ThePipingMart Blog Grades AMS 4129 Aluminum Alloy – Composition, Properties and Uses

AMS 4129 Aluminum Alloy – Composition, Properties and Uses

AMS 4129

If you work in industries that require materials to meet specific requirements, you’ve come across AMS materials. These materials conform to industry standards set by the Society of Automotive Engineers (SAE). One such material is AMS4129. AMS 4129 is an aluminium alloy widely used in the aerospace industry. In this blog post, we explore AMS4129’s composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 4129?

AMS 4129 (also known as 6061 Aluminum Alloy) is a material specification that describes the technical requirements for aluminium alloy sheets for use in aircraft structures. This specification is designed to meet the stringent demands of the aerospace industry, ensuring that the material used in aircraft structures is strong, lightweight, and corrosion-resistant. AMS4129 is an essential document for anyone involved in designing, building, or maintaining aircraft structures, as it provides detailed information on the properties and performance of aluminium alloy sheets. With AMS4129, you can be sure that the aluminium alloys used in your aircraft are reliable, durable, and meet the highest quality and safety standards.

What form is AMS 4129 Available at Piping Mart?

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

AMS 4129 Composition

AMS 4129 is a high-strength, heat-treatable aluminium alloy. It is composed primarily of aluminium, with small amounts of copper and magnesium. The copper content provides excellent corrosion resistance, while magnesium offers strength.

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

AMS 4129 Physical Properties

AMS 4129 has a density of 2.82 grams per cubic centimetre. Its melting point is 580°C, and its thermal conductivity is 142W/mK. It has a coefficient of thermal expansion (CTE) of 23.8 x 10^-6/K. These properties make it an ideal material for use in a wide range of applications requiring high strength and good corrosion resistance.

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

AMS 4129 Mechanical Properties

AMS 4129 has excellent mechanical properties, making it a popular choice for industrial applications. It has a tensile strength of 480MPa and a yield strength of 420MPa. Its elongation at break is 10%, and its shear power is 330MPa.

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 4129 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 4129 Uses

AMS 4129 is an ideal material for the aerospace industry, specifically in manufacturing aircraft structures and parts. Its high strength-to-weight ratio and corrosion resistance make it a perfect candidate for use in applications where weight savings are essential. It is also used in constructing high-performance race cars and sports equipment due to its strength and durability.

AMS 4129 Hardness

AMS 4129 has a hardness rating of 115-125HB. This is a measure of its resistance to deformation or penetration. It’s high hardness rating, AMS 4129, can withstand wear and tear, making it suitable for harsh environments.

AMS 4129 Heat Treatment

AMS 4129 is a heat-treatable alloy. It can be strengthened by heat treatment, which involves heating the material to a specific temperature and then cooling it rapidly. This process, known as quenching, can improve the material’s strength and hardness.


In conclusion, AMS 4129 is an excellent material for many applications where strength and corrosion resistance are essential. Its physical and mechanical properties make it an ideal choice for the aerospace industry, high-performance racing, and sports equipment. Its hardness and heat-treatability make it durable and long-lasting. With its many beneficial properties, it’s no wonder why AMS 4129 is a popular choice for many industrial applications.

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