ThePipingMart Blog Grades AMS 4342 Aluminum Alloy – Composition, Properties, and Uses

AMS 4342 Aluminum Alloy – Composition, Properties, and Uses

AMS 4342

AMS 4342 is a special alloy steel that has become popular over the years. This type of steel is used across many applications and industries, from aerospace and defence to automotive and medical sectors to energy and construction fields. In this blog, we will delve into the composition of AMS 4342, its physical and mechanical properties, uses, and how it is heat-treated to achieve optimal performance. So, let’s get started and learn about this incredible material!

What is AMS 4342?

AMS 4342 (also known as 7050 Aluminium Alloy) is a specification for a specific alloy used in the aerospace industry. This alloy is composed of high levels of nickel and titanium, which give it exceptional strength and durability. It produces various aerospace components such as turbine engines, structural components, and landing gear. Its unique composition makes it resistant to corrosion and capable of withstanding high temperatures and pressures, making it an ideal material for use in extreme conditions. AMS4342 is a testament to the remarkable materials science that goes into the creation of modern aerospace technology.

What Form is AMS 4342 Available at Piping Mart?

  • Pipes
  • Tubing

AMS 4342 Composition

AMS 4342 sheet is a nickel-chromium-molybdenum steel alloy that comprises 0.08% carbon, 1.25% nickel, 0.50% chromium, and 0.25% molybdenum. This composition allows the alloy steel to resist corrosion, oxidation, and wear while providing good strength, toughness, and weldability. Additionally, it has excellent heat treatment capabilities, making it suitable for various applications.

Element Content (%)
Aluminum, Al 87.3 – 90.3
Zinc, Z 5.7 – 6.7
Copper, Cu 2.0 – 2.6
Magnesium, Mg 1.9 – 2.6
Zirconium, Zr 0.08 – 0.15
Iron, Fe ≤ 0.15
Silicon, Si ≤ 0.12
Mangnese, Mn ≤ 0.10
Titanium, Ti ≤ 0.06
Chromium, Cr ≤ 0.04

AMS 4342 Physical Properties

AMS 4342 plate is a tough and durable aluminium alloy that has high resistance to both impact and abrasion. It has a density of 7.8g/cm³ and a melting point of 1420-1465°C. This alloy steel also shows good fatigue strength, ductility, and toughness, making it ideal for use in harsh environments and high-stress applications.

Property Metric Imperial
Density 2.6-2.8 g/cm3 0.0939-0.101 lb/in3
Melting Point 494°C 920°F

AMS 4342 Mechanical Properties

AMS 4342 has a tensile strength of 1550 MPa and a yield strength of 1380 MPa. It also has a moderate to high level of ductility while maintaining good toughness and hardness. Further, this alloy can withstand high pressures and temperatures, making it a great material in the manufacturing of aircraft and jet engine parts, among others.

Property Metric Imperial
Hardness, Brinell 140 140
Hardness, Knoop 177 177
Hardness, Rockewell A 51.6 51.6
Hardness, Rockwell B 84 84
Hardness, Vickers 162 162
Ultimate Tensile Strength 524 MPa 76000 psi
Tensile Yield Strength 469 MPa 68000 psi
Elongation at Break 11% 11%
Modulus of Elasticity 71.6 GPa 10400 ksi
Poisson’s Ratio 0.33 0.33
Shear Modulus 26.9 GPa 3900 ksi
Shear Strength 303 MPa 44000 psi

AMS 4342 Equivalents

  • AMS 4108
  • AMS 4201
  • ASTM B247
  • ASTM B316
  • QQ A-430

AMS 4342 Specifications

  • AMS 4050: 7050-T7451 Plate
  • AMS 4107:7050-T74 Die Forging
  • AMS 4108:7050-T7452 Hand Forgings
  • AMS 4201: 7050-T7651 Plate
  • AMS 4333: 7050-T7452 Forgings
  • AMS 4340: 7050-T76511 Extrusions
  • AMS 4341: 7050-T73511 Extrusions
  • AMS 4342: 7050-T74511 Extrusions
  • ASTM B247
  • ASTM B316
  • QQ A-430
  • DMS-2233
  • BMS 7-323

AMS 4342 Uses

AMS 4342 is used across many industries and applications, including aerospace, defense, automotive, medical, energy, construction, and industrial. It is used in the production of aircraft engine parts, such as compressor disks, turbine press rings, and other high-stress applications. It is also used in the oil and gas industry, where high resistance to corrosion, wear, and fatigue is required. Besides, it is used for surgical implants, tool and die making, and hydraulic dams, among others.

AMS 4342 Hardness

AMS 4342 has a hardness range of 42-47 HRC, making it a moderately strong material. Its unique hardness range derives from its composition, and heat treatment can alter it.

AMS 4342 Heat Treatment

AMS 4342 alloy is heat-treated to enhance its properties, including ductility, toughness, and strength. The heat treatment process involves annealing, hardening, and tempering. These treatments can optimize the material for specific applications. For instance, annealing makes it more ductile and stress-resistant, while hardening improves its wear resistance and strength.


In conclusion, AMS 4342 material is a versatile steel alloy with a unique composition, physical and mechanical properties, and suitable for various applications across the industry. This type of steel holds up well in harsh environments, maintains its strength under high-stress conditions, and can resist corrosion, wear, and oxidation. Knowing AMS 4342’s composition and properties can help you determine the ideal heat treatment for your specific application, ensuring optimal performance and longevity.

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