ThePipingMart Blog Grades AMS 4025 Aluminum Alloy – Composition, Properties and Uses

AMS 4025 Aluminum Alloy – Composition, Properties and Uses

AMS 4025

If you work in the aerospace industry, you might have heard about AMS4025. It is one of the most commonly used materials in the aerospace industry due to its superior strength and durability. This blog post will closely examine AMS 4025 and explore its composition, physical and mechanical properties, and uses.

What is AMS 4025?

If you’re in the aerospace industry, you may have encountered the term “AMS 4025” (also known as 6061 Aluminum Alloy) and wondered what it means. Well, wonder no more because we’re here to give you the lowdown. AMS 4025 is a specification for aluminium alloy sheets and plates, particularly for aerospace applications. It details the alloy’s chemical composition, mechanical properties, and heat treatment requirements, ensuring it meets strict industry standards. By adhering to AMS4025, manufacturers can ensure the quality and reliability of their products, giving customers peace of mind regarding the safety and performance of their aircraft. So if you’re looking for a high-quality aluminium alloy sheet and plate for your next aerospace project, ensure it meets the AMS4025 specification.

What Form Is AMS 4025 Available at Piping Mart?

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

AMS 4025 Composition

AMS4025 is an aluminium alloy typically composed of magnesium, silicon, copper, iron, and zinc. It has a unique chemical composition giving it excellent strength, corrosion resistance, and machinability. In addition, it also has a good welding ability, making it suitable for various aerospace applications.

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

AMS 4025 Physical Properties

AMS 4025 has a density of 2.73 g/cm³ and a melting point of 594-651°C. It also exhibits high thermal and electrical conductivity, making it an excellent choice for electrical applications. Compared to other aluminium alloys, AMS 4025 has a moderate level of toughness.

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

AMS 4025 Mechanical Properties

AMS 4025 has excellent mechanical properties, making it a popular choice for aerospace applications. It has a tensile strength of 460 MPa and a yield strength of 400 MPa. The alloy has a high elongation at break, meaning it can bend and deform without breaking. It also exhibits good fatigue strength and can withstand cyclic loading.

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 4025 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 4025 Uses

AMS 4025 is used for various aerospace applications, such as aircraft skins, wing spars, and structural components. It also manufactures helicopter rotor blades, engine components, and other critical parts that require high strength and durability. In addition, it is also used in the automotive and marine industries due to its excellent corrosion resistance.

AMS 4025 Hardness

AMS 4025 has a Brinell hardness of 120-140, depending on the temper of the material. The hardness of the material can be increased by subjecting it to heat treatment, which can improve its strength and toughness.

AMS 4025 Heat treatment

Heat treatment is when the material is heated and cooled to change its physical and mechanical properties. In the case of AMS 4025, heat treatment can be used to improve its strength and hardness. The most common heat treatment method used for AMS 4025 is T6, which involves solution heat treatment and artificial ageing.


In conclusion, AMS 4025 material is a famous aluminium alloy widely used in aerospace due to its superior strength, durability, and corrosion resistance. It has excellent mechanical and physical properties, making it a popular choice for critical applications such as aircraft skins, wing spars, and engine components. AMS 4025 can be subjected to heat treatment to improve its strength and hardness, and it has good welding ability, making it easy to use for various applications. Whether you are an engineer or a manufacturing professional, it is essential to understand the properties of AMS 4025 and its versatility in various industries.

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