePipingMart Blog Grades Alloy Steel UNS K90941 – Composition, Properties and Uses

Alloy Steel UNS K90941 – Composition, Properties and Uses

UNS K90941

UNS K90941 is low-alloy steel, gaining significant popularity in various industries. Known for its excellent strength and corrosion resistance, this alloy has many chemical, petrochemical, power generation, and oil and gas applications. You’re in the right place if you want a better grip on UNS K90941. This blog will closely examine the composition, physical and mechanical properties, heat treatment, hardness, welding, and corrosion resistance of UNS K90941 steel.

UNS K90941 Composition

The UNS K90941 low alloy steel contains a variety of elements such as Cobalt (Co), Molybdenum (Mo), Chromium (Cr), Nickel (Ni), and Iron (Fe). The composition of this alloy makes it an ideal choice for use in high-temperature applications.

UNS K90941 Physical Properties

The density of UNS K90941 is 8.05 g/cm³. It has a melting point of 1404°C and a boiling point of 3353°C. Moreover, its specific heat capacity is 482 J/kg K.

UNS K90941 Mechanical Properties

UNS K90941 has excellent strength and yield strength of 450-950 MPa. The tensile strength of this alloy ranges from 1000-1500 MPa. Its elongation at break ranges from 10 to 30%. This alloy also possesses great toughness and impact resistance.

UNS K90941 Uses

The UNS K90941 alloy is commonly used in producing gas turbine engines, steam turbines, and power plants. Moreover, it also finds applications in industrial furnace components and heat exchangers. This alloy is also common in the chemical, petrochemical, and oil and gas industries.

UNS K90941 Hardness

The hardness of UNS K90941 is another crucial factor that makes it a valuable alloy. It has a Brinell hardness of 220-230 HB.

UNS K90941 Heat Treatment

The heat treatment process of UNS K90941 enhances its mechanical properties. The steel is typically austenitized and quenched in oil or water before undergoing tempering. This process improves the steel’s strength and significantly impacts the alloy’s hardness, toughness, and ductility.

UNS K90941 Welding

The UNS K90941 can be welded using Gas Tungsten Arc Welding (GTAW) or Gas Metal Arc Welding (GMAW) methods. It is recommended that the welding process should be performed using low hydrogen electrode wires to eliminate the risk of hydrogen embrittlement.

UNS K90941 Corrosion Resistant

One of the significant advantages of UNS K90941 is its excellent corrosion-resistant properties. It can resist corrosion even in extreme environments, such as high temperatures or high-pressure environments.


UNS K90941 is a low-alloy steel that continues to expand its influence among various industries. Its unique properties and strength make it an ideal choice in harsh environments. Understanding its composition, physical and mechanical properties, heat treatment, hardness, welding, and corrosion resistance can help you make informed decisions about its use in your applications. So, to succeed in your operations, consider using UNS K90941 steel.

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