ThePipingMart Blog Grades AMS 6442 Alloy Steel – Composition, Properties, and Uses

AMS 6442 Alloy Steel – Composition, Properties, and Uses

AMS 6442

Steel is widely used in numerous applications, and its properties, such as strength, toughness, and wear resistance, are reasons it is preferred in industrial manufacturing. AMS 6442 is a particular type of steel that has become popular in various industries due to its unique properties. This blog will discuss AMS 6442’s composition, physical and mechanical properties, hardness, and heat treatment.

What is AMS 6442?

AMS 6442 (also known as Alloy Steel 52100) metal is a high-strength steel alloy used in various industries, including aerospace, defence, and oil and gas exploration. This metal is known for its impressive mechanical properties, including excellent toughness, corrosion resistance, and wear resistance. It is also highly machinable and can be readily welded or heat-treated to achieve specific performance characteristics. Whether you are designing a critical part for a fighter jet or a specialized tool for offshore drilling, AMS6442 metal is an excellent choice for its outstanding combination of strength and durability.

What Form is AMS 6442 Available at Piping  Mart?

  • Bars

AMS 6442 Composition

AMS 6442 contains low carbon, high nickel, and chromium alloy. Other elements include molybdenum, silicon, vanadium, cobalt, and copper. The controlled alloy content of AMS 6442 ensures excellent resistance to wear and fatigue.

Element Content (%)
Iron, Fe 96.5 – 97.32
Chromium, Cr 1.30 – 1.60
Carbon, C 0.980 – 1.10
Manganese, Mn 0.250 – 0.450
Silicon, Si 0.150 – 0.300
Sulfur, S ≤ 0.0250
Phosphorous, P ≤ 0.0250

AMS 6442 Physical Properties

AMS 6442 has a density of about 7.85 g/cm3, which is relatively low compared to other steels. Its melting point is about 1425°C (2597°F). This steel has a thermal expansion coefficient of 11.5 µm/m°C and a thermal conductivity of 43.8 W/mK.

Properties Metric Imperial
Density 7.81 g/cm3 0.282 lb/in³
Melting point 1424°C 2595°F

AMS 6442 Mechanical Properties

The mechanical properties of AMS 6442 include high tensile strength, yield strength, and flexibility. Its tensile strength can reach up to 2150 MPa, and its yield strength is 2000 MPa. The toughness of this steel is also impressive, making it suitable for use in applications that require high shock resistance and strength.

Properties Metric Imperial
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Hardness, Brinell
Hardness, Knoop (converted from Rockwell C hardness) 875 875
Hardness, Rockwell C (quenched in oil from 150°C tempered) 62 62
Hardness, Rockwell C (quenched in water from 150°C tempered) 64 64
Hardness, Rockwell C (quenched in oil) 64 64
Hardness, Rockwell C (quenched in water) 66 66
Hardness, Vickers (converted from Rockwell C hardness) 848 848
Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) 40 40

AMS 6442 Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@ 23-280°C/73.4- 36°F, annealed) 11.9 µm/m°C 6.61 µin/in°F
Thermal conductivity (typical steel) 46.6 W/mK 323 BTU in/hr.ft².°F

AMS 6442 Uses

AMS 6442 primarily manufactures aircraft parts, particularly bearings and gears. Its high wear and fatigue resistance and its strength make it ideal for these components. It is also used in manufacturing turbine engine components, power transmission components, and heavy-duty engineering applications.

AMS 6442 Hardness

AMS 6442 has high hardness, which is why it is often used in applications that require extreme wear resistance. Its Rockwell hardness can range from 57 to 62.

AMS 6442 Heat Treatment

AMS 6442 can be heat-treated to enhance its mechanical properties. Heat treatment processes like quenching and tempering can increase the strength and toughness of this steel.


AMS 6442 steel is a unique low alloy steel popular in numerous industrial applications requiring high strength, wear resistance, and toughness. It is essential to understand its properties and applications in choosing the best material for particular components. This steel’s composition and properties make it a popular choice in the aerospace and engineering industries. Its high-performance characteristics have made it indispensable in manufacturing turbine engine components, power transmission components, and heavy-duty engineering applications.

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