ThePipingMart Blog Grades AMS 4161 Aluminum Alloy – Composition, Properties and Uses

AMS 4161 Aluminum Alloy – Composition, Properties and Uses

AMS 4161

Regarding high-performance alloys, AMS 4161 is one of the most sought-after materials. Due to its unique composition and exceptional properties, this alloy is widely used in aerospace, defence, automotive, and other industries. However, if you need to become more familiar with AMS 4161, you might wonder what it is and why it’s so special. In this blog post, we’ll dive into AMS 4161 and explore everything you need about this amazing alloy.

What is AMS 4161?

AMS 4161 (also known as 6061 Aluminum Alloy) might sound like a bunch of letters and numbers, but it’s a vital standard for fluid fittings in the aviation industry. It ensures that the fittings used in aircraft fluid systems meet certain specifications and won’t fail under pressure or extreme temperatures. This helps to ensure the safety of everyone on board the aircraft. While it may seem like a small detail, the importance of standards like AMS4161 cannot be overstated when it comes to the reliability and safety of an aircraft. So next time you’re flying, you can rest assured that your aircraft has passed rigorous standards like AMS4161 to keep you safe in the skies.

What Form is AMS 4161 Available at Piping Mart?

  • Pipes
  • Tubing
  • Sheet Plates
  • Pipe Fittings
  • Forged Fittings

AMS 4161 Composition

AMS 4161 is a high-strength, low-alloy steel that contains chromium, molybdenum, and vanadium as alloying elements. The alloy has superior mechanical properties, excellent low-temperature impact resistance, and high fatigue strength. The composition of AMS 4161 is carefully balanced to provide optimal strength and toughness, making it ideal for demanding applications.

Element Content (%)
Aluminium / Aluminum, Al 97.9
Magnesium, Mg 1
Silicon, Si 0.60
Copper, Cu 0.28
Chromium, Cr 0.20

AMS 4161 Physical Properties

One of the most notable physical properties of AMS 4161 is its high melting point of approximately 1,500°C. Additionally, this alloy has a density of around 7.85 g/cm³ and a relatively low coefficient of thermal expansion. Its high melting point and low thermal expansion make it an excellent choice for high-temperature applications.

Properties Metric Imperial
Density 2.7 g/cm3 0.0975 lb/in3
Melting point 588°C 1090°F

AMS 4161 Mechanical Properties

Regarding mechanical properties, AMS 4161 is incredibly strong and durable. This alloy has a minimum tensile strength of 1,130 MPa and a minimum yield strength of 920 MPa. It also has excellent fracture toughness and resistance to corrosion and wear. These qualities make it ideal for high-stress applications, such as aircraft landing gear, engine components, and structural parts.

Properties Metric Imperial
Tensile strength 310 MPa 45000 psi
Yield strength 276 MPa 40000 psi
Shear strength 207 MPa 30000 psi
Fatigue strength 96.5 MPa 14000 psi
Elastic modulus 68.9 GPa 10000 ksi
Poisson’s ratio 0.33 0.33
Elongation 12-17% 12-17%
Hardness, Brinell 95 95

AMS 4161 Equivalents

AMS 4117 ASTM B247 ASTM B429 DIN 3.3211 MIL G-18014 QQ A-200/8
ASTM B209 ASTM B307 ASTM B483 MIL A-12545 MIL G-18015 QQ A-225/8
ASTM B210 ASTM B313 ASTM B547 MIL A-22771 MIL P-25995 QQ A-250/11
ASTM B211 ASTM B316 ASTM B548 MIL F-17132A MIL T-7081 QQ A-367
ASTM B221 ASTM B345 ASTM B632 MIL F-18280 MIL W-23351 QQ A-430
ASTM B234 ASTM B361 ASTM F467 MIL F-39000 MIL W-85 QQ WW-T-700/6
ASTM B241 ASTM B404 ASTM F468 MIL F-3922 QQ A-200/16 SAE J454

AMS 4161 Uses

AMS 4161 is commonly used in the aerospace industry, where it is often used in applications that require high strength, low weight, and high corrosion resistance. It is also used in the defence industry to produce armoured vehicles and military aircraft. Additionally, AMS 4161 is used in automotive racing applications for specialized engine components and suspension parts.

AMS 4161 Hardness

The hardness of AMS 4161 can vary depending on the heat treatment applied. When the alloy is air-cooled from the austenitizing temperature, it has a hardness of around 34 HRC. However, the hardness can be increased up to 48 HRC by quenching and tempering the material. The optimal heat treatment for a specific application will depend on the required properties.


In conclusion, AMS 4161 material is an exceptional alloy with various uses across various industries. Its unique composition and exceptional properties make it ideal for high-stress applications that require strength, durability, and corrosion resistance. If you’re looking for a high-performance material for your next project, consider using AMS 4161. With its outstanding mechanical properties, it’s sure to deliver superior performance and longevity.

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