ThePipingMart Blog Grades AMS 4194 Aluminum Alloy – Composition, Properties and Uses

AMS 4194 Aluminum Alloy – Composition, Properties and Uses

AMS 4194

AMS4194 is an aluminium alloy used in various applications due to its unique composition and properties. It is used in the aerospace industry mainly for its strength and resistance to corrosion. This blog post will cover everything you need to know about AMS 4194, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 4194?

AMS 4194 (also known as 2024 Aluminum Alloy) may sound like a mystery code, but it’s an important specification for the aviation industry. It refers to a sealant used on aircraft fuel tanks to prevent leaks. But AMS4194 is not just any sealant – it’s specially designed to withstand extreme conditions like high-altitude flight, temperature fluctuations, and exposure to jet fuel. This high-performance sealant is vital for ensuring the safety and reliability of aircraft and is subject to rigorous testing and quality control. Next time you travel by plane, you can rest assured that AMS4194 is helping to keep you safe in the skies.

What Form is AMS 4194 Available at Piping Mart?

  • Pipes
  • Tubing

AMS 4194 Composition

AMS4194 is a heat-treatable aluminium alloy that is composed of a variety of elements in varying amounts. The major elements of the alloy are copper, magnesium, and zinc, and it also contains small amounts of manganese, silicon, chromium, and iron. The percentage composition of each element plays a crucial role in the properties exhibited by this alloy.

Element Content(%)
Aluminum 93.5
Copper, Cu 4.4
Silicon, Si 0.8
Magnesium, Mg 0.5
Cromium, Cr ≤0.10
Manganese, Mn ≤0.6

AMS 4194 Physical Properties

One of the most important properties of AMS 4194 is its high strength-to-weight ratio. It is a lightweight alloy with excellent corrosion resistance, making it an ideal material for aerospace components. With a density of 2.82 g/cm³, it is one of the most lightweight alloys available. The alloy also has a high melting point of 585°C, which makes it suitable for high-temperature applications.

Properties Metric Imperial
Density 2.8 g/cm3 0.1018 lbs/in3
Melting Point 510°C 950°F

AMS 4194 Mechanical Properties

AMS 4194 has several mechanical properties, making it a popular choice for various components. The alloy has excellent weldability and machinability, so it can be easily formed into desired shapes using various methods. It also has a high tensile strength of 470 MPa and a yield strength of 320 MPa. These properties give the alloy high durability, making it suitable for various applications.

Properties Metric Imperial
Hardness, Brinell 105 105
Hardness, Knoop 132 132
Hardness, Rockwell A 42.8 42.8
Hardness, Rockwell B 67 67
Hardness, Vickers 118 118
Tensile Strength, Ultimate 427 MPa 62000 psi
Tensile Strength, Yield 290 MPa 42000 psi
Elongation at Break 20% 20%
Modulus of Elasticity 72.4 GPa 10500 ksi
Poisson’s Ratio 0.33 0.33
Fatigue Strength 262 MPa 38000 psi
Shear Modulus 28 GPa 4060 ksi

AMS 4194 Equivalents

ASTM BB241 DIN 3.1255 MIL T-15089 QQ A-200/2 QQ A-225/4
QQ A-250/4 QQ A-367 SAE J454

AMS 4194 Uses

AMS 4194 has been widely used in the aerospace industry, mainly for its high strength and resistance to corrosion. It is used to manufacture various components, such as fuselage frames, wing skins, and structural components. The alloy is also used in other industries, such as marine and automotive, where its properties are equally valued.

AMS 4194 Hardness

The hardness of AMS 4194 can be measured using different methods. It has a Brinell hardness of 130 HB, which measures the metal’s resistance to indentation. The alloy also has a Rockwell hardness of 70 HRB, which measures the material’s ability to withstand indentation.

AMS 4194 Heat Treatment

AMS 4194 can be heat-treated to achieve different properties. The heat treatment process involves annealing, quenching, and tempering. Annealing softens the alloy, while quenching makes it hard and brittle. Tempering, on the other hand, is used to reduce the brittleness of the alloy and improve its toughness. The heat treatment process can be adjusted to achieve different properties depending on the intended use of the alloy.


AMS 4194 material is a versatile and reliable aluminium alloy widely used in various applications. Its unique properties, such as its high strength-to-weight ratio, excellent corrosion resistance, and high durability, make it an ideal material for aerospace. Its composition, physical and mechanical properties, uses, hardness and heat treatment have all been covered in this blog post. If you need a high-quality, lightweight material for your components, AMS 4194 is worth considering.

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