ThePipingMart Blog Grades AMS 6470 Alloy Steel – Composition, Properties and Uses

AMS 6470 Alloy Steel – Composition, Properties and Uses

AMS 6470

AMS 6470 is a low-alloy, high-strength steel widely used in various industries. It is known for its exceptional hardness, high tensile strength, and good impact resistance. This blog post will explore everything you need to know about AMS6470, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 6470?

AMS 6470 ( also known as Nitralloy 135 Alloy) metal is a high-performance alloy with a key role in the aerospace industry. This metal is known for its exceptional tensile and yield strength, making it highly durable and reliable under high-stress conditions. It primarily comprises chromium, molybdenum, and nickel, giving it impressive corrosion and oxidation resistance. AMS 6470 metal can withstand extreme temperatures, making it ideal for use in turbine engines, landing gear, and other critical aircraft components. Its strength-to-weight ratio makes it an excellent choice for structural applications where weight is a concern. Overall, AMS6470 metal is a top-of-the-line material that continues to push the boundaries of what’s possible in aerospace engineering.

AMS 6470 Composition

AMS 6470 is a special type of low alloy steel combined with other elements such as nickel, chromium, and molybdenum to enhance its properties. The exact composition of AMS 6470 depends on the manufacturer, but it generally has a carbon content of 0.28-0.33%, nickel content of 1.65-2.00%, a chromium content of 0.80-1.10%, and molybdenum content of 0.15-0.25%.

Element % Content
Carbon 0.40
Manganese 0.60
Silicon 0.30
Chromium 1.60
Molybdenum 0.35
Aluminum 1.20

AMS 6470 Physical Properties

AMS 6470 has a density of 7.85 g/cm³ and a melting point of around 1426-1500°C. It has a good strength-to-weight ratio and can withstand high temperatures. It also exhibits good wear resistance and toughness, making it an ideal material for applications involving high stress, high impact, and high wear.

Density (lbs/cubic in) Electrical conductivity (% IACS) Thermal conductivity (BTU-in/hr-ft²-°F) Specific heat capacity Thermal expansion (1/°F) Melting Point (°F)

AMS 6470 Mechanical Properties

AMS 6470 has an ultimate tensile strength of 862 MPa (125,000 psi) and 758 MPa (110,000 psi) yield strength. It also has a high elongation, so it can be stretched without breaking. The mechanical properties of AMS 6470 make it an ideal material for aerospace, defence, and automotive applications.

Yield Strength Range (Rp0.2 Offset) (ksi)
Tensile Strength Range (Mpa) 760 930
Elongation 50%
Hardness (HBW) 280 340
Modulus of Elasticity (ksi) (E): –
Machineability General Index: –

AMS 6470 Uses

AMS 6470 is widely used in the aerospace industry for manufacturing high-strength structural components, turbine discs, and critical landing gear components. It is also used in the defence industry for manufacturing munitions, missiles, and aerospace components. In addition, it is used in the automotive industry for manufacturing transmission components, engine parts, and suspension systems.

AMS 6470 Hardness

AMS 6470 has a Rockwell hardness of 48-53 HRC. This means it is significantly harder than most types of steel, making it ideal for use in high-stress applications that require good wear resistance.

AMS 6470 Heat Treatment

Heat treatment is an important process in the manufacturing of AMS 6470. The steel is first heated to a specific temperature and then cooled at a controlled rate. This process improves the mechanical properties of AMS 6470, such as hardness, strength, and flexibility. Depending on the application, different heat treatment processes, such as quenching, annealing, and tempering, may achieve the desired properties.


AMS 6470 material is a high-strength, low-alloy steel with exceptional hardness, strength, and wear resistance. Due to its exceptional properties, it is widely used in various industries, such as aerospace, defence, and automotive. If you want a strong and durable material for your next project, consider using AMS 6470. With its unique combination of properties, it is sure to meet your needs and exceed your expectations.

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